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arXiv 0803.0854cond-mat.mes-hallcond-mat.supr-con
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超导体/铁磁体量子点接触的有限频率噪声

Finite frequency noise of a superconductor/ferromagnet quantum point contact

Audrey Cottet, Benoit Doucot, Wolfgang Belzig

摘要:

计算了超导体-铁磁量子点接触(SF QPC)的有限频率电流噪声。这个信号是定性的影响,由自旋依赖性的界面相移(SDIPS)获得的电子反射后的QPC。对于弱透明QPC,噪声阶跃出现在由SDIPS直接确定的频率或电压处。这些步骤可以在实验可达到的温度和频率下发生。因此,有限频率噪声是一个很有前途的工具来表征SF QPC的散射特性。

英文摘要:

We have calculated the finite-frequency current noise of a superconductor-ferromagnet quantum point contact (SF QPC). This signal is qualitatively affected by the spin-dependence of interfacial phase shifts (SDIPS) acquired by electrons upon reflection on the QPC. For a weakly transparent QPC, noise steps appear at frequencies or voltages determined directly by the SDIPS. These steps can occur at experimentally accessible temperatures and frequencies. Finite frequency noise is thus a promising tool to characterize the scattering properties of a SF QPC.

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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