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Cylindrical semiconductor nanowires with constrictions
Author(s) -
Racec Paul N.
Publication year - 2014
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201349248
Subject(s) - nanowire , quantum tunnelling , semiconductor , conductance , quantum wire , condensed matter physics , physics , formalism (music) , electron , quantum , bound state , atomic physics , quantum mechanics , art , musical , visual arts
Abstract The energy dependence of the tunneling coefficient for a cylindrical semiconductor nanowire, i.e., a one‐dimensional electron gas, with two constrictions is studied. Using the R‐matrix formalism the localization probabilities at the resonant energies can be computed. They give decisive information about the physical meaning of the resonant peaks and dips that appear. The nanowire with two constrictions yields a well‐defined system for the experimental evidence of the quasi‐bound states of the evanescent channels. Clearly marked dips due to them should appear in the linear conductance at low temperatures. Tunneling coefficient T ( m )for a cylindrical nanowire with one or two constrictions, for a specific magnetic quantum number m . The influences of the geometrical parameters on the resonant energies are also shown.