In:
Journal of Applied Physics, AIP Publishing, Vol. 75, No. 5 ( 1994-03-01), p. 2466-2472
Abstract:
The characteristics of the magnetoconductance of a nonuniform electron waveguide containing various shaped obstacles are investigated by using a model of two-coupled tight-binding chains and the transfer-matrix approach. The variation of the magnetoconductance as a function of total magnetic flux Φ threading the obstacle region is presented. The effect of the interchain tunneling modulation on the magnetoconductance for double-mode and single-mode transport processes is different. When the energy of the incident electrons is just above the threshold energy for the opening of the second propagating mode at zero magnetic field, at some magnetic flux, the conductance abruptly decreases owing to the presence of mode quenching. The magnetoconductance for various multiply connected structures and one-dimensional superlattice (1DSL) type tunneling modulation structures is also evaluated. Owing to the presence of the miniband gaps to be formed by 1DSL structures, different patterns in the magnetoconductance are found.
Type of Medium:
Online Resource
ISSN:
0021-8979
,
1089-7550
Language:
English
Publisher:
AIP Publishing
Publication Date:
1994
detail.hit.zdb_id:
220641-9
detail.hit.zdb_id:
3112-4
detail.hit.zdb_id:
1476463-5
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