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Nayak P, Srivastava P, Gupta DC. Theoretical exploration of inherent electronic, structural, mechanical, thermoelectric, and thermophysical response of KRu 4Z 12 (Z = As 12, Sb 12) filled skutterudite materials. RSC Adv 2023; 13:27873-27886. [PMID: 37731830 PMCID: PMC10508261 DOI: 10.1039/d3ra05546a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 09/06/2023] [Indexed: 09/22/2023] Open
Abstract
Using the density functional theory methodology, we have thoroughly examined KRu4As12 and KRu4Sb12 skutterudites, including their structural, electronic, mechanical, transport, and thermodynamic properties. First and foremost, using the Birch-Murnaghan equation of state, the structural stability has been calculated in terms of their total ground state and cohesive energies. With the use of the approximation approaches GGA and GGA + mBJ, the electrical structure and density of the states reveal their metallic nature. This demonstration predicts the dominant ferromagnetic spin configuration of materials by considering their electronic behavior and magnetic interactions. The ductile behavior of these alloys is also addressed by their mechanical qualities, which indicate how they might be used in engineering and industrial settings. Moreover, the semi-classical Boltzmann transport theory has been employed to examine the Seebeck coefficient as well as the electric and thermal conductivities. The general tendency of these compounds demonstrates their various potential uses as electrode materials. The quasi-harmonic Debye approximation is a method used to analyze the stability of a system under high pressures and accounts for the temperature dependency of thermodynamics. It combines the quasi-harmonic approximation, which considers the anharmonicity of vibrations, with the Debye model, which describes the vibrational modes of a solid. This approach allows for a more accurate representation of the system's behavior at different temperatures and pressures. By implementing this approximation, researchers can gain insights into the stability and thermodynamic properties of materials under extreme conditions.
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Affiliation(s)
- Poorva Nayak
- Condensed Matter Theory Group, School of Studies in Physics, Jiwaji University Gwalior India 474 011
| | - Pankakaj Srivastava
- Atal Bihari Vajpayee Indian Institute of Information Technology and Management Gwalior India 474015
| | - Dinesh C Gupta
- Condensed Matter Theory Group, School of Studies in Physics, Jiwaji University Gwalior India 474 011
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Qi Y, Lei H, Guo J, Shi W, Yan B, Felser C, Hosono H. Superconductivity in Alkaline Earth Metal-Filled Skutterudites Ba xIr 4X 12 (X = As, P). J Am Chem Soc 2017; 139:8106-8109. [PMID: 28578570 DOI: 10.1021/jacs.7b04274] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report superconductive iridium pnictides BaxIr4X12 (X = As and P) with a filled skutterudite structure, demonstrating that Ba filling dramatically alters their electronic properties and induces a nonmetal-to-metal transition with increasing the Ba content x. The highest superconducting transition temperatures are 4.8 and 5.6 K observed for BaxIr4As12 and BaxIr4P12, respectively. The superconductivity in BaxIr4X12 can be classified into the Bardeen-Cooper-Schrieffer type with intermediate coupling.
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Affiliation(s)
- Yanpeng Qi
- Materials Research Center for Element Strategy, Tokyo Institute of Technology , 4259 Yokohama, Japan
| | - Hechang Lei
- Materials Research Center for Element Strategy, Tokyo Institute of Technology , 4259 Yokohama, Japan
| | - Jiangang Guo
- Materials Research Center for Element Strategy, Tokyo Institute of Technology , 4259 Yokohama, Japan
| | - Wujun Shi
- Max Planck Institute for Chemical Physics of Solids , 01187 Dresden, Germany.,School of Physical Science and Technology, ShanghaiTech University , 200031 Shanghai, China
| | - Binghai Yan
- Department of Condensed Matter Physics, Weizmann Institute of Science , 7610001 Rehovot, Israel
| | - Claudia Felser
- Max Planck Institute for Chemical Physics of Solids , 01187 Dresden, Germany
| | - Hideo Hosono
- Materials Research Center for Element Strategy, Tokyo Institute of Technology , 4259 Yokohama, Japan.,Laboratory for Materials and Structures, Tokyo Institute of Technology , 4259 Yokohama, Japan
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Abstract
The interplay of superconductivity and magnetism is a subject of ongoing interest, stimulated most recently by the discovery of Fe-based superconductivity and the recognition that spin-fluctuations near a magnetic quantum critical point may provide an explanation for the superconductivity and the order parameter. Here we investigate magnetism in the Na filled Fe-based skutterudites using first principles calculations. NaFe4Sb12 is a known ferromagnet near a quantum critical point. We find a ferromagnetic metallic state for this compound driven by a Stoner type instability, consistent with prior work. In accord with prior work, the magnetization is overestimated, as expected for a material near an itinerant ferromagnetic quantum critical point. NaFe4P12 also shows a ferromagnetic instability at the density functional level, but this instability is much weaker than that of NaFe4Sb12, possibly placing it on the paramagnetic side of the quantum critical point. NaFe4As12 shows intermediate behavior. We also present results for skutterudite FeSb3, which is a metastable phase that has been reported in thin film form.
