Effect of coexisting order of various form and wave vector on low-temperature thermal conductivity in d-wave superconductors - Condensed Matter > SuperconductivityReport as inadecuate




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Abstract: In light of recent experimental evidence of density wave order in thecuprates, we consider a phenomenological model of a d-wave superconductor withcoexisting charge, spin or pair density wave order of various form and wavevector. We study the evolution of the nodal structure of the quasiparticleenergy spectrum as a function of the amplitude of the coexisting order andperform diagrammatic linear response calculations of the low-temperatureuniversal-limit thermal conductivity. The work described herein expands uponour past studies, which focused on a particular unit-cell-doubling chargedensity wave, generalizing our techniques to a wider class of coexisting order.We find that the question of whether the nodes of the d-wave superconductorsurvive amidst a reasonable level of coexisting order is sensitive to the formand wave vector of the order. However, in cases where the nodes do becomegapped, we identify a signature of the approach to this nodal transition, inthe low-temperature thermal conductivity, that appears to be quite general. Theamplitude of this signature is found to be disorder-dependent, which suggests aconnection between the presence of coexisting order in the underdoped cupratesand recent observations of deviations from universal disorder-independentthermal conductivity in the underdoped regime.



Author: Philip R. Schiff, Adam C. Durst

Source: https://arxiv.org/







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