Ground-State Phase Diagram for the Three-Dimensional Orthogonal-Dimer System

Details Ground-State Phase Diagram for the Three-Dimensional Orthogonal-Dimer System Ground-State Phase Diagram for the Three-Dimensional Orthogonal-Dimer System

2000-09-18

arxiv.org/abs/cond-mat/0009266v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, submmited to J. Phys. Soc. Jpn

Scientific paper

10.1143/JPSJ.69.3509

We investigate quantum phase transitions in the three-dimensional orthogonal-dimer system of the compound $\rm SrCu_2(BO_3)_2$ by means of the series expansion technique. We then discuss the phase diagram where the dimer phase, the Haldane phase, the frustration-induced disordered phase and the magnetically ordered phase compete with each other. It is found that the compound $\rm SrCu_2(BO_3)_2$ is located in the dimer phase close to the phase boundary.

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