Search Results - "Ramdas, A.K."

Electronic transitions of holes bound to boron acceptors in isotopically controlled diamonds by Kim, Hyunjung, Ramdas, A.K., Rodriguez, S., Anthony, T.R.

“…The excitation spectrum of holes bound to substitutional boron acceptors introduced into a 13C diamond is compared with that of boron acceptors in natural Type…”
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Chemical vapor transport of chalcopyrite semiconductors: CuGaS2 and AgGaS2 by Lauck, R., Cardona, M., Kremer, R.K., Siegle, G., Bhosale, J.S., Ramdas, A.K., Alawadhi, H., Miotkowski, I., Romero, A.H., Muñoz, A., Burger, A.

“…Crystals of CuGaS2 and AgGaS2 with different isotopic compositions have been grown by chemical vapor transport (CVT) using iodine as the transport agent…”
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Interaction of localized electronic states with the conduction band: band anticrossing in II-VI semiconductor ternaries by Walukiewicz, W, Shan, W, Yu, KM, Ager, 3rd, JW, Haller, EE, Miotkowski, I, I, Seong, MJ, Alawadhi, H, Ramdas, AK

“…We report a strongly nonlinear pressure dependence of the band gaps and large downward shifts of the conduction band edges as functions of composition in ZnS…”
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Gettered GaP Substrates for Improved Multijunction Solar Cell Devices by Montgomery, K. H., Allen, C. R., Wildeson, I. H., Jeon, J.-H., Ramdas, A. K., Woodall, J. M.

“…We report on the characterization of gettered p -type GaP substrates for application in high-efficiency multijunction solar cells. A commercial zinc-doped GaP…”
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Electronic band gaps of semiconductors as influenced by their isotopic composition by Ramdas, A.K., Rodriguez, S., Tsoi, S., Haller, E.E.

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Electronic band gaps of semiconductors as influenced by their isotopic composition by Ramdas, A.K., Rodriguez, S., Tsoi, S., Haller, E.E.

“…The present paper focuses on the renormalization effects of the band gaps in the electronic band structure of the elemental semiconductors traced to zero-point…”
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Brillouin and Raman scattering in natural and isotopically controlled diamond by Vogelgesang, R, Ramdas, AK, Rodriguez, S, Grimsditch, M, Anthony, TR

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Isotopic effects in semiconductors by Ramdas, A.K., Haller, E.E.

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Preface by Haller, E.E, Ramdas, A.K

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Level mixing and anisotropy effect in resonant Raman electron paramagnetic transitions in ruby for B perpendicular to c by Lu, X., Venugopalan, S., Kim, Hyunjung, Grimsditch, M., Rodriguez, S., Ramdas, A.K.

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Band anticrossing in Group II-Ox-VI1-x highly mismatched alloys: Cd1-yMnyOxTe1-x quaternaries synthesized by O ion implantation by Yu, K.M., Walukiewicz, W., Wu, J., Beeman, J.W., Ager III, J.W., Haller, E.E., Miotkowski, I., Ramdas, A.K., Becla, P.

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Band anticrossing effects in Mg{sub y}Zn{sub 1-y}Te{sub 1-x}Se{sub x} alloys by Wu, J., Walukiewicz, W., Yu, K.M., Ager III, J.W., Shan, W., Haller, E.E., Miotkowski, I., Ramdas, A.K., Miotkowska, S.

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Spin–orbit coupling, mass anisotropy, time-reversal symmetry, and spontaneous symmetry breaking in the spectroscopy of shallow centers in elemental semiconductors by Ramdas, A.K., Rodriguez, S.

“…The electronic states of shallow donors and acceptors, explored under high resolution with Fourier Transform infrared and Raman spectroscopy, underscore the…”
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Lattice Vibrations and Electronic Excitations in Isotopically Controlled Diamonds by Ramdas, A. K., Rodriguez, S.

“…The success in the growth of man‐made, isotopically controlled single crystals of 12C1—x13Cx diamonds (0 ≤ x ≤ 1) has created splendid spectroscopic…”
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The anomalous variation of band gap with alloy composition: cation vs anion substitution in ZnTe by Seong, M.J., Alawadhi, H., Miotkowski, I., Ramdas, A.K., Miotkowska, S.

“…The energy of the excitonic signature, E g( x), in the wavelength modulated reflectivity spectrum of Zn 1− x Mg x Te shows a monotonic increase with x in…”
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Electronic Raman and Infrared Spectra of Isotopically Controlled “Blue” Diamonds by Kim, Hyunjung, Vogelgesang, R., Ramdas, A. K., Rodriguez, S., Grimsditch, M., Anthony, T. R.

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Lattice parameters and optical characterization of Cd 1− xMg xSe alloys grown by vertical gradient freezing technique by Miotkowski, I, Vogelgesang, R, Alawadhi, H, Seong, M.J, Ramdas, A.K, Miotkowska, S, Paszkowicz, W

“…Single crystals of Cd 1− x Mg x Se ternaries grown by the vertical gradient freezing technique are characterized by X-ray diffraction and electron probe…”
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Magnetospectroscopy of Acceptors in “Blue” Diamonds by Kim, Hyunjung, Ramdas, A. K., Rodriguez, S., Grimsditch, M., Anthony, T. R.

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Isotopic constitution of semiconductors: Manifestations in their electronic and vibrational spectra by Ramdas, A.K.

“…Semiconductors are prime examples of crystals which can be grown with unprecedented purity, imperfections being introduced deliberately in a controlled manner…”
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Lattice parameters and optical characterization of Cd1-xMgxSe alloys grown by vertical gradient freezing technique by MIOTKOWSKI, I, VOGELGESANG, R, ALAWADHI, H, SEONG, M. J, RAMDAS, A. K, MIOTKOWSKA, S, PASZKOWICZ, W

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