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Chiral Phase Transition in Charge Ordered 1T-TiSe2
Journal article   Open access   Peer reviewed

Chiral Phase Transition in Charge Ordered 1T-TiSe2

John-Paul Castellan, Stephan Rosenkranz, Ray Osborn, Qing'an Li, K. E. Gray, X. Luo, U. Welp, Goran Karapetrov, J. P. C. Ruff and Jasper van Wezel
Physical review letters, v 110(19), pp 196404-196404
07 May 2013
DOI: https://doi.org/10.1103/PhysRevLett.110.196404
PMID: 23705726
url
https://doi.org/10.1103/physrevlett.110.196404View
Accepted (AM)Open Access (Publisher-Specific),  Open

Abstract

Physical Sciences Physics Physics, Multidisciplinary Science & Technology
It was recently discovered that the low-temperature, charge-ordered phase of 1T-TiSe2 has a chiral character. This unexpected chirality in a system described by a scalar order parameter could be explained in a model where the emergence of relative phase shifts between three charge density wave components breaks the inversion symmetry of the lattice. Here, we present experimental evidence for the sequence of phase transitions predicted by that theory, going from disorder to nonchiral and finally to chiral charge order. Employing x-ray diffraction, specific heat, and electrical transport measurements, we find that a novel phase transition occurs similar to 7 K below the main charge ordering transition in TiSe2, in agreement with the predicted hierarchy of charge-ordered phases.

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Domestic collaboration
International collaboration
Web of Science research areas
Physics, Multidisciplinary
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