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Composition Dependence of the Hydrostatic Pressure Coefficients of the Bandgap of ZnSe(1-x)Te(x) AlloysOptical absorption experiments have been performed using diamond anvil cells to measure the hydrostatic pressure dependence of the fundamental bandgap of ZnSe(sub 1-xTe(sub x) alloys over the entire composition range. The first and second-order pressure coefficients are obtained as a function of composition. Starting from the ZnSe side, the magnitude of both coefficients increases slowly until x approx. 0.7, where the ambient-pressure bandgap reaches a minimum. For larger values of x the coefficients rapidly approach the values of ZnTe. The large deviations of the pressure coefficients from the linear interpolation between ZnSe and ZnTe are explained in terms of the band anticrossing model.
Document ID
20030062124
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Wu, J.
(California Univ., Lawrence Berkeley National Lab. Berkeley, CA, United States)
Yu, K. M.
(California Univ., Lawrence Berkeley National Lab. Berkeley, CA, United States)
Walukiewicz, W.
(California Univ., Lawrence Berkeley National Lab. Berkeley, CA, United States)
Shan, W.
(California Univ., Lawrence Berkeley National Lab. Berkeley, CA, United States)
Ager, J. W., III
(California Univ., Lawrence Berkeley National Lab. Berkeley, CA, United States)
Haller, E. E.
(California Univ., Lawrence Berkeley National Lab. Berkeley, CA, United States)
Miotkowski, I.
(Purdue Univ. West Lafayette, IN, United States)
Ramdas, A. K.
(Purdue Univ. West Lafayette, IN, United States)
Su, Ching-Hua
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Subject Category
Metals And Metallic Materials
Distribution Limits
Public
Copyright
Other

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