Phys. Rev. Lett. 83, 5326–5329 (1999)Andreev Reflection and Spin Injection into s- and d-Wave SuperconductorsReceived 19 January 1999; published in the issue dated 20 December 1999 We study the effect of spin injection into s- and d-wave superconductors. The quantities of interest include the amount of injected magnetization ( m), the induced spin-dependent current ( Is), and boundary voltage ( Vs). In general, Andreev reflection makes each of the three quantities depend on a different combination of the boundary and bulk contributions. We identify the conditions under which some of these quantities depend solely on the bulk properties. We also establish a correlation between the Andreev bound states and the spin-injection characteristics, which implies a strong directional dependence of spin injection into high temperature superconductors. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.5326
DOI:
10.1103/PhysRevLett.83.5326
PACS:
71.10.Hf, 71.27.+a, 72.15.Gd, 74.25.Fy
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