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| ファイル | 記述 | サイズ | フォーマット | |
|---|---|---|---|---|
| PhysRevResearch.4.023232.pdf | 665.12 kB | Adobe PDF | 見る/開く |
| タイトル: | Superconductivity in monolayer FeSe enhanced by quantum geometry |
| 著者: | Kitamura, Taisei Yamashita, Tatsuya Ishizuka, Jun Daido, Akito    https://orcid.org/0000-0003-4629-7818 (unconfirmed)Yanase, Youichi |
| 著者名の別形: | 北村, 泰晟 山下, 達也 大同, 暁人 栁瀬, 陽一 |
| キーワード: | BKT transition Meissner effect Multiband superconductivity Penetration depth Superfluid density High-temperature superconductors Iron-based superconductors Monolayer films BCS theory Bloch wave theory First-principles calculations Mean field theory Condensed Matter, Materials & Applied Physics |
| 発行日: | Jun-2022 |
| 出版者: | American Physical Society (APS) |
| 誌名: | Physical Review Research |
| 巻: | 4 |
| 号: | 2 |
| 論文番号: | 023232 |
| 抄録: | We formulate the superfluid weight in unconventional superconductors with k-dependent Cooper pair potentials based on the geometric properties of Bloch electrons. We apply the formula to a model of monolayer FeSe obtained by first-principles calculation. Our numerical calculations point to a significant enhancement of the Berezinskii-Kosterlitz-Thouless transition temperature due to the geometric contribution to the superfluid weight, which is not included in the Fermi liquid theory. The k dependence of the gap function also stabilizes the superconducting state. Our results reveal that the geometric properties of Bloch electrons play an essential role in superconducting materials and pave the way for clarifying hidden aspects of superconductivity from the viewpoint of quantum geometry. |
| 著作権等: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. |
| URI: | http://hdl.handle.net/2433/278243 |
| DOI(出版社版): | 10.1103/PhysRevResearch.4.023232 |
| 出現コレクション: | 学術雑誌掲載論文等 |
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