title: The role of Jahn-Teller distortion in insulator to semiconductor phase transition in organic-inorganic hybrid compound (p-chloroanilinium)2CuCl4 at high pressure.
abstract: (p-Chloroanilinium)2CuCl4(C2H14Cl6CuN2) is from an important family of organic-inorganic layered hybrid compounds which can be a possible candidate for multiferroicity. In situ high pressure FTIR, Raman and resistivity measurements on this compound indicate the weakening of Jahn-Teller distortion and the consequent removal of puckering of the CuCl6(4-) octahedra within the layer. These effects trigger insulator to semiconductor phase transition along with a change in the sample colour from yellow to dark red. This article explains the crucial role of the anisotropic volume reduction of the CuCl6(4-) octahedron (caused due to the quenching of Jahn-Teller distortion) in the observed insulator to semiconductor phase transition.
authors.affiliation: School of Science & Engineering, Navrachana University, Vadodara-391 410, Gujarat, India.
authors.forename: Pallavi
authors.initials: P
authors.lastname: Ghalsasi
authors.affiliation: High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai-400 085, India.
authors.forename: Nandini
authors.initials: N
authors.lastname: Garg
authors.affiliation: High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai-400 085, India.
authors.forename: M N
authors.initials: MN
authors.lastname: Deo
authors.affiliation: High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai-400 085, India.
authors.forename: Alka
authors.initials: A
authors.lastname: Garg
authors.affiliation: Faculty of Science, Department of Chemistry, The M.S. University of Baroda, Vadodara-390 001, Gujarat, India. pallavi.teredesai@gmail.com nandini@barc.gov.in.
authors.forename: Hemant
authors.initials: H
authors.lastname: Mande
authors.affiliation: Faculty of Science, Department of Chemistry, The M.S. University of Baroda, Vadodara-390 001, Gujarat, India. pallavi.teredesai@gmail.com nandini@barc.gov.in.
authors.forename: Prasanna
authors.initials: P
authors.lastname: Ghalsasi
authors.affiliation: High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai-400 085, India.
authors.forename: Surinder M
authors.initials: SM
authors.lastname: Sharma