Observation of vortices and hidden pseudogap from scanning tunneling spectroscopic studies of the electron-doped cuprate superconductor Sr0.9La0.1CuO2

被引：17
作者：
Teague, M. L. [1 ]
Beyer, A. D. [1 ]
Grinolds, M. S. [1 ]
Lee, S. I. [2 ]
Yeh, N. -C. [1 ]
机构：
[1] CALTECH, Dept Phys, Pasadena, CA 91125 USA
[2] Sogang Univ, Dept Phys, Natl Creat Res Initiat, Ctr Superconduct, Seoul 121742, South Korea
来源：
EPL | 2009年 / 85卷 / 01期
关键词：
LOW-ENERGY EXCITATIONS; COMPETING ORDERS; VORTEX CORES; STATES; FLUCTUATIONS; DYNAMICS; SURFACE;
D O I：
10.1209/0295-5075/85/17004
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present the first demonstration of vortices in an electron-type cuprate superconductor, the highest T-c(=43 K) electron- type cuprate Sr0.9La0.1CuO2. Our spatially resolved quasiparticle tunneling spectra reveal a hidden low-energy pseudogap inside the vortex core and unconventional spectral evolution with temperature and magnetic field. These results cannot be easily explained by the scenario of pure superconductivity in the ground state of high-T-c superconductivity. Copyright (C) EPLA, 2009
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页数：6
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