Dec 4 2024

CDAC Seminar- “Quantum phenomena in iron in the Earth’s mantle and their macroscopic manifestation” with Prof. Renata M. M. Wentzcovitch

CDAC Webinar

December 4, 2024

1:00 PM - 2:00 PM

“Quantum phenomena in iron in the Earth’s mantle and their macroscopic manifestation"

Renata M. M. Wentzcovitch

Department of Applied Physics and Applied Mathematics

Department of Earth and Environmental Science

Lamont Doherty Earth Observatory, Columbia University

Abstract:

High-pressure and high-temperature experiments on strongly correlated iron-bearing minerals are crucial for understanding planetary interiors. Studies of iron-magnesium deep mantle silicates and oxides provide valuable insights into a quantum phenomenon known as iron spin crossover (ISC). ISC consists of a gradual change in iron's spin state under compression. Recent simultaneous investigations at high pressures and temperatures have yielded significant microscopic data on this phenomenon. I will review key experimental findings, compare them with ab initio predictions and thermodynamic models, demonstrate the macroscopic effects of ISC, and explore its potential signature in the Earth’s mantle.

Background:

https://www.apam.columbia.edu/faculty/renata-wentzcovitch

https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.6.013292

https://journals.aps.org/prb/abstract/10.1103/PhysRevB.109.094101

https://www.sciencedirect.com/science/article/abs/pii/S0012821X04003383

Upcoming and Previous CDAC Talks: 

https://cdac.phys.uic.edu/cdac-webinar-series/

Recorded CDAC Talks: 

https://www.youtube.com/channel/UCah_ErVY7qVCRief1WaF7hA?view_as=subscriber

Contact

Russell J. Hemley

Date posted

Dec 6, 2024

Date updated

Dec 6, 2024