| Item type |
itemtype_ver1(1) |
| 公開日 |
2021-10-15 |
| タイトル |
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|
タイトル |
Ambient-pressure Dirac electron system in the quasi-two-dimensional molecular conductor α−(BETS)2I3 |
|
言語 |
en |
| 著者 |
Kitou, Shunsuke
Tsumuraya, Takao
Sawahata, Hikaru
Ishii, Fumiyuki
Hiraki, Ko-ichi
Nakamura, Toshikazu
Katayama, Naoyuki
Sawa, Hiroshi
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| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利 |
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|
言語 |
en |
|
権利情報 |
© 2021 American Physical Society |
| 内容記述 |
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内容記述タイプ |
Abstract |
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内容記述 |
We investigated the precise crystal structures and electronic states of a quasi-two-dimensional molecular conductor α−(BETS)2I3 at ambient pressure. The electronic resistivity of this molecular solid shows metal-to-insulator (MI) crossover behavior at TMI=50K. Our x-ray diffraction and 13C nuclear magnetic resonance experiments revealed that α−(BETS)2I3 maintains the inversion symmetry below TMI. First-principles calculations found a pair of anisotropic Dirac cones at a general k point, with the degenerate contact points at the Fermi level. The origin of the insulating state in this system is a small energy gap of ∼2meV opened by the spin-orbit interaction. The Z2 topological invariants indicate that this system is a weak topological insulator. Our results suggest that α−(BETS)2I3 is a promising material for studying the bulk Dirac electron system in two dimensions. |
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言語 |
en |
| 出版者 |
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出版者 |
American Physical Society |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
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|
資源タイプresource |
http://purl.org/coar/resource_type/c_6501 |
|
タイプ |
journal article |
| 出版タイプ |
|
|
出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
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|
関連タイプ |
isVersionOf |
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識別子タイプ |
DOI |
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|
関連識別子 |
https://doi.org/10.1103/PhysRevB.103.035135 |
| 収録物識別子 |
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収録物識別子タイプ |
PISSN |
|
収録物識別子 |
2469-9950 |
| 書誌情報 |
en : Physical Review B
巻 103,
p. 035135,
発行日 2021-01-15
|
PhysRevB_103_035135.pdf (1.6 MB)
