Deformation Potentials for Excitons in CsI
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1968-09-01
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Physics and Astronomy
Physics and astronomy are basic natural sciences which attempt to describe and provide an understanding of both our world and our universe. Physics serves as the underpinning of many different disciplines including the other natural sciences and technological areas.
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Physics and Astronomy
Abstract
The shifts of the first two exciton peaks with hydrostatic pressure have been measured in CsI films at 78°K and found to be linear. The deformation potentials deduced are -2.10 eV and +2.10 eV, respectively. These results confirm Onodera's assignment of the two peaks to excitons derived from bands of different symmetry. The data indicate that above 7 kbar the conduction bands cross and the Γ12 level lies below the Γ1 (Onodera's assignment).
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This article is from Physical Review Letters 21 (1968): 689, doi:10.1103/PhysRevLett.21.689. Posted with permission.
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Mon Jan 01 00:00:00 UTC 1968