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Clean 2D superconductivity in a bulk van der Waals superlattice. Science 2020; 370:231-236. [DOI: 10.1126/science.aaz6643] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Accepted: 08/21/2020] [Indexed: 11/02/2022]
Abstract
Advances in low-dimensional superconductivity are often realized through improvements in material quality. Apart from a small group of organic materials, there is a near absence of clean-limit two-dimensional (2D) superconductors, which presents an impediment to the pursuit of numerous long-standing predictions for exotic superconductivity with fragile pairing symmetries. We developed a bulk superlattice consisting of the transition metal dichalcogenide (TMD) superconductor 2H-niobium disulfide (2H-NbS2) and a commensurate block layer that yields enhanced two-dimensionality, high electronic quality, and clean-limit inorganic 2D superconductivity. The structure of this material may naturally be extended to generate a distinct family of 2D superconductors, topological insulators, and excitonic systems based on TMDs with improved material properties.
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Homogenization of plasmonic crystals: seeking the epsilon-near-zero effect. Proc Math Phys Eng Sci 2019; 475:20190220. [PMID: 31736641 DOI: 10.1098/rspa.2019.0220] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 09/03/2019] [Indexed: 11/12/2022] Open
Abstract
By using an asymptotic analysis and numerical simulations, we derive and investigate a system of homogenized Maxwell's equations for conducting material sheets that are periodically arranged and embedded in a heterogeneous and anisotropic dielectric host. This structure is motivated by the need to design plasmonic crystals that enable the propagation of electromagnetic waves with no phase delay (epsilon-near-zero effect). Our microscopic model incorporates the surface conductivity of the two-dimensional (2D) material of each sheet and a corresponding line charge density through a line conductivity along possible edges of the sheets. Our analysis generalizes averaging principles inherent in previous Bloch-wave approaches. We investigate physical implications of our findings. In particular, we emphasize the role of the vector-valued corrector field, which expresses microscopic modes of surface waves on the 2D material. We demonstrate how our homogenization procedure may set the foundation for computational investigations of: effective optical responses of reasonably general geometries, and complicated design problems in the plasmonics of 2D materials.
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Magnetic resonance spectroscopy of an atomically thin material using a single-spin qubit. Science 2017; 355:503-507. [DOI: 10.1126/science.aal2538] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 01/06/2017] [Indexed: 02/05/2023]
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4
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Superlattice-Induced Insulating States and Valley-Protected Orbits in Twisted Bilayer Graphene. PHYSICAL REVIEW LETTERS 2016; 117:116804. [PMID: 27661712 DOI: 10.1103/physrevlett.117.116804] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Indexed: 05/25/2023]
Abstract
Twisted bilayer graphene (TBLG) is one of the simplest van der Waals heterostructures, yet it yields a complex electronic system with intricate interplay between moiré physics and interlayer hybridization effects. We report on electronic transport measurements of high mobility small angle TBLG devices showing clear evidence for insulating states at the superlattice band edges, with thermal activation gaps several times larger than theoretically predicted. Moreover, Shubnikov-de Haas oscillations and tight binding calculations reveal that the band structure consists of two intersecting Fermi contours whose crossing points are effectively unhybridized. We attribute this to exponentially suppressed interlayer hopping amplitudes for momentum transfers larger than the moiré wave vector.
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5
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Identifying structural flow defects in disordered solids using machine-learning methods. PHYSICAL REVIEW LETTERS 2015; 114:108001. [PMID: 25815967 DOI: 10.1103/physrevlett.114.108001] [Citation(s) in RCA: 152] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Indexed: 06/04/2023]
Abstract
We use machine-learning methods on local structure to identify flow defects-or particles susceptible to rearrangement-in jammed and glassy systems. We apply this method successfully to two very different systems: a two-dimensional experimental realization of a granular pillar under compression and a Lennard-Jones glass in both two and three dimensions above and below its glass transition temperature. We also identify characteristics of flow defects that differentiate them from the rest of the sample. Our results show it is possible to discern subtle structural features responsible for heterogeneous dynamics observed across a broad range of disordered materials.
