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セガワ コウジ
SEGAWA KOJI
瀬川 耕司 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2011/03 |
| 形態種別 | 研究論文 |
| 標題 | Bulk Superconducting Phase with a Full Energy Gap in the Doped Topological Insulator CuxBi2Se3 |
| 執筆形態 | その他 |
| 掲載誌名 | PHYSICAL REVIEW LETTERS |
| 出版社・発行元 | AMER PHYSICAL SOC |
| 巻・号・頁 | 106(12) |
| 著者・共著者 | M. Kriener,Kouji Segawa,Zhi Ren,Satoshi Sasaki,Yoichi Ando |
| 概要 | The superconductivity recently found in the doped topological insulator CuxBi2Se3 offers a great opportunity to search for a topological superconductor. We have successfully prepared a single-crystal sample with a large shielding fraction and measured the specific-heat anomaly associated with the superconductivity. The temperature dependence of the specific heat suggests a fully gapped, strong-coupling superconducting state, but the BCS theory is not in full agreement with the data, which hints at a possible unconventional pairing in CuxBi2Se3. Also, the evaluated effective mass of 2.6m(e) (m(e) is the free electron mass) points to a large mass enhancement in this material. |
| DOI | 10.1103/PhysRevLett.106.127004 |
| ISSN | 0031-9007 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79952972929&origin=inward |