Nonlocal Effects on the Magnetic Penetration Depth ind-Wave Superconductors

1997/02/21 by Ioan Kosztin, Anthony J. Leggett · 11 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Iron-based superconductors research #Physics of Superconductivity and Magnetism #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.79.135

published as Phys. Rev. Lett. 79, 135 (1997) · REVTeX3.0; 4 pages, 1 EPS figure (included); Submitted to Phys. Rev. Lett

arxiv created 1997/02/21 · openalex publication_date 1997/07/07 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We show that, under certain conditions, the low temperature behavior of the magnetic penetration depth \ensuremathλ(T) of a pure d-wave superconductor is determined by nonlocal electrodynamics and, contrary to the general belief, the deviation \ensuremathΔ\ensuremathλ(T)\phantom\rule0ex0ex=\phantom\rule0ex0ex\ensuremathλ(T)\ensuremath-\ensuremathλ(0) is proportional to T² and not T. We predict that the \ensuremathΔ\ensuremathλ(T)\ensuremath∝T² dependence, due to nonlocality, should be observable experimentally in nominally clean high- T_c superconductors below a crossover temperature T^*\phantom\rule0ex0ex=\phantom\rule0ex0ex(\ensuremathξ₀/\ensuremathλ₀)\ensuremathΔ₀\ensuremath∼1 K. Possible complications due to impurities, surface quality, and crystal axes orientation are discussed.

Citations

• Phenomenological theory of unconventional superconductivity

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