Publication Date:
2018-03-23
Description:
Author(s): Touru Yamauchi, Hiroaki Ueda, Kenji Ohwada, Hironori Nakao, and Yutaka Ueda A novel phase transition with a stepwise evolution of odd-number charge modulation is discovered in β -vanadium bronzes under pressures of about 1 GPa. All the charge modulation vectors of the many kinds of charge-ordered phases can be represented as a primitive lattice translation vector along the b axis multiplied by several odd numbers. This discovery demonstrates interplay between the charge degree of freedom and the crystallographic symmetry. This phenomenon is rationally explained by self-charge transfer (carrier redistribution) between two kinds of subsystems in the structure and sequential symmetry reduction as outlined in Landau theory of phase transitions. [Phys. Rev. B 97, 125138] Published Thu Mar 22, 2018
Keywords:
Electronic structure and strongly correlated systems
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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