期刊
PHYSICAL REVIEW B
卷 81, 期 22, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.224510
关键词
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资金
- State Key Program for Basic Research of China [2006CB921803, 2009CB929504, 2010CB923401]
The Blonder-Tinkham-Klapwijk approach is extended to study conductance spectra of half-metallic ferromagnet/s-wave superconductor contacts. It is found that a distinct Andreev reflection (AR) does exist in which the incident electron and the Andreev-reflected hole belong to the same-spin subband, provided that spin-flip scattering is present at the interface. The predicted distinguishing mark of the same-spin-band AR is the zero-bias conductance vanishing and finite V-shape conductance within the energy gap. Its experimental observation will provide a conclusive proof for the same-spin-band AR and also a best judgement about the half-metallic ferromagnet.
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