Pressure-induced spin-Peierls to incommensurate charge-density-wave transition in the ground state of TiOCl
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Prodi-2010-Pressure-induced spi.pdf
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Author(s)
Lee, Young S.
Prodi, A.
Helton, Joel S.
Feng, Yejun
Date Issued
May 2010
Journal
Physical Review B
Publisher
American Physical Society
Citation
Prodi, A. et al. “Pressure-induced spin-Peierls to incommensurate charge-density-wave transition in the ground state of TiOCl.” Physical Review B 81.20 (2010): 201103. © 2010 The American Physical Society.
Version
Final published version
Abstract
The ground state of the spin-Peierls system TiOCl was probed using synchrotron x-ray diffraction on a single-crystal sample at T=6 K. We tracked the evolution of the structural superlattice peaks associated with the dimerized ground state as a function of pressure. The dimerization along the b axis is rapidly suppressed in the vicinity of a first-order structural phase transition at P[subscript C]=13.1(1) GPa. The high-pressure phase is characterized by an incommensurate charge-density wave perpendicular to the original spin-chain direction. These results show that the electronic ground state undergoes a fundamental change in symmetry, indicating a significant change in the principal interactions.
MIT Department
MIT Materials Research Laboratory
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.81.201103
