New aspects of the magnetoluminescence of a band to acceptor transition in GaAs

Abstract

The magnetic field dependence of the conduction band to acceptor (e, A") transition involving the acceptor carbon is analyzed in high-purity p-type GaAs a t very low and very high excitation intensities. The change in the density of states of the free electrons with magnetic field determines the lineshape and the non-linear peak shift of these transitions.

Magnetophotoluminescence studies of InxGa1 xAs1 yNy: a measurement of the electron effective mass, exciton size, and degree of carrier localization

“…As an example, the PL spectra of samples with y = 0.043% (dilute limit) and 0.21% (alloy limit) are shown in panels [30]. At zero magnetic field, E d extrapolates to a negative value, of the order of k B T /2, as found in other magneto-PL measurements of the B-induced shift of free-electron to neutral acceptor recombinations [31][32][33]. This behaviour is usually attributed to the change in the density of states of the system from three-to one-dimensional due to the applied magnetic field.…”

Early manifestation of localization effects in diluted Ga(AsN)

“…20 At zero magnetic field, ⌬E d extrapolates to a negative value, of order of k B T/2, as found in other magneto-PL measurements of the B-induced shift of free-electron to neutral-acceptor recombinations. [21][22][23] This behavior is usually attributed to a change in the density of states of the system from three to one dimensional due to a magnetic field being applied. The fitted values of m e are shown versus y in Fig.…”

Two-dimensional electron bound hole photoluminescence in GaAs in perpendicular magnetic fields

“…The 2D electrons predominantly recombine with the neutral carbon recombination centers at z C . In the deeper regions of the GaAs buffer bulklike recombination lines such as donor-acceptor [10] D 0 A 0 and electron-acceptor [11][12][13]] eA 0 single-particle transitions and bound (A 0 X, D 0 X, D + X) and free excitons [14][15][16][17][18][19][20] X are present. Interface and bulk-like transitions are not independent from each other but are linked together.…”