@article{b017da87a67e46c0a6d193ce20446271,
title = "Optical properties of (GeTe, Sb2Te3) pseudobinary thin films studied with spectroscopic ellipsometry",
abstract = "The authors measure the dielectric functions of (GeTe, Sb 2Te3) pseudobinary thin films by using spectroscopic ellipsometry. By using standard critical point model, they obtained the optical transition (critical point) energies of the amorphous (crystalline) thin films. The optical (indirect band) gap energies of the amorphous (crystalline) phase are estimated from the linear extrapolation of the absorption coefficients. The band structure calculations show that GeTe, Ge2 Sb2 Te5, and Ge1 Sb2 Te4 have indirect gap whereas Ge1 Sb4 Te7 and Sb2Te3 have direct gap. The measured indirect band gap energies match well with electronic band structure calculations.",
author = "Park, {Jun Woo} and Baek, {Seoung Ho} and Kang, {Tae Dong} and Hosun Lee and Kang, {Youn Seon} and Lee, {Tae Yon} and Suh, {Dong Seok} and Kim, {Ki Joon} and Kim, {Cheol Kyu} and Khang, {Yoon Ho} and {Da Silva}, {Juarez L.F.} and Wei, {Su Huai}",
note = "Funding Information: The work at KHU was supported by a Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MOST) (R01-2007-000-20142-0). The work at NREL is supported by the U.S. Department of Energy, under Contract No. DE-AC3699GO10337. J.W.P. was supported in part by a 2007 Graduate Student Scholarship from Kyung Hee University.",
year = "2008",
month = jul,
day = "14",
doi = "10.1063/1.2959818",
language = "English",
volume = "93",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics",
number = "2",
}