Photoluminescence studies of a GaAs-Ga1-xAlxAs superlattice at 8-300 K under hydrostatic pressure (0-70 kbar)

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Photoluminescence studies of a GaAs-Ga1-xAlxAs superlattice at 8-300 K under hydrostatic pressure (0-70 kbar)

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/8184

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dc.contributor.author Venkateswaran, Uma Devi
dc.contributor.author Chandrasekhar, Meera
dc.contributor.author Chandrasekhar, Holalkere R.
dc.contributor.author Wolfram, T.
dc.contributor.author Fischer, R.
dc.contributor.author Masselink, W. T.
dc.contributor.author Morkoç, H.
dc.date.accessioned 2010-08-05T20:55:27Z
dc.date.available 2010-08-05T20:55:27Z
dc.date.issued 1985-03-15
dc.identifier.citation Phys. Rev. B 31, 4106-4109 (1985) en
dc.identifier.issn 1098-0121
dc.identifier.uri http://hdl.handle.net/10355/8184
dc.description URL:http://link.aps.org/doi/10.1103/PhysRevB.31.4106 DOI:10.1103/PhysRevB.31.4106 en
dc.description.abstract The pressure dependence (0-70 kbar) of the photoluminescence spectra from a GaAs-Ga1-xAlxAs multiple-quantum-well (MQW) structure is reported at 8-300 K. The pressure coefficients of the EnhΓ and EnlΓ (n=1, 2) transitions between the Γ conduction subbands and the heavy- (h) and light- (l) hole bands are determined. The energy of E1hΓ has a sublinear pressure dependence for the MQW at 80 K but not at 300 K. The reverse is true for the band gap of bulk GaAs. In the MQW the Γ and X bands cross around 35 kbar and a new transition E1hX, observed for the first time, has a pressure coefficient of -1.3±0.1 meV/kbar at 80 K. The X-Γ band separation at atmospheric pressure in the bulk is deduced to be 45-50 meV lower than the previously accepted value of 0.464 eV. The carrier lifetimes in the Γ and X bands and the Γ-to-X scattering times are deduced. en
dc.description.sponsorship The work at the University of Missouri was supported by the Standar Oil Company (Indiana). M.C. also thanks the Research Council of the University of Missouri. The work at the University of Illinois was funded by the Air Force Office of Scientific Research. en
dc.language.iso en_US en
dc.publisher American Physical Society en
dc.relation.ispartof Physics and Astronomy publications en
dc.subject photoacoustic effects en
dc.subject piezo-, elasto-, and acoustooptical effects en
dc.subject.lcsh Optoacoustic spectroscopy en
dc.title Photoluminescence studies of a GaAs-Ga1-xAlxAs superlattice at 8-300 K under hydrostatic pressure (0-70 kbar) en
dc.type Article en
dc.source.harvested American Physical Society en
dc.relation.ispartofcommunity University of Missouri-Columbia. College of Arts and Sciences. Department of Physics and Astronomy


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