Optical properties of cubic and rhombohedral GeTe

2013/05/08 by David J. Singh · 26 citations
Materials Science · Physics and Astronomy · #Band gap #Chemical and Physical Properties of Materials #Distortion (music) #Electronic band structure #Ferroelectricity #Phase (matter) #Phase-change materials and chalcogenides #Solid-state spectroscopy and crystallography #Trigonal crystal system #cond-mat.mtrl-sci

paper · pdf · doi:10.1063/1.4807638

published in Journal of Applied Physics 113(20) (American Institute of Physics)

arxiv created 2013/05/08 · openalex publication_date 2013/05/23 · arxiv updated 2013/05/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Calculations of the optical properties of GeTe in the cubic NaCl and rhombohedral ferroelectric structures are reported. The rhombohedral ferroelectric distortion increases the band gap from 0.11 eV to 0.38 eV. Remarkably, substantial changes in optical properties are found even at high energies up to 5 eV. The results are discussed in relation to the bonding of GeTe and to phase change materials based on it.

Citations

• Phase Transition in SnTe with Low Carrier Concentration
• Electronic structure calculations with the Tran-Blaha modified Becke-Johnson density functional
• Recent progress in relaxor ferroelectrics with perovskite structure
• Atoms, molecules, solids, and surfaces: Applications of the generalized gradient approximation for exchange and correlation

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