Optical properties of cubic and rhombohedral GeTe

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.

References in corpus (6)

• Giant Anharmonic Phonon Scattering in PbTe
• Coexistence of tetrahedral and octahedral-like sites in amorphous phase change materials
• Electronic Structure Calculations with the Tran-Blaha Modified Becke-Johnson Density Functional
• Structure and optical properties of high light output halide scintillators
• Ab Initio Phonon Dispersions for PbTe
• Atomistic origins of the phase transition mechanism in Ge2Sb2Te5

Cited by in corpus (7)

• Surface versus bulk contributions to the giant Rashba splitting in the ferroelectric α-GeTe(111) semiconductor
• Competing covalent and ionic bonding in Ge-Sb-Te phase change materials
• Unusual thermoelectric transport anisotropy in quasi-2D, rhombohedral GeTe
• $GW$ study of pressure-induced topological insulator transition in group IV-tellurides
• Flux periodic oscillations and phase-coherent transport in GeTe nanowire-based devices
• Tunning Spin Hall conductivities in GeTe by Ferroelectric Polarization
• Electronic properties of GeTe and Ag- or Sb-substituted GeTe studied by low temperature 125Te NMR