title: Vibrational, electronic and structural properties of wurtzite GaAs nanowires under hydrostatic pressure.
abstract: The structural, vibrational, and electronic properties of GaAs nanowires have been studied in the metastable wurtzite phase via Resonant Raman spectroscopy and synchrotron X-ray diffraction measurements in diamond anvil cells under hydrostatic conditions between 0 and 23 GPa. The direct band gap E0 and the crystal field split-off gap E0 + Δ of wurtzite GaAs increase with pressure and their values become close to those of zinc-blende GaAs at 5 GPa, while being reported slightly larger at lower pressures. Above 21 GPa, a complete structural transition from the wurtzite to an orthorhombic phase is observed in both Raman and X-ray diffraction experiments.
authors.affiliation: Key Laboratory of Materials Physics and Center for Energy Matter in Extreme Environments, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhou
authors.affiliation: 1] Key Laboratory of Materials Physics and Center for Energy Matter in Extreme Environments, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China [2] Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China.
authors.forename: Xiao-Jia
authors.initials: XJ
authors.lastname: Chen
authors.affiliation: Department of Physics, South China University of Technology, Guangzhou 510640, China.
authors.forename: Jian-Bo
authors.initials: JB
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Materials Physics and Center for Energy Matter in Extreme Environments, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.
authors.forename: Xin-Hua
authors.initials: XH
authors.lastname: Li
authors.affiliation: Key Laboratory of Materials Physics and Center for Energy Matter in Extreme Environments, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.
authors.forename: Yu-Qi
authors.initials: YQ
authors.lastname: Wang
authors.affiliation: 1] Key Laboratory of Materials Physics and Center for Energy Matter in Extreme Environments, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China [2] Geophysical Laboratory, Carnegie Institution of Washington, Washington D.C. 20015, U.S.A.
authors.forename: Alexander F
authors.initials: AF
authors.lastname: Goncharov