Thermal conductivity across a twin boundary in a d-wave superconductor

M. E. Zhitomirsky; M. B. Walker

doi:10.1103/PhysRevB.57.8560

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Thermal conductivity across a twin boundary in a d-wave superconductor

M. E. Zhitomirsky, M. B. Walker

DOI 10.1103/PhysRevB.57.8560 · Physical Review B

T1

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Abstract

We consider the electronic excitation spectrum near a twin boundary in an orthorhombic d+s superconductor. The low-energy spectrum is highly sensitive to the presence of a small amount of s-wave component. Robustness of the bound states at the Fermi level with respect to impurities and an extra boundary potential is investigated. The role of the Andreev transmission process for the low-temperature thermal conductivity across twin boundaries is studied for an impure superconductor. At very low temperatures the bulk part and the twin-boundary part of the thermal conductivity have similar linear-T dependences, whereas at intermediate temperatures the two contributions behave like T3 and T2, respectively.

Source-reported materials — not catalogue approval

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