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Abstract
Protein structure and dynamics are the keys to a wide range of problems in biology. In principle, both can be fully understood by using quantum mechanics as the ultimate tool to unveil the molecular interactions involved. Indeed, quantum mechanics of atoms and molecules have come to play a central role in chemistry and physics. In practice, however, direct application of quantum mechanics to protein systems has been prohibited by the large molecular size of proteins. As a consequence, there is no general quantum mechanical treatment that not only exceeds the accuracy of state-of-the-art empirical models for proteins but also maintains the efficiency needed for extensive sampling in the conformational space, a requirement mandated by the complexity of protein systems. Here we show that, given recent developments in methods, a general quantum mechanical-based treatment can be constructed. We report a molecular dynamics simulation of a protein, crambin, in solution for 350 ps in which we combine a semiempirical quantum-mechanical description of the entire protein with a description of the surrounding solvent, and solvent-protein interactions based on a molecular mechanics force field. Comparison with a recent very high-resolution crystal structure of crambin (Jelsch et al., Proc Natl Acad Sci USA 2000;102:2246-2251) shows that geometrical detail is better reproduced in this simulation than when several alternate molecular mechanics force fields are used to describe the entire system of protein and solvent, even though the structure is no less flexible. Individual atomic charges deviate in both directions from "canonical" values, and some charge transfer is found between the N and C-termini. The capability of simulating protein dynamics on and beyond the few hundred ps timescale with a demonstrably accurate quantum mechanical model will bring new opportunities to extend our understanding of a range of basic processes in biology such as molecular recognition and enzyme catalysis.
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9
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Hydrogen-enhanced local plasticity in aluminum: an ab initio study. PHYSICAL REVIEW LETTERS 2001; 87:095501. [PMID: 11531572 DOI: 10.1103/physrevlett.87.095501] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2001] [Indexed: 05/23/2023]
Abstract
Dislocation core properties of Al with and without H impurities are studied using the Peierls-Nabarro model with parameters determined by ab initio calculations. We find that H not only facilitates dislocation emission from the crack tip but also enhances dislocation mobility dramatically, leading to macroscopically softening and thinning of the material ahead of the crack tip. We observe strong binding between H and dislocation cores, with the binding energy depending on dislocation character. This dependence can directly affect the mechanical properties of Al by inhibiting dislocation cross-slip and developing slip planarity.
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Thermodynamics of C incorporation on Si(100) from ab initio calculations. PHYSICAL REVIEW LETTERS 2001; 86:4556-4559. [PMID: 11384282 DOI: 10.1103/physrevlett.86.4556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2000] [Indexed: 05/23/2023]
Abstract
We study the thermodynamics of C incorporation on Si(100), a system where strain and chemical effects are both important. Our analysis is based on first-principles atomistic calculations to obtain the important lowest-energy structures, and a classical effective Hamiltonian which is employed to represent the long-range strain effects and incorporate the thermodynamic aspects. We determine the equilibrium phase diagram in temperature and C chemical potential, which allows us to predict the mesoscopic structure of the system that should be observed under experimentally relevant conditions.
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11
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The chemical nature of surface point defects on MoO3(010): adsorption of hydrogen and methyl. J Am Chem Soc 2001; 123:2224-30. [PMID: 11456868 DOI: 10.1021/ja994376s] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report density functional theory calculations using the Adaptive Coordinate Real-space Electronic Structure (ACRES) method of the terminal oxygen vacancy on the (010) surface of MoO3, within a (2 x 2) ordered array of vacancies on the surface. Analysis of the electronic structure of this surface shows that there are unoccupied dangling d(xz) and d(z)2 orbitals perpendicular to the surface that are created by the removal of terminal oxygen. The Mo-oxygen bonds surrounding the vacancy contract; however, the overall morphology of the surface is not drastically distorted. The vacancies alter the chemical character of the surface, as shown by studies of hydrogen and methyl binding. On both the "perfect" and vacancy surfaces, hydrogen was most strongly adsorbed over the terminal oxygen and most weakly bound over the symmetric bridging oxygen. Hydrogen is bound over the Mo atom, with a slightly smaller binding energy than hydrogen over the asymmetric bridging oxygen. The most favorable binding site for methyl on the vacancy surface is over the Mo atom exposed by removal of a terminal oxygen, whereas methyl bound to terminal oxygen is most stable on the perfect surface. There is no local minimum for adsorption over the symmetric bridging oxygen; instead, a methyl placed over this site moves toward the terminal oxygen vacancy. Analysis of the bonding shows that methyl is bound more strongly than hydrogen over the Mo atom because the C 2p orbital has better overlap with the Mo d(z)2 orbital than the hydrogen 1s. In addition, the steric repulsion observed for methyl over the perfect MoO3(010) surface is more easily relieved with the presence of the terminal oxygen vacancy.
