Superconductivity and non-Fermi liquid behavior near a nematic quantum critical point
Superconductivity and non-Fermi liquid behavior near a nematic quantum critical point
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DOI：
10.1073/pnas.1620651114
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发表时间：
2017-05-09
影响因子：
11.1
通讯作者：
Kivelson, Steven A.
中科院分区：
文献类型：
--
作者：
Lederer, Samuel;Schattner, Yoni;Kivelson, Steven A.
使用确定性量子蒙特卡洛，我们计算了带有量子12巡回电子的晶格模型的性质，该电子通过量子相变为伊斯林列相位。列的波动在超导TC中诱导超导性，封闭了列量量子临界点。对于高于TC的温度，我们看到了惊人的非纤维液体行为，包括“淋巴结 - 抗末端二分法”，让人联想到几种过渡金属氧化物中看到的液体行为。此外，临界波动对低频光导率具有很强的影响，从而导致行为与“不良金属”现象学一致。
Using determinantal quantum Monte Carlo, we compute the properties of a lattice model with spin 12 itinerant electrons tuned through a quantum phase transition to an Ising nematic phase. The nematic fluctuations induce superconductivity with a broad dome in the superconducting Tc enclosing the nematic quantum critical point. For temperatures above Tc, we see strikingly nonFermi liquid behavior, including a "nodal-antinodal dichotomy" reminiscent of that seen in several transition metal oxides. In addition, the critical fluctuations have a strong effect on the lowfrequency optical conductivity, resulting in behavior consistent with " bad metal" phenomenology.