Reconstruction of nuclear quadrupole interaction in (In,Ga)As/GaAs quantum dots observed by transmission electron microscopy

Abstract

A microscopic study of the individual annealed (In,Ga)As/GaAs quantum dots is done by means of high-resolution transmission electron microscopy. The Cauchy-Green strain-tensor component distribution and the chemical composition of the (In,Ga)As alloy are extracted from the microscopy images. The image processing allows for the reconstruction of the strain-induced electric-field gradients at the individual atomic columns extracting thereby the magnitude and asymmetry parameter of the nuclear quadrupole interaction. Nuclear magnetic resonance absorption spectra are analyzed for parallel and transverse mutual orientations of the electric-field gradient and a static magnetic field.

8 pages, 6 figures

References in corpus (10)

• Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics
• Bistability of the Nuclear Polarisation created through optical pumping in InGaAs Quantum Dots
• Nonlinear dynamics of quantum dot nuclear spins
• Demagnetization of Quantum Dot Nuclear Spins: Breakdown of the Nuclear Spin Temperature Approach
• Stabilizing effect of nuclear quadrupole interaction on the polarization of electron-nuclear spin system in a quantum dot
• Quantum Description of Nuclear Spin Cooling in a Quantum Dot
• Interplay of Electron and Nuclear Spin Noise in GaAs
• Influcence of the nuclear electric quadrupolar interaction on the coherence time of hole- and electron-spins confined in semiconductor quantum dots
• Nuclear magnetic resonance inverse spectra of InGaAs quantum dots: Atomistic level structural information
• Nuclear magnetic resonances in (In,Ga)As/GaAs quantum dots studied by resonant optical pumping

Cited by in corpus (8)

• Quantum model for mode locking in pulsed semiconductor quantum dots
• Cross-calibration of GaAs deformation potentials and gradient-elastic tensors using photoluminescence and nuclear magnetic resonance spectroscopy in GaAs/AlGaAs quantum dot structures
• Dephasing of InAs quantum dot p-shell excitons using two-dimensional coherent spectroscopy
• Unveiling the electron-nuclear spin dynamics in an n-doped InGaAs epilayer by spin noise spectroscopy
• Nuclear magnetic resonance spectroscopy of nonequilibrium steady states in quantum dots
• Spin dynamics of quadrupole nuclei in InGaAs quantum dots
• Electrically tunable dynamic nuclear spin polarization in GaAs quantum dots at zero magnetic field
• Quantitative strain analysis of InAs/GaAs quantum dot materials