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arXiv 1609.02720cond-mat.supr-con
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~ 3 He-B中杂质对表面Majorana费米子的散射理论

Scattering theory on surface Majorana fermions by an impurity in 3He-B

Yasumasa Tsutsumi

摘要:

本文建立了超流$^3$ He B相($^3$ He-B)表面束缚态中Majorana费米子被杂质散射理论。通过将该理论应用于被认为是杂质的电子泡,捕获在$^3$ He-B的自由表面下方,观察到的电子泡的迁移率[Ikegami等人,日本物理学会杂志82,124607(2013)]定量再现。在低温下,由于表面马约拉纳费米子的贡献,体$^3$ He-B的迁移率被抑制在预期值之外。与此相反,迁移率不依赖于电子泡的捕获深度,尽管表面马约拉纳费米子的波函数的空间变化。我们制定的理论表明,考虑在散射过程中的中间状态的深度无关的流动性。因此,我们认为实验成功地观测到了表面束缚态的马约拉纳费米子。

英文摘要:

We have formulated the scattering theory on Majorana fermions emerging in the surface bound state of the superfluid $^3$He B-phase ($^3$He-B) by an impurity. By applying the theory to the electron bubble, which is regarded as the impurity, trapped below a free surface of $^3$He-B, the observed mobility of the electron bubble [Ikegami et al., J. Phys. Soc. Jpn. 82, 124607 (2013)] is quantitatively reproduced. The mobility is suppressed in low temperatures from the expected value in the bulk $^3$He-B by the contribution from the surface Majorana fermions. By contrast, the mobility does not depend on trapped depth of the electron bubble in spite of the spatial variation of the wave function of the surface Majorana fermions. Our formulated theory demonstrates the depth independent mobility by considering intermediate states in the scattering process. Therefore, we conclude that the experiment has succeeded in observing Majorana fermions in the surface bound state.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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