Premium
Mesoscopic Conductance Oscillations Associated with Dislocations in Semiconductors
Author(s) -
Figielski T.,
Wosiński T.,
Mąkosa A.
Publication year - 2000
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 - 10.1002/1521-3951(200011)222:1<151::aid-pssb151>3.0.co;2-d
Subject(s) - mesoscopic physics , condensed matter physics , semiconductor , heterojunction , magnetic field , dislocation , conductance , magnetoresistance , physics , lattice (music) , materials science , quantum mechanics , acoustics
In this paper, we demonstrate that dislocations in a macroscopic semiconductor specimen can give rise to specific mesoscopic effects. In the first place, we compare with each other two kinds of closed electron orbits that can appear in small specimens of metals and semiconductors in a magnetic field: the cyclotron orbits and the Aharonov‐Bohm orbits. Next, we consider possible Aharonov‐Bohm orbits encircling a dislocation in a semiconductor under a strong magnetic field whose direction is aligned with the dislocation axis. Finally, we demonstrate experiments confirming the formation of such orbits around misfit dislocations in semiconductor heterostructures with a small lattice mismatch. They manifest themselves at low temperatures as regular fluctuations of conductance through a heterostructure, appearing as a function of applied voltage and magnetic field.