“Devil’s staircase”-type phase transition in NaV2O5 under high pressure

K. Ohwada, Y. Fujii, N. Takesue, M. Isobe, Y. Ueda, H. Nakao, Y. Wakabayashi, Y. Murakami, K. Ito, Y. Amemiya, H. Fujihisa, K. Aoki, T. Shobu, Y. Noda, N. Ikeda

Research output: Contribution to journalArticle

Abstract

The “Devil’s staircase”-type phase transition in the quarter-filled spin-ladder compound NaV2O5 has been discovered at low temperature and high pressure by synchrotron radiation x-ray diffraction. A large number of transitions are found to successively take place among higher-order commensurate phases with 2a × 2b × zc type superstructures. The observed temperature and pressure dependence of modulation wave number qc, defined by 1/z, is well reproduced by the axial next nearest neighbor Ising model. The qc is suggested to reflect atomic displacements presumably coupled with charge ordering in this system.

Original languageEnglish
Pages (from-to)86402-1-86402-4
JournalPhysical Review Letters
Volume87
Issue number8
DOIs
Publication statusPublished - 2001 Aug 20
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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