Pressure-induced dimerization and valence bond crystal formation in the Kitaev-Heisenberg magnet alpha-RuCl3 release_5ft7wlxzwjaenbbdjpvtihtez4

by G. Bastien, G. Garbarino, R. Yadav, F. J. Martinez-Casado, R. Beltrán Rodríguez, Q. Stahl, M. Kusch, S. P. Limandri, R. Ray, P. Lampen-Kelley, D. G. Mandrus, S. E. Nagler (+7 others)

Released as a article .

2018  

Abstract

Magnetization and high-resolution x-ray diffraction measurements of the Kitaev-Heisenberg material alpha-RuCl3 reveal a pressure-induced crystallographic and magnetic phase transition at a hydrostatic pressure of p=0.2 GPa. This structural transition into a triclinic phase is characterized by a very strong dimerization of the Ru-Ru bonds, accompanied by a collapse of the magnetic susceptibility. Ab initio quantum-chemistry calculations disclose a pressure-induced enhancement of the direct 4d-4d bonding on particular Ru-Ru links, causing a sharp increase of the antiferromagnetic exchange interactions. These combined experimental and computational data show that the Kitaev spin liquid phase in alpha-RuCl3 strongly competes with the crystallization of spin singlets into a valence bond solid.
In text/plain format

Archived Files and Locations

application/pdf  821.4 kB
file_qs64pn4mmrbwnhlr4knrkps4sm
arxiv.org (repository)
web.archive.org (webarchive)
Read Archived PDF
Archived
Type  article
Stage   accepted
Date   2018-06-28
Version   v2
Language   en ?
arXiv  1802.09861v2
Work Entity
access all versions, variants, and formats of this works (eg, pre-prints)
Catalog Record
Revision: ee75088e-2a8f-4c65-b6e2-d3b052bad37d
API URL: JSON