Nonlocal effects on the magnetic penetration depth in d-wave superconductors
Nonlocal effects on the magnetic penetration depth in d-wave superconductors
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DOI:
10.1103/physrevlett.79.135
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发表时间:
1997-07-07
影响因子:
8.6
通讯作者:
Leggett, AJ
中科院分区:
文献类型:
--
作者:
Kosztin, I;Leggett, AJ
We show that, under certain conditions, the low temperature behavior of the magnetic penetration depth lambda(Tau) of a pure d-wave superconductor is determined by nonlocal electrodynamics and, contrary to the general belief, the deviation Delta lambda(Tau) = lambda(Tau)- lambda(0) is proportional to Tau(2) and not Tau. We predict that the Delta lambda(Tau) alpha Tau(2) dependence, due to nonlocality, should be observable experimentally in nominally clean high-Tau(c), superconductors below a crossover temperature Tau(*) = (zeta(0)/lambda(0))Delta(0) similar to 1 K. Possible complications due to impurities, surface quality, and crystal axes orientation are discussed.