期刊
PHYSICAL REVIEW LETTERS
卷 89, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.89.177004
关键词
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Electronic Raman scattering in high-T-c superconductors is studied within the t-J model. It is shown that the A(1g) and B-1g spectra are dominated by amplitude fluctuations of the superconducting and the d charge-density-wave order parameters, respectively. The B-2g spectrum contains no collective effects and its broad peak reflects vaguely the doping dependence of T-c, similarly to the pronounced peak in the A(1g) spectrum. The agreement of our theory with the experiment supports the picture of two different, competing order parameters in the underdoped regime of high-T-c superconductors.
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