Interplay of metamagnetic and structural transitions in Ca$_{2-x}$Sr$_x$RuO$_4$

Details Interplay of metamagnetic and structural transitions in Ca$_{2-x}$Sr$_x$RuO$_4$ Interplay of metamagnetic and structural transitions in Ca$_{2-x}$Sr$_x$RuO$_4$

2008-05-05

arxiv.org/abs/0805.0515v2

Eur. Phys. J. B 64, 185 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 7 figures

Scientific paper

10.1140/epjb/e2008-00298-2

Metamagnetism in layered ruthenates has been interpreted as a novel kind of quantum critical behavior. In an external magnetic field, Ca$_{2-x}$Sr$_x$RuO$_4$ undergoes a metamagnetic transition accompanied by a pronounced magnetostriction effect. In this paper we present a mean-field study for a microscopic model that naturally reproduces the key features of this system. The phase diagram calculated is equivalent to the experimental $T$-$x$ phase diagram. The presented model also gives a good basis to discuss the critical metamagnetic behavior measured in the system.

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