Sixfold enhancement of superconductivity in a tunable electronic nematic system.

ABSTRACT: The electronic nematic phase-in which electronic degrees of freedom lower the crystal rotational symmetry-is commonly observed in high-temperature superconductors. However, understanding the role of nematicity and nematic fluctuations in Cooper pairing is often made more complicated by the coexistence of other orders, particularly long-range magnetic order. Here we report the enhancement of superconductivity in a model electronic nematic system that is not magnetic, and show that the enhancement is directly born out of strong nematic fluctuations associated with a quantum phase transition. We present measurements of the resistance as a function of strain in Ba_1-x Sr _x Ni₂As₂ to show that strontium substitution promotes an electronic

SUBMITTER: Eckberg C 

PROVIDER: S-EPMC7836097 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature