Spin-Peierls transition in TiPO$_4$
| Autor: | Law, J. M., Hoch, C., Glaum, R., Heinmaa, I., Stern, R., Kang, J., Lee, C., Whangbo, M. -H., Kremer, R. K. |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 83, 180414 (2011) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.83.180414 |
| Popis: | 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. Comment: 4 pages, 3 figures, accepted by Phys. Rev. B as a Rapid Communication |
| Databáze: | arXiv |
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