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Gong LJ, Shi HL, Yang J, Han QZ, Ren YH, He SY, Zhao YH, Jiang ZT. Electronic structures, transport properties, and optical absorption of bilayer blue phosphorene nanoribbons. Phys Chem Chem Phys 2023; 25:22487-22496. [PMID: 37581353 DOI: 10.1039/d3cp02848h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
Based on first-principles density functional theory and nonequilibrium Green's function, we study the electronic band structures, the electronic transport properties, and the optical absorption of bilayer blue phosphorene nanoribbons (BPNRs). Both bilayer armchair BPNRs (a-BPNRs) and zigzag BPNRs (z-BPNRs) behave as semiconductors in the narrow nanoribbon case and metals in the wide nanoribbon case, sharply different from their monolayer counterparts where the monolayer a-BPNRs (z-BPNRs) are always semiconducting (metallic). This indicates that interlayer couplings or the increasing layer number may induce the switching of the conductivity of the monolayer BPNRs, which is absent in graphene and phosphorene nanoribbons. Furthermore, we explore the edge states of the energy bands near Fermi energy, and find that there are almost no pure edge-state band branches in the bilayer BPNRs, which can be attributed to the interlayer couplings between the edge-states in one layer and the bulk-states in the other. Consequently, the resulting complex band structures cannot be directly analyzed any more in the framework of the two-body coupling picture just according to the simple band structures of the monolayer BPNRs. Finally, we present the current-voltage characteristics and the optical absorption of the bilayer a-BPNRs and z-BPNRs. The influences of the nanoribbon width and the interlayer couplings on the current and the anisotropic optical absorption can be understood based on the complex energy band structures. This research should be an important reference of extending the field of BPNRs from the monolayer to the bilayer case, and deepen the understanding of the difference between the monolayer and bilayer nanoribbons in different materials.
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Affiliation(s)
- L J Gong
- School of Physics, Beijing Institute of Technology, Beijing 100081, China.
| | - H L Shi
- School of Physics, Beijing Institute of Technology, Beijing 100081, China.
| | - J Yang
- Shandong Graphenjoy Advanced Material Co. Ltd, Dezhou 253072, China.
| | - Q Z Han
- Beijing Academy of Quantum Information Sciences, Beijing 100193, China.
| | - Y H Ren
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - S Y He
- School of Physics, Beijing Institute of Technology, Beijing 100081, China.
| | - Y H Zhao
- University of Chinese Academy of Sciences, Beijing 100049, China
- National Basic Science Data Center, Beijing 100190, China
| | - Z T Jiang
- School of Physics, Beijing Institute of Technology, Beijing 100081, China.
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Huang J, Zhu Y, Xie R, Hu Y, Li S, Lei S, Li Q. Tuning the spin caloritronic transport properties of InSe monolayers via transition metal doping. NEW J CHEM 2022. [DOI: 10.1039/d2nj02635j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The thermal-driven current through the device is dominated by the spin-down electrons within a wide temperature range.
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Affiliation(s)
- Jing Huang
- School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, China
| | - Ying Zhu
- School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, China
| | - Rong Xie
- School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, China
| | - Yujie Hu
- Department of Chemical Physics & Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Shujuan Li
- Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang, Hubei, 441053, China
| | - Shulai Lei
- Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang, Hubei, 441053, China
- Institute of Chemistry, Free University of Berlin, Arnimallee 22, Berlin D-14195, Germany
- Hubei Longzhong Laboratory, Xiangyang, 441000, Hubei, China
| | - Qunxiang Li
- Department of Chemical Physics & Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
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Tan X, Zhang L, Liu L. Bipolar magnetic semiconductor properties and spin-dependent Seebeck effects induced by nanoscale graphene domains doped into armchair boron nitride nanoribbons. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137386] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Pandey N, Kumar A, Chakrabarti S. First Principle Study of Temperature-Dependent Magnetoresistance and Spin Filtration Effect in WS 2 Nanoribbon. ACS Appl Mater Interfaces 2019; 11:39248-39253. [PMID: 31557436 DOI: 10.1021/acsami.9b10618] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
An applicable use of density functional theory (DFT) along with nonequilibrium Green's function (NEGF) is done for exploring the temperature-dependent spin electron transport nature in a ferromagnetic tungsten disulfide (WS2) nanoribbon. To demonstrate the effect of temperature on spin filtration and spin Seebeck effect, we evaluated vital parameters such as spin-polarized current and spin filtration efficiency. Spin filtration efficiency of around ∼95% is obtained in the high-temperature difference range. The high temperature (TL) of the left electrode in comparison to the high temperature (TR) of the right electrode results in higher and lower spin filtration efficiency in parallel magnetization (PM) and antiparallel magnetization (APM), respectively. Transmission spectrum plots at equilibrium are also calculated in PM and APM to justify the temperature-dependent spin transport behavior in the WS2 nanoribbon. Giant thermal magnetoresistance around 1.934 × 103% is achieved. The temperature-dependent negative differential resistance behavior of the current plot has been observed. Huge value of thermal magnetoresistance (MR) and excellent spin filtration obtained for WS2 nanoribbon suggests the potential application of this material in spin caloritronic devices.
