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Tytuł:
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Thermodynamic evidence of magnetic-field-induced complete valley polarization in bismuth.
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Autorzy:
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Iwasa A; Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba, 277-8581, Japan. .
Kondo A; Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba, 277-8581, Japan.
Kawachi S; Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba, 277-8581, Japan.
Akiba K; Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba, 277-8581, Japan.
Nakanishi Y; Graduate School of Arts and Science, Iwate University, Morioka, Iwate, 020-8551, Japan.
Yoshizawa M; Graduate School of Arts and Science, Iwate University, Morioka, Iwate, 020-8551, Japan.
Tokunaga M; Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba, 277-8581, Japan. .
Kindo K; Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, Chiba, 277-8581, Japan.
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Źródło:
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Scientific reports [Sci Rep] 2019 Feb 08; Vol. 9 (1), pp. 1672. Date of Electronic Publication: 2019 Feb 08.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: London : Nature Publishing Group, copyright 2011-
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References:
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Entry Date(s):
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Date Created: 20190210 Latest Revision: 20200225
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Update Code:
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20240105
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PubMed Central ID:
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PMC6368639
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DOI:
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10.1038/s41598-018-38206-x
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PMID:
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30737424
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We investigated the fundamental physical properties in the ultra-quantum limit state of bismuth through measurements of magnetoresistance, magnetization, magnetostriction, and ultrasound attenuation in magnetic fields up to 60T. For magnetic fields applied along the bisectrix direction of a single crystal, a drastic sign reversal in magnetostriction was observed at approximately 39T, which could be ascribed to the complete valley polarization in the electron Fermi pockets. The application of magnetic fields along the binary direction presented an anomalous feature at approximately 50T only in the magnetoresistance. The emergence of a field-induced splitting of a valley was proposed as a possible origin of this anomaly.
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