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Superconductivity and non-Fermi liquid behavior near a nematic quantum critical point.

ABSTRACT: Using determinantal quantum Monte Carlo, we compute the properties of a lattice model with spin [Formula: see text] 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 [Formula: see text] enclosing the nematic quantum critical point. For temperatures above [Formula: see text], we see strikingly non-Fermi 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 low-frequency optical conductivity, resulting in behavior consistent with "bad metal" phenomenology.

SUBMITTER: Lederer S

PROVIDER: S-EPMC5441715 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature

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Superconductivity and non-Fermi liquid behavior near a nematic quantum critical point.

Lederer Samuel S Schattner Yoni Y Berg Erez E Kivelson Steven A SA

Proceedings of the National Academy of Sciences of the United States of America 20170424 19

Using determinantal quantum Monte Carlo, we compute the properties of a lattice model with spin [Formula: see text] 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 [Formula: see text] enclosing the nematic quantum critical point. For temperatures above [Formula: see text], we see strikingly non-Fermi liquid behavior, including a "nodal-antinodal dichotomy" reminiscen ...[more]

PMID: 28439023

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