Variation of shear moduli across superconducting phase transitions

Abstract

We study how shear moduli of a correlated metal change across superconducting phase transitions. Using a microscopic theory we explain why for most classes of superconductors this change is small. The Fe-based and the A15 systems are notable exceptions where the change is boosted by five orders of magnitude. We show that this boost is a consequence of enhanced nematic correlation. The theory explains the unusual temperature dependence of the orthorhombic shear and the back-bending of the nematic transition line in the superconducting phase of the Fe-based systems.

arXiv comment5 pages, 3 Figures

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Cited by in corpus (4)

• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Enhanced superconducting pairing strength near a nonmagnetic nematic quantum critical point
• Nematicity and superconductivity: Competition versus cooperation
• Nematic fluctuations mediated superconductivity revealed by anisotropic strain in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$