Interference of a first-order transition with the formation of a spin-Peierls state in alpha'-NaV2O5?

Preprint

17 October 1997

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9710183

Abstract

We present results of high-resolution thermal-expansion and specific-heat measurements on single crystalline alpha'-NaV2O5. We find clear evidence for two almost degenerate phase transitions associated with the formation of the dimerized state around 33K: A sharp first-order transition at T1=(33+-0.1)K slightly below the onset of a second-order transition at T2onset around (34+-0.1)K. The latter is accompanied by pronounced spontaneous strains. Our results are consistent with a structural transformation at T1 induced by the incipient spin-Peierls (SP) order parameter above T2=TSP.

Keywords

STRUCTURAL TRANSFORMATION
PHASE TRANSITIONS
CRYSTALLINE ALPHA
PEIERLS STATE
SPIN PEIERLS
TRANSITION
NAV2O5
ORDER
TSP

All Related Versions

Version 1, 1997-10-17, ArXiv
Published version: Physical Review B, 57 (14), 8466.

This publication has 0 references indexed in Scilit: