2013
DOI: 10.1016/j.spmi.2013.09.036
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Transport properties of a quasi-two-dimensional electron gas in a SiGe/Si/SiGe quantum well including temperature and magnetic field effects

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Cited by 2 publications
(2 citation statements)
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“…Low-density α High-density α Dingle ratios RPA method and includes local-field corrections to the theoretical mobility calculations, exponent values of α ∼ 2.4 25,32,38 agreeing with experimental data are obtained. In the device with the deepest 2DEG, the power-law exponent α ∼ 3 obtained at lower density (gray curve) is significantly larger than what is observed for shallower devices and what is theoretically predicted.…”
Section: Deg Depthsupporting
confidence: 68%
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“…Low-density α High-density α Dingle ratios RPA method and includes local-field corrections to the theoretical mobility calculations, exponent values of α ∼ 2.4 25,32,38 agreeing with experimental data are obtained. In the device with the deepest 2DEG, the power-law exponent α ∼ 3 obtained at lower density (gray curve) is significantly larger than what is observed for shallower devices and what is theoretically predicted.…”
Section: Deg Depthsupporting
confidence: 68%
“…Interface roughness scattering causes the mobility to decrease with increasing density 7,[30][31][32] and is thus extremely unlikely to be the dominant scattering mechanism in our devices, except near the highest achievable densities in the 100 nm deep device (green dotted line). Scattering from charge centers could arise from many sources in our devices: background impurities in the Si quantum well, background impurities in the SiGe barriers, trapped charges at the Si/SiGe (quantum well / spacer) interfaces, trapped charges at the cap/spacer interface, trapped charges at the amorphous SiO 2 /Si interface, charges trapped at the SiO 2 /Al 2 O 3 interface, or charges trapped at the gate/insulator interface.…”
mentioning
confidence: 99%