Raman spectrum in the pseudogap phase of the underdoped cuprates: effect of phase coherence and the signature of the KT-type superconducting transition
Raman spectrum in the pseudogap phase of the underdoped cuprates: effect of phase coherence and the signature of the KT-type superconducting transition
复制标题
欠掺杂铜酸盐赝能隙相的拉曼光谱：相位相干效应和 KT 型超导转变的特征
DOI：
10.1088/0953-8984/23/46/464201
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发表时间：
2011-11
期刊：
影响因子：
--
通讯作者：
Liao, Haijun
中科院分区：
文献类型：
--
作者：
Li, Tao;Liao, Haijun
在相位自由度为XY型晶格模型的热相位涨落情形下，研究了欠掺杂铜氧化物的拉曼光谱的温度演化。研究发现，对破缺拉曼峰敏感地依赖于对序参量的相位相干性。结果表明，当涡旋状相位起伏增大时，B1 g和B2 g通道的积分拉曼强度在Kosterlitz-Less（KT）转变温度（TKT）上都有显著下降。这一结果，这是一致的实验观察，提供了进一步的支持的热相位波动的赝隙相和KT型的性质，在欠掺杂铜氧化物的超导转变的情况。
The temperature evolution of the Raman spectrum of the underdoped cuprates is studied in the thermal phase fluctuation scenario with an XY-type lattice model for the phase degree of freedom. It is found that the pair breaking Raman peak depends sensitively on the phase coherence of the pairing order parameter. As a result, the integrated Raman intensity in both the B1g and the B2g channels exhibits a dramatic drop across the Kosterlitz–Thouless (KT) transition temperature (TKT), when vortex-like phase fluctuation is proliferated. This result, which is consistent with experimental observations, provides further support for the thermal phase fluctuation scenario of the pseudogap phase and the KT-type nature of the superconducting transition in underdoped cuprates.
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影响因子：
19.6
作者：
Le Tacon, M.;Sacuto, A.;Forget, A.
通讯作者：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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