High temperature Jahn-Teller distortion and short-range order in CsCuCl3
Abstract
CsCuCl3, chiral and Jahn-Teller distorted at room temperature, takes a more symmetric structure above 423 K. Describing this 'simpler' high temperature structure is far from simple and has been the subject of many, sometimes contradicting, studies. Here we reinvestigate the high temperature structure of CsCuCl3, its thermal stability, and its effect on room temperature chirality. In situ pair distribution function data from powder neutron diffraction confirms that CsCuCl3 is Jahn-Teller distorted both below and above Tc, and provides a quantitative view of short-range order in the high temperature structure. In situ powder x-ray diffraction shows that CsCuCl3 does not undergo any additional structural changes above 423 K and is congruently melting. In situ single crystal x-ray diffraction experiments reveal that the phase transition induces domains of mixed handedness in originally homochiral crystals. These findings contribute to a better understanding of phase transitions in Jahn-Teller distorted compounds, and highlight the potential use of phase transitions to control chiral domains.
Related
- Jahn-Teller Distortion-Driven Lattice Parameter Tunability in Coherent High-Entropy Oxide Thin Films
- Mechanical behavior of a gradient short range order high entropy alloy
- Crossover duality for the quantum long-range Ising chain: perturbation theory around the short-range endpoint and a DMRG test
- Short-Range Tests of the Gravitational Inverse-Square Law
- Compositeness of near-threshold exotic hadrons in systems with Coulomb and short-range interactions
BibTeX
@misc{pappas2026high,
title = {{High temperature Jahn-Teller distortion and short-range order in CsCuCl$_3$}},
author = {Emma A. Pappas and Toby Woods and Jue Liu and Daniel P. Shoemaker},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2605.28288},
eprint = {2605.28288},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2605.28288},
}
RIS
TY - UNPB
TI - High temperature Jahn-Teller distortion and short-range order in CsCuCl_3
AU - Emma A. Pappas
AU - Toby Woods
AU - Jue Liu
AU - Daniel P. Shoemaker
PY - 2026
DA - 2026/11/04
PB - arXiv
DO - 10.48550/arxiv.2605.28288
UR - https://arxiv.org/abs/2605.28288
AB - CsCuCl_3, chiral and Jahn-Teller distorted at room temperature, takes a more symmetric structure above 423 K. Describing this 'simpler' high temperature structure is far from simple and has been the subject of many, sometimes contradicting, studies. Here we reinvestigate the high temperature structure of CsCuCl_3, its thermal stability, and its effect on room temperature chirality. In situ pair distribution function data from powder neutron diffraction confirms that CsCuCl_3 is Jahn-Teller distorted both below and above T_c, and provides a quantitative view of short-range order in the high temperature structure. In situ powder x-ray diffraction shows that CsCuCl_3 does not undergo any additional structural changes above 423 K and is congruently melting. In situ single crystal x-ray diffraction experiments reveal that the phase transition induces domains of mixed handedness in originally homochiral crystals. These findings contribute to a better understanding of phase transitions in Jahn-Teller distorted compounds, and highlight the potential use of phase transitions to control chiral domains.
ER -