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Gumeniuk R, Akselrud L, Kvashnina KO, Schnelle W, Tsirlin AA, Curfs C, Rosner H, Schöneich M, Burkhardt U, Schwarz U, Grin Y, Leithe-Jasper A. Ca3Pt4+xGe13−y and Yb3Pt4Ge13: new derivatives of the Pr3Rh4Sn13 structure type. Dalton Trans 2012; 41:6299-309. [DOI: 10.1039/c2dt30339f] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yamaoka H, Jarrige I, Tsujii N, Lin JF, Ikeno T, Isikawa Y, Nishimura K, Higashinaka R, Sato H, Hiraoka N, Ishii H, Tsuei KD. Strong coupling between 4f valence instability and 3d ferromagnetism in Yb(x)Fe4Sb12 studied by resonant x-ray emission spectroscopy. PHYSICAL REVIEW LETTERS 2011; 107:177203. [PMID: 22107574 DOI: 10.1103/physrevlett.107.177203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Indexed: 05/31/2023]
Abstract
We have investigated the temperature and pressure dependency of the electronic structure of Yb-filled skutterudites, YbFe(4)Sb(12) and Yb(0.88)Fe(4)Sb(12), using x-ray absorption and emission spectroscopies. An anomalous increase of the Yb valence, which is beyond the conventional Anderson model picture, is found to coincide with the onset of the ferromagnetic order in the x=0.88 sample below 20 K. In contrast, the nearly stoichiometric YbFe(4)Sb(12) is paramagnetic down to 2 K and the Yb valence is independent of temperature. This evidences a close interplay between the magnetic instability of the Fe 3d electrons and valence instability of the Yb 4f electrons. Under pressure, a sudden increase in the valence is found to occur around 13 GPa for YbFe(4)Sb(12) and 17 GPa for Yb(0.88)YbFe(4)Sb(12).
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Affiliation(s)
- Hitoshi Yamaoka
- Harima Institute, The Institute of Physical and Chemical Research (RIKEN), Sayo, Hyogo 679-5148, Japan
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Drake BL, Grandjean F, Kangas MJ, Okudzeto EK, Karki AB, Sougrati MT, Young DP, Long GJ, Chan JY. Crystal Growth, Transport, and the Structural and Magnetic Properties of Ln4FeGa12 with Ln = Y, Tb, Dy, Ho, and Er. Inorg Chem 2009; 49:445-56. [DOI: 10.1021/ic9013202] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brenton L. Drake
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, Louisiana 70803
| | - Fernande Grandjean
- Department of Physics, B5, University of Liège, B-4000 Sart-Tilman, Belgium
| | - Michael J. Kangas
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, Louisiana 70803
| | - Edem K. Okudzeto
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, Louisiana 70803
| | - Amar B. Karki
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803
| | - Moulay T. Sougrati
- Department of Physics, B5, University of Liège, B-4000 Sart-Tilman, Belgium
| | - David P. Young
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803
| | - Gary J. Long
- Department of Chemistry, Missouri University of Science and Technology, University of Missouri, Rolla, Missouri 65409-0010
| | - Julia Y. Chan
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, Louisiana 70803
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Liang Y, Borrmann H, Baenitz M, Schnelle W, Budnyk S, Zhao JT, Grin Y. SnxPt4SnySb12−y: A Skutterudite with Covalently Bonded Filler. Inorg Chem 2008; 47:9489-96. [DOI: 10.1021/ic801154a] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Y. Liang
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany, State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academic of Sciences, Dingxi Road 1295, Shanghai 200050, P. R. China, and Graduate School of the Chinese Academy of Science, Beijing, P. R. China
| | - H. Borrmann
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany, State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academic of Sciences, Dingxi Road 1295, Shanghai 200050, P. R. China, and Graduate School of the Chinese Academy of Science, Beijing, P. R. China
| | - M. Baenitz
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany, State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academic of Sciences, Dingxi Road 1295, Shanghai 200050, P. R. China, and Graduate School of the Chinese Academy of Science, Beijing, P. R. China
| | - W. Schnelle
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany, State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academic of Sciences, Dingxi Road 1295, Shanghai 200050, P. R. China, and Graduate School of the Chinese Academy of Science, Beijing, P. R. China
| | - S. Budnyk
