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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Trion formation in a two-dimensional hole-doped electron gas
AU - Spink, G. G.
AU - Rios, P. Lopez
AU - Drummond, N. D.
AU - Needs, R. J.
PY - 2016/7/22
Y1 - 2016/7/22
N2 - The interaction between a single hole and a two-dimensional, paramagnetic, homogeneous electron gas is studied using diffusion quantum Monte Carlo simulations. Electron-hole relaxation energies, pair-correlation functions, and electron-hole center-of-mass momentum densities are reported for a range of electron-hole mass ratios and electron densities. We find numerical evidence of a crossover from a collective excitonic state to a trion-dominated state in a density range in agreement with that found in recent experiments on quantum-well heterostructures.
AB - The interaction between a single hole and a two-dimensional, paramagnetic, homogeneous electron gas is studied using diffusion quantum Monte Carlo simulations. Electron-hole relaxation energies, pair-correlation functions, and electron-hole center-of-mass momentum densities are reported for a range of electron-hole mass ratios and electron densities. We find numerical evidence of a crossover from a collective excitonic state to a trion-dominated state in a density range in agreement with that found in recent experiments on quantum-well heterostructures.
KW - SEMICONDUCTOR QUANTUM-WELLS
KW - MONTE-CARLO
KW - POSITRON-ANNIHILATION
KW - OPTICAL-ABSORPTION
KW - EXCITONS
KW - COMPLEXES
KW - SPECTRA
KW - DENSITY
KW - SYSTEMS
KW - SOLIDS
U2 - 10.1103/PhysRevB.94.041410
DO - 10.1103/PhysRevB.94.041410
M3 - Journal article
VL - 94
JO - Physical review B
JF - Physical review B
SN - 2469-9950
IS - 4
M1 - 041410
ER -