报告题目：Spin Crossover Systems in the deep mantle

报 告 人：Renata M. Wentzcovitch，Department of Chemical Engineering and Materials Science, University of Minnesota

报告时间：2016年11月24日10：00

报告地点：理科楼C302报告厅

报告摘要：There has been much interest in spin crossovers found experimentally in the most abundant minerals of Earth’s lower mantle ((MgFe)O and (MgFe)(Si,Fe)O3-perovskite) under pressure. Spin crossovers depend strongly on thermodynamic conditions and a full understanding of this problem requires its investigation as function of pressure and temperature. There are several controversies, especially in the perovskite systems, and surprises are revealed by electronic structure calculations. The geophysical consequences of these crossovers are yet to be fully understood. I will review progress we have made in understanding spin crossovers and give an overview of this phenomenon and its potential implications for the Earth.

Research supported by the US National Science Foundation.