ν=1 bilayer quantum Hall state at arbitrary electron distribution in a double quantum well

1998 ◽  
Vol 42 (7-8) ◽  
pp. 1183-1185
Author(s):  
Y Ohno ◽  
A Sawada ◽  
Z.F Ezawa ◽  
H Ohno ◽  
Y Horikoshi ◽  
...  
Keyword(s):  
Quantum Well ◽  
Electron Distribution ◽  
Quantum Hall ◽  
Double Quantum ◽  
Double Quantum Well ◽  
Bilayer Quantum Hall ◽  
Quantum Hall State

MULTI-VALENCE-SUBBAND MAGNETOTRANSPORT IN A MODULATION-DOPED p-TYPE Ge1-xSix/Ge/Ge1-xSix QUANTUM WELL

2004 ◽  
Vol 18 (27n29) ◽  
pp. 3641-3644
Author(s):  
M. V. YAKUNIN ◽  
G. A. ALSHANSKII ◽  
V. N. NEVEROV ◽  
YU. G. ARAPOV ◽  
G. I. HARUS ◽  
...  
Keyword(s):  
Quantum Well ◽  
Heavy Hole ◽  
Quantum Hall ◽  
Double Quantum ◽  
Double Quantum Well ◽  
Self Consistent ◽  
Order Of Magnitude ◽  
P Type ◽  
Quantum Hall State ◽  
Layer Deformation

We show, from self-consistent calculations, that the effective mass for motion of holes along a two-dimensional (111) Ge layer is almost an order of magnitude smaller than the bulk heavy hole mass, which determines the intersubband distances. This creates a unique situation of multiple populated electric subbands at moderate hole densities ps and layer widths. Depopulation of two or more upper subbands in a 38 nm wide p- Ge layer with ps=5×1015 m -2 has been revealed from the magnetoresistance in high parallel magnetic fields, while a collapse of the quantum Hall state for filling factor ν=1 indicates that two ground subbands merge in a self-formed double-quantum-well potential profile. The latter effect in the valence band is shown to be sensitive to the layer deformation.

Magnetic-field-driven destruction of quantum Hall states in a double quantum well

1990 ◽  
Vol 64 (15) ◽  
pp. 1793-1796 ◽  
Author(s):  
G. S. Boebinger ◽  
H. W. Jiang ◽  
L. N. Pfeiffer ◽  
K. W. West
Keyword(s):  
Magnetic Field ◽  
Quantum Well ◽  
Quantum Hall ◽  
Double Quantum ◽  
Quantum Hall States ◽  
Double Quantum Well ◽  
Hall States
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