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Variation of zero-energy density of states of a d-wave superconductor in a rotating in-plane magnetic field: Effect of nonmagnetic impurities

Yuuki Hashitani, Kenta K. Tanaka, Hiroto Adachi, and Masanori Ichioka
Phys. Rev. B 101, 060501(R) – Published 7 February 2020
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Abstract

Oscillation of zero-energy density of states under the rotation of an in-plane magnetic field is used to identify node positions of the superconducting gap. Based on Eilenberger theory that can capture the vortex core contribution appropriately, we quantitatively study the effects of nonmagnetic impurity scattering on the oscillation in a dx2y2-wave superconductor, as a function of the magnetic field and the scattering rate in the Born and the unitary limits. We find that the sign of the oscillation can be changed by the impurity scattering at low fields, indicating that impurity effect is an important factor in the analysis of angle-resolved specific heat measurements.

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  • Received 29 July 2019
  • Revised 18 November 2019
  • Accepted 22 January 2020

DOI:https://doi.org/10.1103/PhysRevB.101.060501

©2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Yuuki Hashitani1, Kenta K. Tanaka1, Hiroto Adachi1,2, and Masanori Ichioka1,2

  • 1Department of Physics, Okayama University, Okayama 700-8530, Japan
  • 2Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan

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Issue

Vol. 101, Iss. 6 — 1 February 2020

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