Nonlocal Effects on the Magnetic Penetration Depth in {ital d}-Wave Superconductors
- Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801 (United States)
We show that, under certain conditions, the low temperature behavior of the magnetic penetration depth {lambda}(T) of a pure d -wave superconductor is determined by nonlocal electrodynamics and, contrary to the general belief, the deviation {Delta}{lambda}(T)={lambda}(T){minus}{lambda} (0) is proportional to T{sup 2} and not T . We predict that the {Delta}{lambda}(T){proportional_to}T{sup 2} dependence, due to nonlocality, should be observable experimentally in nominally clean high-T{sub c} superconductors below a crossover temperature T{sup *}=({xi}{sub 0}/{lambda}{sub 0}){Delta}{sub 0}{approximately}1 K. Possible complications due to impurities, surface quality, and crystal axes orientation are discussed. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 549688
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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