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cond-mat.mtrl-sci2006
Photoluminescence Spectroscopy of Band Gap Shrinkage in GaN
Niladri Sarkar, Subhasis Ghosh
We present an experimental investigation of band-gap shrinkage in n-type GaN using photoluminescence spectroscopy, as a function of electron concentration and temperature. The obse…
cond-mat.mtrl-sci2005
Temperature dependence of the band gap shrinkage due to electron-phonon interaction in undoped n-type GaN
Niladri Sarkar, Subhasis Ghosh
The photoluminescence spectra of band-edge transitions in GaN is studied as a function of temperature. The parameters that describe the temperature dependence red-shift of the band…
cond-mat.mtrl-sci2004
Photoluminescence Spectroscopy of many-body Effects in Heavily Doped AlGaAs
Subhasis Ghosh, Niladri Sarkar
We present an experimental investigation of heavy doping-induced many-body effects such as band gap narrowing(BGN) and Fermi edge singularity(FES) in AlGaAs using photo…