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany, State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academic of Sciences, Dingxi Road 1295, Shanghai 200050, P. R. China, and Graduate School of the Chinese Academy of Science, Beijing, P. R. China
| | - J. T. Zhao
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany, State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academic of Sciences, Dingxi Road 1295, Shanghai 200050, P. R. China, and Graduate School of the Chinese Academy of Science, Beijing, P. R. China
| | - Yu. Grin
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany, State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academic of Sciences, Dingxi Road 1295, Shanghai 200050, P. R. China, and Graduate School of the Chinese Academy of Science, Beijing, P. R. China
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Gumeniuk R, Schnelle W, Rosner H, Nicklas M, Leithe-Jasper A, Grin Y. Superconductivity in the platinum germanides MPt4Ge12 (M = rare-earth or alkaline-earth metal) with filled skutterudite structure. PHYSICAL REVIEW LETTERS 2008; 100:017002. [PMID: 18232807 DOI: 10.1103/physrevlett.100.017002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2007] [Indexed: 05/25/2023]
Abstract
New germanium-platinum compounds with the filled-skutterudite crystal structure were synthesized. The crystal structure and composition were investigated by x-ray diffraction and microprobe analysis. Magnetic susceptibility, specific heat, and electrical resistivity measurements evidence superconductivity in LaPt4Ge12 and PrPt4Ge12 below 8.3 K. The parameters of the normal and superconducting states were established. Strong coupling and a crystal electric field singlet ground state is found for the Pr compound. Electronic structure calculations show a large density of states at the Fermi level. Similar behavior with lower Tc was observed for SrPt4Ge12 and BaPt4Ge12.
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Affiliation(s)
- R Gumeniuk
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany
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Krishnamurthy VV, Lang JC, Haskel D, Keavney DJ, Srajer G, Robertson JL, Sales BC, Mandrus DG, Singh DJ, Bilc DI. Ferrimagnetism in EuFe4Sb12 due to the interplay of f-electron moments and a nearly ferromagnetic host. PHYSICAL REVIEW LETTERS 2007; 98:126403. [PMID: 17501140 DOI: 10.1103/physrevlett.98.126403] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2006] [Indexed: 05/15/2023]
Abstract
We combine x-ray magnetic circular dichroism spectroscopy at Fe L2,3 edges, at Eu M4,5 edges, x-ray absorption spectroscopy (XAS) investigation of Eu valence, and local spin density calculations, to show that the filled skutterudite Eu0.95Fe4Sb12 is a ferrimagnet in which the Fe 3d moment and the Eu2+ 4f moment are magnetically ordered with dominant antiferromagnetic coupling. From Eu L3 edge XAS, we find that about 13% of the Eu have a formal valence of 3+. We ascribe the origin of ferrimagnetism at a relatively high transition temperature TC of 85 K in Eu0.95Fe4Sb12 to f-electron interaction with the nearly ferromagnetic [Fe4Sb12]2.2- host lattice.
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Affiliation(s)
- V V Krishnamurthy
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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Sichelschmidt J, Voevodin V, Im HJ, Kimura S, Rosner H, Leithe-Jasper A, Schnelle W, Burkhardt U, Mydosh JA, Grin Y, Steglich F. Optical pseudogap from iron states in filled skutterudites AFe4Sb12 (A=Yb, Ca, Ba). PHYSICAL REVIEW LETTERS 2006; 96:037406. [PMID: 16486770 DOI: 10.1103/physrevlett.96.037406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2005] [Indexed: 05/06/2023]
Abstract
Optical investigations are presented of the filled skutterudites AFe4Sb12 with divalent cations A=Yb, Ca, Ba. For each of these compounds a very similar pseudogap structure in the optical conductivity develops in the far-infrared spectral region at temperatures below 90 K. Highly accurate local-density approximation electronic band structure calculations can consistently explain the origin of the pseudogap structure generated largely by transition metal 3d states. In particular, a 4f-conduction electron hybridization or strong correlations can be ruled out as origin for the pseudogap.
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Affiliation(s)
- J Sichelschmidt
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany
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