Self-masking of spontaneous symmetry breaking in layer materials

Abstract

We study d-wave Fermi surface deformations (dFSD), the so-called Pomeranchuk instability, on bilayer and infinite-layer square lattices. Since the order parameter of the dFSD has Ising symmetry, there are two stacking patterns along the c axis: (+,+) and (+,-). We find that, as long as the c axis dispersion is finite at the saddle points of the in-plane band dispersion, the (+,-) stacking is usually favored independently on the details of interlayer coupling, yielding no macroscopic anisotropy. The dFSD provides unique spontaneous symmetry breaking that is self-masked in layer materials.

arXiv comment5 pages, 3 figures, published version

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• Magnetoelectric Response in Electric Octupole State: Possible Hidden Order in Cuprate Superconductors
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