Suppression of superconductivity at a nematic critical point in underdoped cuprates
Suppression of superconductivity at a nematic critical point in underdoped cuprates
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欠掺杂铜酸盐向列临界点超导性的抑制
DOI：
10.1103/physrevb.85.174525
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发表时间：
2011-11
影响因子：
3.7
通讯作者：
Jing Wang
中科院分区：
文献类型：
--
作者：
Guo-Zhu Liu;Jing-Rong Wang;Jing Wang
在某些高温超导体的超导圆顶中，可能存在一个量子临界点。超导序与超导序竞争，从而减少了T = 0时的超导凝聚。此外，三阶临界涨落可以激发出凝聚体中更多的节状准粒子。我们在有效场论中讨论了这两种效应，并表明超流密度和超导温度都受到临界涨落的强烈抑制。超导电性的强抑制提供了一种可能的方法来确定量子临界点。
A nematic quantum critical point is anticipated to exist in the superconducting dome of some high-temperature superconductors. The nematic order competes with the superconducting order and hence reduces the superconducting condensate at $T = 0$. Moreover, the critical fluctuations of nematic order can excite more nodal quasiparticles out of the condensate. We address these two effects within an effective field theory and show that superfluid density $\rho^s(T)$ and superconducting temperature $T_c$ are both suppressed strongly by the critical fluctuations. The strong suppression of superconductivity provides a possible way to determine the nematic quantum critical point.