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Magnetocaloric effect in Rashba spin-orbit coupling and Zeeman splitting of a narrow nanowire quantum dot

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Abstract

In this work, we investigate the magnetocaloric effect for narrow nanowire quantum dot based on spin-orbit coupling of the Rashba type. We first present an explicit expression for a one-dimension narrow nanowire quantum dot in the context of spin-orbit coupling effects. We determine the magnetocaloric properties of narrow nanowire quantum dot. Our results show that the entropy change of the system depends on the applied external magnetic field, the angle between magnetic field and the x axis, width of quantum well and also depends on temperature, which affects the motion of the electrons. Also, the entropy change decreases with raising the Rashba coupling at a fixed value of temperature. It oscillates with the angle \(\phi \) and presents two maximum values for one-dimensional spin-orbit-coupled nanowire quantum dot. The main result presented in this work is the relation between the total heat related to the magnetocaloric effect and the width of the quantum well, the angle \(\phi \) and the magnetic field. Our results show that the angle between B and the x axis and width of the quantum well are important parameters to consider in order to find out a good refrigerator material.

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Authors and Affiliations

  1. Department of Physics, College of Sciences, Jahrom University, Jahrom, 74135-111, Iran

    H. R. Rastegar-Sedehi

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  1. H. R. Rastegar-Sedehi
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Correspondence to H. R. Rastegar-Sedehi.

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Rastegar-Sedehi, H.R. Magnetocaloric effect in Rashba spin-orbit coupling and Zeeman splitting of a narrow nanowire quantum dot. Eur. Phys. J. Plus 136, 514 (2021). https://doi.org/10.1140/epjp/s13360-021-01532-7

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