Magnetoanisotropy of electron-correlation-enhanced tunneling through a quantum dot

Asymmetry of charge relaxation times in quantum dots: The influence of degeneracy

“…The other models are incompatible with the data. This finding is in agreement with wave-function mapping experiments [7,16,30]. It should be pointed out that the distribution of quantum-dot energy levels is much broader than the splitting δE p of the p-orbitals.…”

Sensitive detection of photoexcited carriers by resonant tunneling through a single quantum dot

“…In the absence of light, a sharp peak is observed in I(V ) at V ∼ 20 mV. Its form is approximately triangular with a sharp and temperaturedependent onset at low bias, which is consistent with energy-conserving resonant tunneling of electrons from a thermalised degenerate 3D Fermi gas in the GaAs emitter into a 0D QD state in the barrier 14 . Thus, at this low bias, the tunnel current is determined by a single "active" QD.…”

X-ray edge singularity in optical spectra of quantum dots

“…At nonzero temperatures T the singularity gets smeared and I T γ becomes a universal function of eV/k B T , 17 as has been demonstrated in numerous experiments. 17,18 In this work we focus on the realization of the x-ray edge problem in noninteracting quantum dots by means of optics experiments. The possibility of tuning the system parameters in quantum dots enables one to vary the relevant quantity in the x-ray edge problem: the phase shift δ of the conduction-band electrons.…”