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

Part of the NanoScience and Technology book series (NANO)


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.


Quantum Wires Fano Resonance Friedel Phase Transmission Phase Drop Phase 
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© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Department of PhysicsAristotle UniversityThessalonikiGreece
  2. 2.Department of PhysicsFordham UniversityBronxUSA
  3. 3.Department of Physics and Engineering PhysicsStevens Institute of TechnologyHobokenUSA

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