"Devil's staircase"-type phase transition in NaV2O5 under high pressure - art. no. 086402

Authors
Ohwada, K Fujii, Y Takesue, N Isobe, M Ueda, Y Nakao, H Wakabayashi, Y Murakami, Y Ito, K Amemiya, Y Fujihisa, H Aoki, K Shobu, T Noda, Y Ikeda, N
Citation
K. Ohwada et al., "Devil's staircase"-type phase transition in NaV2O5 under high pressure - art. no. 086402, PHYS REV L, 8708(8), 2001, pp. 6402
Citations number
24
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
8708
Issue
8
Year of publication
2001
Database
ISI
SICI code
0031-9007(20010820)8708:8<6402:"SPTIN>2.0.ZU;2-P
Abstract
The "devil's staircase"-type phase transition in the quarter-filled spin-la dder compound NaV2O5 has been discovered at low temperature and high pressu re by synchrotron radiation x-ray diffraction. A large number of transition s are found to successively take place among higher-order commensurate phas es with 2a x 2b x zc type superstructures. The observed temperature and pre ssure dependence of modulation wave number q(c). defined by 1/z. is well re produced by the axial next nearest neighbor Ising model. The q(c) is sugges ted to reflect atomic displacements presumably coupled with charge ordering in this system.