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Spin-Peierls transition in TiOCl

Title data

Shaz, Mohammad ; van Smaalen, Sander ; Palatinus, Lukas ; Hoinkis, Markus ; Klemm, Matthias ; Horn, Siegfried ; Claessen, Ralph:
Spin-Peierls transition in TiOCl.
In: Physical Review B. Vol. 71 (2005) Issue 10 . - p. 100405.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.71.100405

Official URL: Volltext

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

Temperature-dependent x-ray diffraction of the low-dimensional spin-1∕2 quantum magnet TiOCl shows that the phase transition at Tc2=90K corresponds to a lowering of the lattice symmetry. Below Tc1=66K a twofold superstructure develops, that indicates the formation of spin-singlet pairs via direct exchange between neighboring Ti atoms, while the role of superexchange is found to be negligible. TiOCl thus is identified as a spin-Peierls system of pure one-dimensional chains of atoms. The first-order character of the transition at Tc1 is explained by the competition between the structurally deformed state below Tc2 and the spin-Peierls state below Tc1.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography
Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography > Chair Crystallography - Univ.-Prof. Dr. Sander van Smaalen
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 16 Mar 2016 10:51
Last Modified: 24 Mar 2016 09:18
URI: https://eref.uni-bayreuth.de/id/eprint/31851