Charged vortices in high-temperature superconductors probed by NMR

Kumagai, Ken-ichi; Nozaki, Koji; Matsuda, Yuji

PHYSICAL REVIEW B, 2001, 63, 144502

Permalink : https://hdl.handle.net/2115/5892

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アクセス権	open access
URI	https://hdl.handle.net/2115/5892
タイトル	Charged vortices in high-temperature superconductors probed by NMR
著者	Kumagai, Ken-ichi ; Nozaki, Koji ; Matsuda, Yuji
e-Rad_Researcher 70029560 著者名 Kumagai, Ken-ichi 熊谷, 健一
著者名 Nozaki, Koji
著者名 Matsuda, Yuji
言語	英語
発行日	2001
出版者	American Physical Society
収録物名	PHYSICAL REVIEW B
巻(号)	63
ページ	144502
抄録	We report experimental evidence that a vortex in high-temperature superconductors (HTSC) traps a finite electric charge from the high-resolution measurements of the nuclear quadrupole frequencies. In slightly overdoped YBa2Cu3O7 the vortex is negatively charged by trapping electrons, while in underdoped YBa2Cu4O8 it is positively charged by expelling electrons. The sign of the trapped charge is opposite to the sign predicted by the conventional BCS theory. Moreover, in both materials, the deviation of the magnitude of charge from the theory is also significant. These unexpected features can be attributed to the electronic structure of the vortex in HTSC.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Copyright © 2001 American Physical Society
PISSN	0163-1829
関連情報	URI http://www.aps.org/
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1103/PhysRevB.63.144502