SYMMETRY OF THE SUPERCONDUCTING ORDER-PARAMETER IN BI2SR2CACU2OX

被引:50
作者
KELLEY, RJ [1 ]
MA, J [1 ]
MARGARITONDO, G [1 ]
ONELLION, M [1 ]
机构
[1] ECOLE POLYTECH FED LAUSANNE,INST PHYS APPL,CH-1007 LAUSANNE,SWITZERLAND
关键词
D O I
10.1103/PhysRevLett.71.4051
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We analyzed the symmetry of the superconducting-phase condensate of Bi2Sr2CaCu2Ox with photoemission at high energy and angular resolution. The result unambiguously demonstrates that the photohole must include non-s-wave components. Under the hypothesis of a pure d-wave symmetry, this would be identified as d(xz) + d(yz). Our superconducting state data are, specifically, incompatible with pure d(x2-y2) symmetry. Mixed symmetries, however, cannot be excluded as long as they include a non-s-wave component. We specifically observe a change in the symmetry of electronic states between the normal state and the superconducting state.
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页码:4051 / 4054
页数:4
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