科研之友
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摘要
The Blonder-Tinkham-Klapwijk approach is exploited to study the conductance spectrum in ferromagnet(F)/d-wave superconductor(S) junctions with a transverse supercurrent in S. In the absence of exchange energy with (110) contact (alpha = pi/4), when the supercurrent q not equal 0.0, we find that the conductance coherence peaks split into subpeaks at Z = 0.5 and 1.0. The energy difference between the two subpeaks corresponding to a single coherence peak is found to increase as the supercurrent increases. For the F/S junctions with (110) contact at Z = 0.5 and 1.0, when the supercurrent q not equal 0.0 the subpeaks split again: in this the exchange energy plays a dominant role, similar to the Zeeman effect. At certain values of h(0)/E(F), we found that the two Zeeman-like peaks around zero energy could merge into a single one.
- 出版日期2008-8-20
- 单位北京大学; 北京应用物理与计算数学研究所; 北京师范大学
