標題: Two-gap feature in optimally electron-doped cuprates
作者: Hu, Wei
Feng, Zhongpei
Yuan, Jie
Xiang, Tao
Li, Dingping
Rosenstein, Baruch
Zhu, Beiyi
Jin, Kui
電子物理學系
Department of Electrophysics
公開日期: 19-Sep-2019
摘要: The dependence of the Hall conductivity on temperature and magnetic field in optimally doped La2-xCexCuO4 +/-delta (x = 0.105) thin films demonstrates that both the hole and the electron bands undergo Cooper pairing. The magnetic field suppresses the dominant hole band pairing more effectively, making the subdominant electron band pairing visible. Positively charged Cooper pairs dominate the Hall signal in the mixed state at a weak magnetic field near T-c, while at large field the negatively charged Cooper pairs take over. Sign reversals of the Hall conductivity induced by superconducting fluctuation occur in the transition and can be explained by a weakly coupled two-band Ginzburg-Landau-Lawrence-Doniach model.
URI: http://dx.doi.org/10.1103/PhysRevB.100.094524
http://hdl.handle.net/11536/152797
ISSN: 2469-9950
DOI: 10.1103/PhysRevB.100.094524
期刊: PHYSICAL REVIEW B
Volume: 100
Issue: 9
起始頁: 0
結束頁: 0
Appears in Collections:Articles