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Insulator-metal transition in TiGePt: A combined photoelectron spectroscopy, x-ray absorption spectroscopy, and band structure study

Gegner, J. and Gamza, M. and Ackerbauer, S.-V. and Hollmann, N. and Hu, Z. and Hsieh, H.-H. and Lin, H.-J. and Chen, C.-T. and Ormeci, A. and Leithe-Jasper, A. and Rosner, H. and Grin, Yu. and Tjeng, L.H. (2012) Insulator-metal transition in TiGePt: A combined photoelectron spectroscopy, x-ray absorption spectroscopy, and band structure study. Physical Review B, 85 (23), p. 235106. American Physical Society.

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Official URL: http://link.aps.org/doi/10.1103/PhysRevB.85.235106

Abstract

We present a combined experimental and theoretical study of the electronic structure of the intermetallic compound TiGePt by means of photoelectron spectroscopy, x-ray absorption spectroscopy, and full potential band structure calculations. It was recently shown [ S.-V. Ackerbauer et al. Chemistry - a European Journal 18 6272 (2012)] that TiGePt undergoes a structural phase transition by heating which is accompanied by a large volume contraction and a drastic change of physical properties, in particular a large decrease of the electrical resistivity. The present study revealed substantial differences in the electronic structure for the two TiGePt modifications, although they have the same nominal composition and show similar electron counts for particular valence band states. Our photoemission experiments and band structure calculations establish that an insulator-to-metal transition occurs with an appreciable band broadening and closing of the band gap.

Item URL in elib:https://elib.dlr.de/80460/
Document Type:Article
Title:Insulator-metal transition in TiGePt: A combined photoelectron spectroscopy, x-ray absorption spectroscopy, and band structure study
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gegner, J.jan.gegner (at) dlr.deUNSPECIFIED
Gamza, M.Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, GermanyUNSPECIFIED
Ackerbauer, S.-V.Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, GermanyUNSPECIFIED
Hollmann, N.Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, GermanyUNSPECIFIED
Hu, Z.Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, GermanyUNSPECIFIED
Hsieh, H.-H.Chung Cheng Institute of Technology, National Defense University, Taoyuan 335, TaiwanUNSPECIFIED
Lin, H.-J.National Synchrotron Radiation Research Center (NSRRC), 101 Hsin-Ann Road, Hsinchu 30077, TaiwanUNSPECIFIED
Chen, C.-T.National Synchrotron Radiation Research Center (NSRRC), 101 Hsin-Ann Road, Hsinchu 30077, TaiwanUNSPECIFIED
Ormeci, A.Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, GermanyUNSPECIFIED
Leithe-Jasper, A.Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, GermanyUNSPECIFIED
Rosner, H.Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, GermanyUNSPECIFIED
Grin, Yu.Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, GermanyUNSPECIFIED
Tjeng, L.H.Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, 01187 Dresden, GermanyUNSPECIFIED
Date:4 June 2012
Journal or Publication Title:Physical Review B
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:85
Page Range:p. 235106
Publisher:American Physical Society
Status:Published
Keywords:photoelectron spectroscopy, x-ray absorption spectroscopy, electronic structure, full potential band structure calculations, insulator-to-metal transition
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Vorhaben Materialforschung unter Mikro-g (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Scientific Experiments MP
Deposited By: Gegner, Jan
Deposited On:11 Jan 2013 08:59
Last Modified:06 Sep 2019 15:29

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