Journal articles
Nature of the High-Pressure Transition in Fe2O3 Hematite
Abstract : We present a new method to separate the crystallographic and electronic phase transitions in hematite using x-ray emission spectroscopy and x-ray diffraction. Our observations, based on the behavior of a metastable high-pressure phase in the stability domain of the low-pressure phase, show that the electronic transition is preempted by the crystallographic transition. The former occurs only afterwards in the high-pressure phase, possibly as a result of a Mott transition. The idea that the electronic transition drives the transition in hematite is therefore invalidated. Such methods should help elucidate the mechanics and the driving forces behind a number of first-order high-pressure phase transitions.
Cited literature [13 references]
https://hal-insu.archives-ouvertes.fr/insu-01387452
Contributor : Eva Fareau Connect in order to contact the contributor
Submitted on : Tuesday, October 25, 2016 - 3:48:27 PM
Last modification on : Tuesday, October 19, 2021 - 6:59:37 PM
Contributor : Eva Fareau Connect in order to contact the contributor
Submitted on : Tuesday, October 25, 2016 - 3:48:27 PM
Last modification on : Tuesday, October 19, 2021 - 6:59:37 PM
File
PhysRevLett.89.205504.pdf
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