Stability of Nodal Quasiparticles in Superconductors with Coexisting Orders

E. Berg; C-C. Chen; S. A. Kivelson

doi:10.1103/PhysRevLett.100.027003

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Stability of Nodal Quasiparticles in Superconductors with Coexisting Orders

E. Berg, C-C. Chen, S. A. Kivelson

DOI 10.1103/PhysRevLett.100.027003 · Physical Review Letters

T1

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Abstract

We establish a condition for the perturbative stability of zero energy nodal points in the quasiparticle spectrum of superconductors in the presence of coexisting commensurate orders. The nodes are found to be stable if the Hamiltonian is invariant under time reversal followed by a lattice translation. The principle is demonstrated with a few examples. Some experimental implications of various types of assumed order are discussed in the context of the cuprate superconductors.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown