Zero-bias conductance vanishing induced by the same-spin-band Andreev reflection in half-metallic ferromagnet/superconductor contacts
C. D. Feng, Zhi Ming Zheng, R. Shen, Baigeng Wang, D. Y. Xing
DOI 10.1103/PhysRevB.81.224510 · Physical Review B
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Abstract
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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbTiN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| CrO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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