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Dichotomy and pseudogap signature in the Raman response of high-T_c cuprates

机译:高T_c铜酸盐拉曼响应中的二分法和伪间隙签名。

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摘要

The signature of the pseudogap in the normal-state Raman response of high-T_c cuprates is examined within the rotating antiferromagnetism theory. The results for the B_(1g) and B_(2g) response functions, including spectral weight transfer and quasiparticle's dichotomy, compare well with experiment. A pseudogap-induced peak in the B_(1g) response is found to behave like the superconducting peak; the low-frequency B_(1g) response behaves as ω~a with a~3 in the clean limit, and a=1 in the dirty limit. Also, we find that the zero-frequency slopes for both B_(1g) and B_(2g) scale as the inverse (inverse squared) of the zero-frequency scattering rate in the clean limit (dirty limit).
机译:在旋转反铁磁理论中,研究了高T_c铜酸盐在正常状态拉曼响应中伪间隙的签名。 B_(1g)和B_(2g)响应函数的结果,包括光谱权重转移和准粒子二分法,与实验结果相比较。发现B_(1g)响应中由伪间隙引起的峰的行为类似于超导峰。低频B_(1g)响应表现为ω〜a,清洁极限为a〜3,脏极限为a = 1。此外,我们发现B_(1g)和B_(2g)的零频率斜率在零污染极限(脏极限)中与零频率散射率的倒数(反平方)成比例。

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