High-Pressure Phase Transitions of Zinc Difluoride up to 55 GPa

High pressure structural studies on Nb5Si3 up to 26.2 GPa

Universal transition state for high-pressure zinc blende to rocksalt phase transitions.

First-principles density functional calculations show that the high-pressure transitions of different semiconductors from zinc blende to rocksalt go through a transition state, which is universal in the sense that its position along the path and the corresponding geometry is independent of the chemical components of the semiconductor. This is explained using a Landau-like model expansion of the...

Pressure-induced structural transitions in europium to 92 GPa

W. Bi,1 Y. Meng,2 R. S. Kumar,3 A. L. Cornelius,3 W. W. Tipton,4 R. G. Hennig,4 Y. Zhang,3 C. Chen,3 and J. S. Schilling1 1Department of Physics, Washington University, CB 1105, One Brookings Dr., St. Louis, Missouri 63130, USA 2HPCAT, Carnegie Institution of Washington, 9700 S. Cass Ave., Argonne, Illinois 60439, USA 3Department of Physics and High Pressure Science and Engineering Center, Univ...

Electrical resistivity study of CeZn11: Magnetic field and pressure phase diagram up to 5 GPa

Thorough resistivity measurements on single crystals of CeZn 11 under pressure p and magnetic field H are presented. At ambient pressure, CeZn 11 orders antiferromagnetically at T N = 2 K. The pressure dependence of the resistivity reveals an increase of the Kondo effect. We determine the pressure evolution of the magnetic exchange interaction between conduction and localized 4f electrons. It q...

Elasticity of MgO and a primary pressure scale to 55 GPa.

We have studied the elasticity and pressure-density equation of state of MgO in diamond cells to 55 GPa and have doubled the previous pressure limit of accurate elasticity determinations for crystals. Integrating single-crystal velocity data from Brillouin scattering measurements and density data from polycrystalline x-ray diffraction, we obtained the three principal elastic tensor elements (C(...