Hole-nuclear spin interaction in quantum dots.
We have measured the carrier spin dynamics in p-doped InAs/GaAs quantum dots by pump-probe and time-resolved photoluminescence experiments. We obtained experimental evidence of the hyperfine interaction between hole and nuclear spins. In the absence of an external magnetic field, our calculations based on dipole-dipole coupling between the hole and the quantum dot nuclei lead to a hole-spin dephasing time for an ensemble of dots of 14 ns, in close agreement with experiments.
Eble
B
B
Université Pierre et Marie Curie-Paris6, UMR 7588, INSP, Paris, F-75015 France.
Testelin
C
C
Desfonds
P
P
Bernardot
F
F
Balocchi
A
A
Amand
T
T
Miard
A
A
Lemaître
A
A
Marie
X
X
Chamarro
M
M