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13
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Structure of III-Sb(001) growth surfaces: the role of heterodimers. PHYSICAL REVIEW LETTERS 2000; 84:4649-4652. [PMID: 10990762 DOI: 10.1103/physrevlett.84.4649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/1999] [Indexed: 05/23/2023]
Abstract
We have determined the structure of AlSb and GaSb (001) surfaces prepared by molecular beam epitaxy under typical Sb-rich device growth conditions. Within the range of flux and temperature where the diffraction pattern is nominally (1x3), we find that there are actually three distinct, stable (4x3) surface reconstructions. The three structures differ from any previously proposed for these growth conditions, with two of the reconstructions incorporating mixed III-V dimers within the Sb surface layer. These heterodimers appear to play an important role in island nucleation and growth.
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14
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Multiscale simulation of loading and electrical resistance in silicon nanoindentation. PHYSICAL REVIEW LETTERS 2000; 84:1260-1263. [PMID: 11017493 DOI: 10.1103/physrevlett.84.1260] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/1999] [Indexed: 05/23/2023]
Abstract
Nanoindentation experiments are an excellent probe of micromechanical properties, but their interpretation is complicated by their multiscale nature. We report simulations of silicon nanoindentation, based on an extended version of the local quasicontinuum model, capable of handling complex Bravais crystals. Our simulations reproduce the experimental load vs displacement curves and provide microscopic information such as the distribution of transformed metallic phases of silicon underneath the indenter. This information is linked to the macroscopic electrical resistance, giving a satisfactory explanation of experimental results.
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15
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Modeling of Covalent Bonding in Solids by Inversion of Cohesive Energy Curves. PHYSICAL REVIEW LETTERS 1996; 77:4370-4373. [PMID: 10062521 DOI: 10.1103/physrevlett.77.4370] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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16
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Erratum: Ab initio study of hydrogen adsorption on the Si(111)-(7 x 7) surface. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:5179. [PMID: 9986484 DOI: 10.1103/physrevb.54.5179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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17
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Microscopic theory of electromigration on semiconductor surfaces. PHYSICAL REVIEW LETTERS 1996; 76:1114-1117. [PMID: 10061637 DOI: 10.1103/physrevlett.76.1114] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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18
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Variational Hilbert-space-truncation approach to quantum Heisenberg antiferromagnets on frustrated clusters. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:2546-2555. [PMID: 9983759 DOI: 10.1103/physrevb.53.2546] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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19
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Free energy of the concerted-exchange mechanism for self-diffusion in silicon. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:1310-1314. [PMID: 9983589 DOI: 10.1103/physrevb.53.1310] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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20
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Ab initio study of hydrogen adsorption on the Si(111)-(7 x 7) surface. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:17231-17237. [PMID: 9981151 DOI: 10.1103/physrevb.52.17231] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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21
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22
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Theoretical study of cubic structures based on fullerene carbon clusters: C28C and (C28)2. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:2125-2130. [PMID: 9981288 DOI: 10.1103/physrevb.52.2125] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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23
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Use of the generalized gradient approximation in pseudopotential calculations of solids. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:9521-9525. [PMID: 9977613 DOI: 10.1103/physrevb.51.9521] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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24
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Atomic structure and bonding of boron-induced reconstructions on Si(001). PHYSICAL REVIEW LETTERS 1995; 74:403-406. [PMID: 10058749 DOI: 10.1103/physrevlett.74.403] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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25
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Ideal crystal stability and pressure-induced phase transition in silicon. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:14952-14959. [PMID: 9975842 DOI: 10.1103/physrevb.50.14952] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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26
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Energetics of large lattice strains: Application to silicon. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:1535-1540. [PMID: 9976336 DOI: 10.1103/physrevb.50.1535] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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27
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Orientational order in dense molecular hydrogen: A first-principles path-integral Monte Carlo calculation. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:11822-11832. [PMID: 10010051 DOI: 10.1103/physrevb.49.11822] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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28
