Superconductor–insulator transition in under-doped cuprates
作者： T. Fujita , J. Hori , S. Iwata , Y. Yoshino , H. Kurisaki
DOI: 10.1016/S0921-4534(01)00771-7
关键词: Superconductivity 、 Materials science 、 Anisotropy 、 Superconductor Insulator Transition 、 Condensed matter physics 、 Cuprate 、 Tetragonal crystal system 、 Orthorhombic crystal system 、 Electrical resistivity and conductivity 、 Transition temperature
摘要: Abstract The superconducting transition was investigated in under-doped La2−xSrxCuO4 (LSCO) single crystals under anisotropic pressure. With decreasing x, the temperature Tc found to drop discontinuously from a finite value zero around xc≈0.05 tetragonal lattice of LSCO, while is well known decrease continuously and disappear at x≈0.06 orthorhombic phase ambient change LSCO across xc looks like first-order as electron-doped Nd2−xCexCuO4 shows vicinity x=0.14. In doped just above xc, superconductor–insulator also expected sample by compressing along c-axis. between magnetic insulating closely related in-plane resistivity or two-dimensional character electronic state.
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