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Author |
Shah, Jagdeep; Pinczuk, A.; Gossard, A. C.; Wiegmann, W. |
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Title |
Energy-loss rates for hot electrons and holes in GaAs quantum wells |
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1985 |
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Phys. Rev. Lett. |
Abbreviated Journal |
Phys. Rev. Lett. |
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54 |
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2045-2048 |
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Keywords |
2DEG, GaAs/AlGaAs, heat flow, electron-phonon, hole-phonon, carrier-phonon, interactions |
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Abstract |
We report the first direct determination of carrier-energy-loss rates in a semiconductor. These measurements provide fundamental insight into carrier-phonon interactions in semiconductors. Unexpectedly large differences are found in the energy-loss rates for electrons and holes in GaAs/AlGaAs quantum wells. This large difference results from an anomalously low electron-energy-loss rate, which we attribute to the presence of nonequilibrium optical phonons rather than the effects of reduced dimensionality or dynamic screening. |
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633 |
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Author |
Shaha, Jagdeep; Pinczukb, A.; Gossardb, A. C.; Wiegmannb, W. |
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Title |
Hot carrier energy loss rates in GaAs quantum wells: large differences between electrons and holes |
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Journal Article |
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Year |
1985 |
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Phys. B+C |
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134 |
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1-3 |
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174-178 |
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Keywords |
2DEG, GaAs/AlGaAs, heat flow, electron-phonon, hole-phonon, carrier-phonon, interactions |
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The first direct and separate determination of the hot electron and hot hole energy loss rates to the lattice shows unexpectedly large differences between electrons and holes in GaAs quantum wells. This large difference results from an anomalously low electron energy loss rate, which we attribute to the presence of non-equilibrium optical phonon rather than the effects of reduced dimensionality or dynamic screening. A model calculation of hot phonon effects is presented. |
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634 |
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Гершензон, Е. М.; Семенов, И. Т.; Фогельсон, М. С. |
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Title |
Спин-решеточная релаксация доноров фосфора в кремнии при одноосной деформации образца |
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1985 |
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Физика и техника полупроводников |
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Физика и техника полупроводников |
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19 |
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9 |
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1696-1698 |
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uniaxial pressure, Ge, phosphorus donors, spin-lattice relaxation |
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1760 |
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Goltsman, G. N.; Maliavkin, A. V.; Ptitsina, N. G.; Selevko, A. G. |
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Title |
Magnetic exciton spectroscopy in uniaxially compressed Ge at submillimeter waves |
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1986 |
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Izv. Akad. Nauk SSSR, Seriya Fizicheskaya |
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Izv. Akad. Nauk SSSR, Seriya Fizicheskaya |
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50 |
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280-281 |
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Ge, axial compression loads, excitons, germanium, magnetic spectroscopy, submillimeter waves, Zeeman effect |
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Russian |
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0367-6755 |
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3rd Vsesoiuznyi Seminar po Opticheskomu Detektirovaniiu Magnitnykh Rezonansov v Tverdykh Telakh, Kiev, Ukrainian SSR, May 1985 |
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1708 |
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Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsina, N. G.; Riger, E. R. |
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Title |
Effect of electron-electron collisions on the trapping of free carriers by shallow impurity centers in germanium |
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1986 |
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Sov. Phys. JETP |
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Sov. Phys. JETP |
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64 |
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4 |
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889-897 |
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Keywords |
Ge, trapping of free carriers |
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Cascade Auger recombination of free carriers on shallow impurities in Ge is investigated under quasi-equilibrium conditions (T= 2-12 K) and in impurity breakdown. The Auger capture cross sections are found to be a,= 5. 10-l9 T-'n cm2 for donors and uip= 7- T-5p cm2 for acceptors. It is shown that in an isotropic semiconductor (p-Ge) ui is well described by the cascade-capture theory that takes into account only electron-electron collisions. In an anisotropic semiconductor ui is considerably larger (n-Ge, strongly uniaxially compressedp-Ge). Under impurity breakdown conditions the electron-electron collisions determine the lifetimes of the free carriers only in samples with appreciable density of the compensating impurity (Nk loi3 cmP3). |
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1707 |
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