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Electronic properties of a cluster-based solid form of carbon: C28 hyperdiamond. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:8446-8453. [PMID: 10009613 DOI: 10.1103/physrevb.49.8446] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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29
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Adatom diffusion by orchestrated exchange on semiconductor surfaces. PHYSICAL REVIEW LETTERS 1994; 72:1714-1717. [PMID: 10055682 DOI: 10.1103/physrevlett.72.1714] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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30
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Electronic states of group-IV endohedral atoms in C28. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:17556-17561. [PMID: 10008372 DOI: 10.1103/physrevb.48.17556] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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31
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Application of gradient corrections to density-functional theory for atoms and solids. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:14944-14952. [PMID: 10008025 DOI: 10.1103/physrevb.48.14944] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Free energies of generalized stacking faults in Si and implications for the brittle-ductile transition. PHYSICAL REVIEW LETTERS 1993; 70:3752-3755. [PMID: 10053953 DOI: 10.1103/physrevlett.70.3752] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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34
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New model for icosahedral carbon clusters and the structure of collapsed fullerite. PHYSICAL REVIEW LETTERS 1993; 70:2920-2923. [PMID: 10053687 DOI: 10.1103/physrevlett.70.2920] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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35
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Symmetry and stability of solitary dimer rows on Si(100). PHYSICAL REVIEW LETTERS 1993; 70:2589-2592. [PMID: 10053601 DOI: 10.1103/physrevlett.70.2589] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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36
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Contribution of concerted exchange to the entropy of self-diffusion in Si. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:1659-1662. [PMID: 10006191 DOI: 10.1103/physrevb.47.1659] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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37
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Localized adatom vibrations in Si clusters. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:8334-8337. [PMID: 9998775 DOI: 10.1103/physrevb.44.8334] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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39
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Adsorption of As on stepped Si(100): Resolution of the sublattice-orientation dilemma. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:6534-6537. [PMID: 9998522 DOI: 10.1103/physrevb.44.6534] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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40
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Onset of metallization and related transitions in solid hydrogen. PHYSICAL REVIEW LETTERS 1991; 67:1138-1141. [PMID: 10045085 DOI: 10.1103/physrevlett.67.1138] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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41
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42
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43
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Semiconductor-surface restoration by valence-mending adsorbates: Application to Si(100):S and Si(100):Se. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:6824-6827. [PMID: 9998140 DOI: 10.1103/physrevb.43.6824] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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44
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Entropy calculation beyond the harmonic approximation: Application to diffusion by concerted exchange in Si. PHYSICAL REVIEW LETTERS 1991; 66:915-918. [PMID: 10043939 DOI: 10.1103/physrevlett.66.915] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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45
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Evidence for trimer reconstruction of Si(111) sqrt 3 x sqrt 3 -Sb: Scanning tunneling microscopy and first-principles theory. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:7230-7233. [PMID: 9994851 DOI: 10.1103/physrevb.42.7230] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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46
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Effect of surface reconstruction on stability and reactivity of Si clusters. PHYSICAL REVIEW LETTERS 1990; 64:551-554. [PMID: 10042013 DOI: 10.1103/physrevlett.64.551] [Citation(s) in RCA: 64] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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47
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48
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Electronic states due to surface doping: Si(111) sqrt 3 x sqrt 3B. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:1262-1265. [PMID: 9993836 DOI: 10.1103/physrevb.41.1262] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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49
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Scanning tunneling microscopy and first-principles theory of the Sn/GaAs(110) surface. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 40:10044-10047. [PMID: 9991549 DOI: 10.1103/physrevb.40.10044] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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50
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Isolated As antisite in GaAs: Possibility of the EL2 defect. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 40:8020-8023. [PMID: 9991243 DOI: 10.1103/physrevb.40.8020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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