Spin-orbit effects in a GaAs quantum dot in a parallel magnetic field.
We analyze the effects of spin-orbit coupling on fluctuations of the conductance of a quantum dot fabricated in a GaAs heterostructure. Counterintuitively we argue that spin-orbit effects may become important in the presence of a large parallel magnetic field B( parallel), even if they are negligible for B( parallel) = 0. This should be manifest in the level repulsion of a closed dot, and in reduced conductance fluctuations in dots with a small number of open channels in each lead, for large B( parallel). Our picture is consistent with the experimental observations of Folk et al.
Halperin
B I
BI
Lyman Laboratory of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Stern
A
A
Oreg
Y
Y
Cremers
J N
JN
Folk
J A
JA
Marcus
C M
CM