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篇目详细内容 |
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【篇名】 |
Local density of states around two nonmagnetic impurities in cuprate superconductors |
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【刊名】 |
Frontiers of Physics |
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【刊名缩写】 |
Front. Phys |
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【ISSN】 |
2095-0462 |
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【EISSN】 |
2095-0470 |
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【DOI】 |
10.1007/s11467-011-0183-2 |
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【出版社】 |
Higher Education Press and Springer-Verlag Berlin
Heidelberg |
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【出版年】 |
2011 |
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【卷期】 |
6
卷3期 |
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【页码】 |
309-312
页,共
4
页 |
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【作者】 |
Zhan-peng HUANG;
Xia-xia WAN;
Feng YUAN;
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【关键词】 |
local density of states (LDOS); nonmagnetic impurities; Gutzwiller approximation |
【摘要】 |
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The local density of states (LDOS) around two nonmagnetic impurities which are located at different sites is studied within the two-dimensional t–J–U model. The order parameters are determined in a self-consistent way with the Gutzwiller projected mean-field approximation and the Bogoliubov–de Gennes theory. When the two impurities are located one or two sites away, we find the superconductivity coherence peaks are more strongly suppressed and the zero-energy peak (ZEP) has split into two peaks. Whereas when the two impurities are located next to each other, the ZEP vanished, and LDOS does not change a lot compared with the case away from the impurities. |
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