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- W2059966689 abstract "We report a high-pressure study of metal-organic-vapor-phase-epitaxially-grown bulk GaSb and ${mathrm{Ga}}_{1mathrm{ensuremath{-}}mathit{x}}$${mathrm{In}}_{mathit{x}}$Sb/GaSb quantum wells. For photoluminescence experiments we have used a diamond-anvil cell with pressures up to 75 kbar, using the photoluminescence from bulk InP as a pressure gauge. For bulk GaSb we have measured the ensuremath{Gamma}-gap pressure coefficient as 1.64ifmmodepmelsetextpmfi{}0.03 times larger than that of InP. No bulk GaSb luminescence could be observed above the ${mathit{L}}_{mathit{c}}$-${mathrm{ensuremath{Gamma}}}_{mathit{c}}$ crossover. The ensuremath{Gamma} gap of the quantum well is found to have the same pressure coefficient as the bulk GaSb to within our ensuremath{sim}3% experimental error. This is understood essentially as a consequence of the material and electronic similarity of GaSb and ${mathrm{Ga}}_{1mathrm{ensuremath{-}}mathit{x}}$${mathrm{In}}_{mathit{x}}$Sb (xensuremath{sim}15%). At higher pressure both the quantum well ${mathit{L}}_{mathit{c}}$ and ${mathit{X}}_{mathit{c}}$ conduction-band states are unambiguously observed. There is an ${mathit{L}}_{mathit{c}}$-${mathrm{ensuremath{Gamma}}}_{mathit{c}}$ crossover at 16 kbar, and then an ${mathit{X}}_{mathit{c}}$-${mathit{L}}_{mathit{c}}$ crossover at 43 kbar. These effects are discussed in relation to the hydrostatic- and shear-strain perturbations to the band structure. The quantum-well luminescence quenched at about ensuremath{sim}70 kbar, and this is interpreted as a phase change of the GaSb." @default.
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- W2059966689 date "1991-02-15" @default.
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- W2059966689 title "High-pressure investigation of GaSb and<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Ga</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi mathvariant=normal>−</mml:mi><mml:mi mathvariant=italic>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>In</mml:mi></mml:mrow…" @default.
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- W2059966689 doi "https://doi.org/10.1103/physrevb.43.4994" @default.
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