Spin-Peierls transition in TiPO${}_4$

Abstract

We investigated the magnetic and structural properties of the quasi-one dimensional 3$d^1$-quantum chain system TiPO${}_4$ ($J\sim$ 965 K) by magnetic susceptibility, heat capacity, ESR, x-ray diffraction, NMR measurements, and by density functional calculations. TiPO${}_4$ undergoes two magnetostructural phase transitions, one at 111 K and the other at 74 K. Below 74 K, NMR detects two different ${}^{31}$P signals and the magnetic susceptibility vanishes, while DFT calculations evidence a bond alternation of the Ti...Ti distances within each chain. Thus, the 74 K phase transition is a spin-Peierls transition which evolves from an incommensurate phase existing between 111 K and 74 K.

4 pages, 3 figures, accepted by Phys. Rev. B as a Rapid Communication

References in corpus (4)

• From high temperature supercondutivity to quantum spin liquid: progress in strong correlation physics
• Heat capacity of the quantum magnet TiOCl
• Microscopic model for transitions from Mott to spin-Peierls insulator in TiOCl
• Critical properties of the unconventional spin-Peierls system TiOBr

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• Coherent spin dynamics of solitons in the organic spin chain compounds ($o$-DMTTF)${}_{2}X$ ($X$ = Cl, Br)
• Lattice and orbital fluctuations in TiPO4
• Inverse pressure-induced Mott transition in TiPO${}_4$
• Orbital disorder and ordering in NaTiSi2O6: 29Si and 23Na NMR Study