TY - JOUR
T1 - Parallel magnetic-field-induced conductance fluctuations in one- and two-subband ballistic quantum dots
AU - Gustin, C.
AU - Faniel, S.
AU - Hackens, B.
AU - Melinte, S.
AU - Shayegan, M.
AU - Bayot, V.
PY - 2003/12/18
Y1 - 2003/12/18
N2 - We report on conductance fluctuations of ballistic quantum dots in a strictly parallel magnetic field B. The quantum dots are patterned in two-dimensional electron gases (2DEG’s), confined to 15- and 45-nm-thick GaAs quantum wells (QW) with one and two occupied subbands at B = 0, respectively. For both dots we observe universal conductance fluctuations (UCF’s) and, in the case of the wide QW dot, a reduction in their amplitude at large B. Our data suggest that the finite thickness of the 2DEG and the orbital effect are responsible for the parallel B-induced UCF’s.
AB - We report on conductance fluctuations of ballistic quantum dots in a strictly parallel magnetic field B. The quantum dots are patterned in two-dimensional electron gases (2DEG’s), confined to 15- and 45-nm-thick GaAs quantum wells (QW) with one and two occupied subbands at B = 0, respectively. For both dots we observe universal conductance fluctuations (UCF’s) and, in the case of the wide QW dot, a reduction in their amplitude at large B. Our data suggest that the finite thickness of the 2DEG and the orbital effect are responsible for the parallel B-induced UCF’s.
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U2 - 10.1103/PhysRevB.68.241305
DO - 10.1103/PhysRevB.68.241305
M3 - Article
AN - SCOPUS:1042299900
SN - 1098-0121
VL - 68
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 24
ER -