Bulletin of the American Physical Society
2009 APS March Meeting
Volume 54, Number 1
Monday–Friday, March 16–20, 2009; Pittsburgh, Pennsylvania
Session Q13: Focus Session: Extreme Conditions and High Pressure II: Phase Transitions
11:15 AM–2:15 PM,
Wednesday, March 18, 2009
Sponsoring Units: DCOMP GSCCM
Chair: Amy Lazicki, Geophysical Laboratory
Abstract ID: BAPS.2009.MAR.Q13.4
Abstract: Q13.00004 : High Pressure-Temperature Studies of Vanadium*
11:51 AM–12:03 PM
Preview Abstract Abstract
Vanadium, a seemingly simple metal, has captured the interest of high-pressure scientists following the discovery (Ding et al. PRL 2007) of a subtle pressure-induced phase transition from bcc to a rhombohedral phase. Recent first-principles electronic-structure studies (Lee et al. PRB 2007) are consistent with these experiments and extend beyond the range of the measurements, predicting a reentrant phase transition back to bcc at high pressure. Further experiments in the regime of these predictions can validate and advance the understanding of simple metals at high-pressures. We have made x-ray diffraction measurements of the crystal structure and lattice parameters of vanadium at high-pressure and temperature. Detailed comparisons will challenge/validate models and guide development of predictive codes. We will discuss our measurements including high temperature behavior, the EOS, and transitions of vanadium at high pressure.
*This work performed under the auspices of the US DOE by LLNL under Contract DE-AC52-07NA27344. HPCAT use is supported by DOE-BES, DOE-NNSA, NSF, and the W.M. Keck Foundation. APS is supported by DOE-BES, under Contract No. DE-AC02-06CH11357.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2009.MAR.Q13.4
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