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Effects of Temperature on the Scattering Phases and Density of States in Quantum Wires

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Low Dimensional Semiconductor Structures

Part of the book series: NanoScience and Technology ((NANO))

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Abstract

We investigate the effects of temperature on the scattering phases in a quantum wire with an attractive scatterer. We consider two bound states, belonging to different subbands, which couple to a scattering channel and give rise to two Fano resonances. In this context, we first demonstrate the deviation of the transmission phase from the Friedel phase at the zeros of the transmission. It is then shown that temperature effects tend to smear sharp features of the transmission phase; namely, the phase drops become less than π and acquire finite widths, which increase linearly in the low-temperature regime. The influence of temperature on the Friedel phase and density of states is also examined.

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Authors and Affiliations

  1. Department of Physics, Aristotle University, Thessaloniki, Greece

    Vassilios Vargiamidis

  2. Department of Physics, Fordham University, Bronx, NY, USA

    Vassilios Fessatidis

  3. Department of Physics and Engineering Physics, Stevens Institute of Technology, Hoboken, NJ, 07030, USA

    Norman J. Morgenstern Horing

Authors
  1. Vassilios Vargiamidis
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  2. Vassilios Fessatidis
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  3. Norman J. Morgenstern Horing
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Corresponding author

Correspondence to Norman J. Morgenstern Horing .

Editor information

Editors and Affiliations

  1. , Dept. of Physics Engineering, Istanbul Technical University, Maslak, Istanbul, 34469, Turkey

    Hilmi Ünlü

  2. , Department of Physics and, Stevens Institute of Technology, Hoboken, 07030, USA

    Norman J. M. Horing

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Vargiamidis, V., Fessatidis, V., Horing, N.J.M. (2012). Effects of Temperature on the Scattering Phases and Density of States in Quantum Wires. In: Ünlü, H., Horing, N. (eds) Low Dimensional Semiconductor Structures. NanoScience and Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-28424-3_8

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  • DOI: https://doi.org/10.1007/978-3-642-28424-3_8

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-28423-6

  • Online ISBN: 978-3-642-28424-3

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