On edge states in superconductor with time inversion symmetry breaking
On edge states in superconductor with time inversion symmetry breaking
复制标题
时间反演对称性破缺的超导体边缘态
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
G. E. Volovik
中科院分区：
文献类型：
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作者：
G. E. Volovik
讨论了层状高温超导材料中不同内部拓扑结构的超导态。如果时间反演对称性被破坏，超导性不仅由超导态的对称性决定，而且还由基态的拓扑结构决定。后者由整值动量空间拓扑不变量N决定。考虑了不同N（N_2和N_1）畴间的载流边界。电流是由费米子零模产生的，每层的费米子零模数为2（N_2-N_1）。
Superconducting states with different internal topology are discussed for the layered high-T_c materials. If the time inversion symmetry is broken, the superconductivity is determined not only by the symmetry of the superconducting state, but also by the topology of the ground state. The latter is determined the integer-valued momentum-space topological invariant N. The current carrying boundary between domains with different N (N_2 and N_1) is considered. The current is produced by fermion zero modes, which number per one layer is 2(N_2-N_1).