title: Pressure-induced metallization of molybdenum disulfide.
abstract: X-ray diffraction, Raman spectroscopy, and electrical conductivity measurements of molybdenum disulfide MoS(2) are performed at pressures up to 81 GPa in diamond anvil cells. Above 20 GPa, we find discontinuous changes in Raman spectra and x-ray diffraction patterns which provide evidence for isostructural phase transition from 2H(c) to 2H(a) modification through layer sliding previously predicted theoretically. This first-order transition, which is completed around 40 GPa, is characterized by a collapse in the c-lattice parameter and volume and also by changes in interlayer bonding. After the phase transition completion, MoS(2) becomes metallic. The reversibility of the phase transition is identified from all these techniques.
authors.affiliation: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China.
authors.forename: Zhen-Hua
authors.initials: ZH
authors.lastname: Chi
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, People's Republic of China and Department of Physics, South China University of Technology, Guangzhou 510640, People's Republic of China.
authors.forename: Xiao-Miao
authors.initials: XM
authors.lastname: Zhao
authors.affiliation: Geophysical Laboratory, Carnegie Institution of Washington, Washington, D.C. 20015, USA.
authors.forename: Haidong
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China and Geophysical Laboratory, Carnegie Institution of Washington, Washington, D.C. 20015, USA.
authors.forename: Alexander F
authors.initials: AF
authors.lastname: Goncharov
authors.affiliation: Geophysical Laboratory, Carnegie Institution of Washington, Washington, D.C. 20015, USA and V.S. Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk 630090, Russia.
authors.forename: Sergey S
authors.initials: SS
authors.lastname: Lobanov
authors.affiliation: KYOKUGEN, Center for Quantum Science and Technology under Extreme Conditions, Osaka University, Osaka 560-8531, Japan.
authors.forename: Tomoko
authors.initials: T
authors.lastname: Kagayama
authors.affiliation: KYOKUGEN, Center for Quantum Science and Technology under Extreme Conditions, Osaka University, Osaka 560-8531, Japan.
authors.forename: Masafumi
authors.initials: M
authors.lastname: Sakata
authors.affiliation: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China and Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, People's Republic of China and Geophysical Laboratory, Carnegie Institution of Washington, Washington, D.C. 20015, USA.
authors.forename: Xiao-Jia
authors.initials: XJ
authors.lastname: Chen