Observation of the Semiconductor-Semimetal and Semimetal-Semiconductor Transitions in Bi Quantum Wires Induced by Anisotropic Deformation and Magnetic Field

The semimetal-semiconductor transition is observed in glass-coated quantum single-crystal bismuth wires with diameters less than 70 nm due to the quantum size effect. It is found that elastic deformation of Bi nanowires (10 1) oriented along the wire axis with the semiconductor dependence R ( T ) le...

Full description

Saved in:
Bibliographic Details
Published in:Journal of low temperature physics 2010-02, Vol.158 (3-4), p.530-535
Main Authors: Nikolaeva, A., Huber, T., Konopko, L., Tsurkan, A.
Format: Article
Language:English
Subjects:
Bismuth
Characterization and Evaluation of Materials
Condensed Matter Physics
Elastic deformation
Magnetic fields
Magnetic Materials
Magnetism
Magnetoresistivity
Nanowires
Physics
Physics and Astronomy
Semiconductors
Thermoelectricity
Wire
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The semimetal-semiconductor transition is observed in glass-coated quantum single-crystal bismuth wires with diameters less than 70 nm due to the quantum size effect. It is found that elastic deformation of Bi nanowires (10 1) oriented along the wire axis with the semiconductor dependence R ( T ) leads to the approaching of L and T bands and to the semiconductor-semimetal transition; as a result, Shubnikov-de Haas oscillations appear on the magnetoresistance dependences R ( H ). It is shown that strong magnetic field and elastic deformation are the tools to control gap size in quantum bismuth wires, which is principal for their practical use in particular in thermoelectricity.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-009-0027-4