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On the single-particle-reduced entropy of a gated nanowire system in the Coulomb blockade regime

Authors

  • José María Castelo,

    1. RheinMain University of Applied Sciences, FB ING/Institute of Microtechnologies, Am Brückweg 26, 65428 Rüsselsheim, Germany
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  • Klaus Michael Indlekofer,

    Corresponding author
    1. RheinMain University of Applied Sciences, FB ING/Institute of Microtechnologies, Am Brückweg 26, 65428 Rüsselsheim, Germany
    • RheinMain University of Applied Sciences, FB ING/Institute of Microtechnologies, Am Brückweg 26, 65428 Rüsselsheim, Germany

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  • Joerg Malindretos

    1. Georg-August-Universität Göttingen, IV. Physikalisches Institut, 37077 Göttingen, Germany
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Abstract

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In this Letter, the single-particle-reduced entropy of a nanowire field-effect transistor (NWFET) in the Coulomb blockade regime is studied by means of a multi-configura-tional self-consistent Green's function approach. Assuming that the many-body statistical preparation of the system is described by a mixture of Slater determinants of relevant natural orbitals, the single-particle-reduced entropy can be interpreted as a measure of the degree of mixture of the system's preparation. Considering the realistic case of an InP based NWFET, we present current–voltage characteristics and entropy diagrams for a range of equilibrium and non-equilibrium states. Signatures of few-electron Coulomb charging effects can be identified, as known from experimental situations. Furthermore, we illustrate the significance of the single-particle-reduced entropy by analyzing the corresponding electronic configurations. (© 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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