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Pumped Spin-Current in Single Quantum Dot with Spin-Dependent Electron Temperature

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Abstract

Spin-dependent electron temperature effect on the spin pump in a single quantum dot connected to Normal and/or Ferromagnetic leads are investigated with the help of master equation method. Results show that spin heat accumulation breaks the tunneling rates balance at the thermal equilibrium state thus the charge current and the spin current are affected to some extent. Pure spin current can be obtained by adjusting pumping intensity or chemical potential of the lead. Spin heat accumulation of certain material can be detected by measuring the charge current strength in symmetric leads architectures. In practical devices, spin-dependent electron temperature effect is quite significant and our results should be useful in quantum information processing and spin Caloritronics.

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Acknowledgments

This work is supported by the National Natural Science Foundation of China Project (Grant No.11564029, 11147010), the Natural Science Foundation of Inner Mongolia (Grant No.2012MS0113), and the Research Program of science and technology at Universities of Inner Mongolia Autonomous Region (Grant No.NJZY12111).

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Authors and Affiliations

  1. School of Science, Inner Mongolia University of Science and Technology, Baotou, 014010, China

    Jia Liu, Song Wang & Xiaohong Du

  2. Key laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources IMUST, Baotou, 014010, China

    Jia Liu

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  1. Jia Liu
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  2. Song Wang
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  3. Xiaohong Du
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Correspondence to Xiaohong Du.

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Liu, J., Wang, S. & Du, X. Pumped Spin-Current in Single Quantum Dot with Spin-Dependent Electron Temperature. Int J Theor Phys 55, 4036–4043 (2016). https://doi.org/10.1007/s10773-016-3032-9

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  • DOI: https://doi.org/10.1007/s10773-016-3032-9

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