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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 | 2014/09/10 |
| 形態種別 | 研究論文 |
| 標題 | Doping-dependent charge dynamics in Cux Bi2 Se3 |
| 執筆形態 | その他 |
| 掲載誌名 | Physical Review B - Condensed Matter and Materials Physics |
| 出版社・発行元 | American Physical Society |
| 巻・号・頁 | 90(9) |
| 著者・共著者 | Luke J. Sandilands,Anjan A. Reijnders,Markus Kriener,Kouji Segawa,Satoshi Sasaki,Yoichi Ando,Kenneth S. Burch |
| 概要 | Superconducting CuxBi2Se3 has attracted significant attention as a candidate topological superconductor. Besides inducing superconductivity, the introduction of Cu atoms to this material has also been observed to produce a number of unusual features in DC transport and magnetic susceptibility measurements. To clarify the effect of Cu doping, we have performed a systematic optical spectroscopic study of the electronic structure of CuxBi2Se3 as a function of Cu doping. Our measurements reveal an increase in the conduction band effective mass, while both the free carrier density and lifetime remain relatively constant for Cu content greater than x=0.15. The increased mass naturally explains trends in the superfluid density and residual resistivity as well as hints at the complex nature of Cu doping in Bi2Se3. |
| DOI | 10.1103/PhysRevB.90.094503 |
| ISSN | 1550-235X |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84985000602&origin=inward |