Flat/steep band model for superconductors containing Bi square nets
Flat/steep band model for superconductors containing Bi square nets
复制标题
包含 Bi 方网的超导体的平/陡带模型
DOI：
10.1515/znb-2019-0191
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发表时间：
2020
影响因子：
0.8
通讯作者：
Deng Shuiquan
中科院分区：
文献类型：
--
作者：
Fu Juntao;Xu Jing;Lin Jing;Koehler Juergen;Deng Shuiquan
本文评述了一类含有Bi方网的超导体的晶体结构及其在费米能级附近的电子结构。这些化合物的结构可以看作是堆叠层，用[Bi][(RE)(M2Bi2)(RE)]表示，RE=稀土或碱土金属，M=过渡金属。尽管配对机制可能非常不同，但所有这些新型超导体都显示出平坦/陡峭带的特征。对狄拉克费米子的行为进行了评述，并讨论了其意义。
The crystal structures of a new family of superconductors containing a Bi square net and their electronic structures around the Fermi level have been reviewed. The structures of these compounds can be viewed as stacked layers denoted by [Bi][(RE)(M2Bi2)(RE)] RE= rare earth or alkaline earth metal, M= transition metal. Flat/steep band features are shown to exist in all these new superconductors, though the pairing mechanisms may be very different. The Dirac Fermion behavior is reviewed and its implications are discussed.