Commensurate fluctuations in the pseudogap and incommensurate spin-Peierls phases of TiOCl
Journal
Physical Review B - Condensed Matter and Materials Physics
Journal Volume
75
Journal Issue
10
Date Issued
2007
Author(s)
Abstract
X-ray scattering measurements on single crystals of TiOCl reveal the presence of commensurate dimerization peaks within both the incommensurate spin-Peierls phase and the so-called pseudogap phase above TC2. This scattering is relatively narrow in Q -space indicating long correlation lengths exceeding ∼100 Å below T* ∼130 K. It is also slightly shifted in Q relative to that of the commensurate long range ordered state at the lowest temperatures, and it coexists with the incommensurate Bragg peaks below TC2. The integrated scattering over both commensurate and incommensurate positions evolves continuously with decreasing temperature for all temperatures below T* ∼130 K. © 2007 The American Physical Society.
SDGs
Type
journal article