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Affiliation(s)
- Nivedita Pandey
- Department of Electrical Engineering , Indian Institute of Technology , Bombay 400076 , India
| | - Abhishek Kumar
- Department of Electrical Engineering , Indian Institute of Technology , Bombay 400076 , India
| | - Subhananda Chakrabarti
- Department of Electrical Engineering , Indian Institute of Technology , Bombay 400076 , India
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Li J, Zhang G, Peng C, Wang W, Yang J, Wang Y, Cheng Z. Magneto-Seebeck effect in Co 2FeAl/MgO/Co 2FeAl: first-principles calculations. Phys Chem Chem Phys 2019; 21:5803-5812. [PMID: 30805579 DOI: 10.1039/c8cp07697a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The magneto-Seebeck effect has recently attracted considerable attention because of its novel fundamental physics and future potential application in spintronics. Herein, employing first-principles calculations and the spin-resolved Boltzmann transport theory, we have systematically investigated the electronic structures and spin-related transport properties of Co2FeAl/MgO/Co2FeAl multilayers with parallel (P) and anti-parallel (AP) magnetic alignment. Our results indicate that the sign of tunneling magneto-Seebeck (TMS) value with Co2/O termination is consistent with that of the measured experimental result although its value (-221%) at room temperature is smaller than the experimental one (-95%). The calculated spin-Seebeck coefficients of the Co2/O termination with P and AP states and the FeAl/O termination with the AP state are all larger than other typical Co2MnSi/MgO/Co2MnSi heterostructures. By analyzing the geometries, electronic structures, and magnetic behaviors of two different terminations (Co2/O and FeAl/O terminations), we find that the two terminations in the interface region form anti-bonding and bonding states, reconstructing the energy gap, changing the magnetic moment of O atoms, and improving the spin-polarization (-82%). This phenomenon can be ascribed to the charge transfer and hybridization between Co/Fe 3d and O 2p states, which also results in a bowknot orbital shape of Co atoms with Co2/O termination and an ankle shape of Co atoms with FeAl/O termination far away from the interface. Moreover, there are spin-splitting transmission gaps with the Co2/O-termination around the Fermi level, while the transmission gaps with the FeAl/O-termination are closed and thus show a typical metallic character. Our findings will guide the experimental design of magneto-Seebeck devices for future spintronic applications.
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Affiliation(s)
- Jingyu Li
- Institute for Computational Materials Science, School of Physics and Electronics, Henan University, Kaifeng 475004, People's Republic of China.
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Villegas CEP, Rodin AS, Carvalho A, Rocha AR. Two-dimensional exciton properties in monolayer semiconducting phosphorus allotropes. Phys Chem Chem Phys 2018; 18:27829-27836. [PMID: 27711643 DOI: 10.1039/c6cp05566d] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Excitons play a key role in technological applications since they have a strong influence on determining the efficiency of photovoltaic devices. Recently, it has been shown that the allotropes of phosphorus possess an optical band gap that can be tuned over a wide range of values including the near-infrared and visible spectra, which would make them promising candidates for optoelectronic applications. In this work we carry out ab initio many-body perturbation theory calculations to study the excitonic effects on the optical properties of two-dimensional phosphorus allotropes: the case of blue and black monolayers. We elucidate the most relevant optical transitions, exciton binding energy spectrum as well as real-space exciton distribution, particularly focusing on the absorption spectrum dependence on the incident light polarization. In addition, based on our results, we use a set of effective hydrogenic models, in which the electron-hole Coulomb interaction is included to estimate exciton binding energies and radii. Our results show an excellent agreement between the many-body methodology and the effective models.
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Affiliation(s)
- Cesar E P Villegas
- Istituto di Struttura della Materia of the National Research Council, Via Salaria Km 29.3, I-00016 Monterotondo Stazione, Italy and Instituto de Física Teórica, Universidade Estadual Paulista (UNESP), Rua Dr. Bento T. Ferraz, 271, São Paulo, SP 01140-070, Brazil.
| | - A S Rodin
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, Singapore 117546, Singapore
| | - Alexandra Carvalho
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, Singapore 117546, Singapore
| | - A R Rocha
- Instituto de Física Teórica, Universidade Estadual Paulista (UNESP), Rua Dr. Bento T. Ferraz, 271, São Paulo, SP 01140-070, Brazil.
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Zhu SC, Yip CT, Peng SJ, Wu KM, Yao KL, Mak CL, Lam CH. Half-metallic and magnetic semiconducting behaviors of metal-doped blue phosphorus nanoribbons from first-principles calculations. Phys Chem Chem Phys 2018; 20:7635-7642. [DOI: 10.1039/c7cp08635k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We investigate the electronic and magnetic properties of substitutional metal atom impurities in two-dimensional (2D) blue phosphorene nanoribbons using first-principles calculations.
