Superconductivity of Quasi-One- and Quasi-Two-Dimensional Tight-Binding Electrons in a Magnetic Field.
Superconductivity of Quasi-One- and Quasi-Two-Dimensional Tight-Binding Electrons in a Magnetic Field.
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磁场中准一维和准二维紧束缚电子的超导性。
DOI：
10.1143/jpsj.67.2618
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发表时间：
1998
影响因子：
1.7
通讯作者：
Y. Hasegawa
中科院分区：
文献类型：
--
作者：
M. Miyazaki;K. Kishigi;Y. Hasegawa
研究了三维晶格中紧束缚电子的上临界场H c2 ( T )。电子在强磁场中形成具有相同能量的本征态之间的库珀对。当忽略沿磁场的跳变矩阵元素时，准一维情况下的过渡线与先前获得的结果存在偏差。在没有泡利对破坏的情况下，准二维电子的转变温度 T c ( H ) 随着磁场变大而以振荡方式增加，并在强场中达到 T c (0)，如准一维情况。
The upper critical field H c2 ( T ) of tight-binding electrons in a three-dimensional lattice is investigated. The electrons form Cooper pairs between eigenstates with the same energy in a strong magnetic field. The transition lines in the quasi-one-dimensional case are shown to deviate from the previously obtained results when the hopping matrix elements along the magnetic field are neglected. In the absence of Pauli pair breaking the transition temperature T c ( H ) of the quasi-two-dimensional electrons is found to increase in an oscillatory manner as the magnetic field becomes large and to reach T c (0) in the strong field, as in the quasi-one-dimensional case.