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Affiliation(s)
- Si-Cong Zhu
- College of Science and Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education
- Wuhan University of Science and Technology
- Wuhan 430065
- China
- Department of Applied Physics
| | - Cho-Tung Yip
- Department of Applied Physics
- Hong Kong Polytechnic University
- Hung Hom
- China
- Department of Physics
| | - Shun-Jin Peng
- College of Science and Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education
- Wuhan University of Science and Technology
- Wuhan 430065
- China
| | - Kai-Ming Wu
- College of Science and Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education
- Wuhan University of Science and Technology
- Wuhan 430065
- China
| | - Kai-Lun Yao
- Wuhan National High Magnetic Field Center and School of Physics
- Huazhong University of Science and Technology
- Wuhan 430074
- China
| | - Chee-Leung Mak
- Department of Applied Physics
- Hong Kong Polytechnic University
- Hung Hom
- China
| | - Chi-Hang Lam
- Department of Applied Physics
- Hong Kong Polytechnic University
- Hung Hom
- China
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Abstract
The spin-Seebeck effect (SSE) in linearly hydrogenated carbon nanotubes (CNTs) is realized, where partial hydrogenation makes CNTs acquire magnetism. Moreover, an odd–even effect of the SSE is observed, and the even cases could be used as spin-Seebeck diodes, without the need for an electric field or gate voltage.
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Affiliation(s)
- Hong-Li Zeng
- College of Natural Science
- Nanjing University of Posts and Telecommunications
- Nanjing 210046
- China
- Key Laboratory of Radio Frequency and Micro–Nano Electronics of Jiangsu Province
| | - Yan-Dong Guo
- Key Laboratory of Radio Frequency and Micro–Nano Electronics of Jiangsu Province
- Nanjing 210023
- China
- College of Electronic Science and Engineering
- Nanjing University of Posts and Telecommunications
| | - Xiao-Hong Yan
- College of Natural Science
- Nanjing University of Posts and Telecommunications
- Nanjing 210046
- China
- Key Laboratory of Radio Frequency and Micro–Nano Electronics of Jiangsu Province
| | - Jie Zhou
- Key Laboratory of Radio Frequency and Micro–Nano Electronics of Jiangsu Province
- Nanjing 210023
- China
- College of Electronic Science and Engineering
- Nanjing University of Posts and Telecommunications
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Abstract
Substitutional doping of V, Cr and Mn atoms can induce the magnetic moment in monolayer TiS3.
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Affiliation(s)
- Huiling Zheng
- Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education)
- Department of Physics
- Jilin University
- Changchun 130012
- China
| | - Mingfeng Zhu
- Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education)
- Department of Physics
- Jilin University
- Changchun 130012
- China
| | - Jianmin Zhang
- Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education)
- Department of Physics
- Jilin University
- Changchun 130012
- China
| | - Xiaobo Du
- Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education)
- Department of Physics
- Jilin University
- Changchun 130012
- China
| | - Yu Yan
- Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education)
- Department of Physics
- Jilin University
- Changchun 130012
- China
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Yang XF, Wang HL, Chen YS, Kuang YW, Hong XK, Liu YS, Feng JF, Wang XF. Giant spin thermoelectric effects in all-carbon nanojunctions. Phys Chem Chem Phys 2015; 17:22815-22. [DOI: 10.1039/c5cp02779a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigate the thermospin properties of an all-carbon nanojunction constructed by a graphene nanoflake (GNF) and zigzag-edged graphene nanoribbons (ZGNRs), bridged by the carbon atomic chains.
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Affiliation(s)
- X. F. Yang
- College of Physics and Engineering
- Changshu Institute of Technology and Jiangsu Laboratory of Advanced Functional materials
- Changshu 215500
- China
| | - H. L. Wang
- College of Physics and Engineering
- Changshu Institute of Technology and Jiangsu Laboratory of Advanced Functional materials
- Changshu 215500
- China
| | - Y. S. Chen
- College of Physics and Engineering
- Changshu Institute of Technology and Jiangsu Laboratory of Advanced Functional materials
- Changshu 215500
- China
| | - Y. W. Kuang
- College of Physics and Engineering
- Changshu Institute of Technology and Jiangsu Laboratory of Advanced Functional materials
- Changshu 215500
- China
| | - X. K. Hong
- College of Physics and Engineering
- Changshu Institute of Technology and Jiangsu Laboratory of Advanced Functional materials
- Changshu 215500
- China
| | - Y. S. Liu
- College of Physics and Engineering
- Changshu Institute of Technology and Jiangsu Laboratory of Advanced Functional materials
- Changshu 215500
- China
| | - J. F. Feng
- College of Physics and Engineering
- Changshu Institute of Technology and Jiangsu Laboratory of Advanced Functional materials
- Changshu 215500
- China
| | - X. F. Wang
- Department of physics
- Soochow University
- Suzhou 215006
- China
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