Magnetic field-induced phase transitions in a weakly coupled s = 1/2 quantum spin dimer system Ba$_{3}$Cr$_{2}$O$_{8}$

M. Kofu; H. Ueda; H. Nojiri; Y. Oshima; T. Zenmoto; K. Rule; S. Gerischer; B. Lake; C. D. Batista; Y. Ueda; S. -H. Lee

doi:10.1103/PhysRevLett.102.177204

Magnetic field-induced phase transitions in a weakly coupled s = 1/2 quantum spin dimer system Ba$_{3}$Cr$_{2}$O$_{8}$

Strongly Correlated Electrons 2015-05-13 v2

Authors: M. Kofu , H. Ueda , H. Nojiri , Y. Oshima , T. Zenmoto , K. Rule , S. Gerischer , B. Lake , C. D. Batista , Y. Ueda , S. -H. Lee

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Abstract

By using bulk magnetization, electron spin resonance (ESR), heat capacity, and neutron scattering techniques, we characterize the thermodynamic and quantum phase diagrams of Ba $_3$ Cr $_2$ O $_8$ . Our ESR measurements indicate that the low field paramagnetic ground state is a mixed state of the singlet and the S $_z$ = 0 triplet for $H \perp c$ . This suggests the presence of an intra-dimer Dzyaloshinsky-Moriya (DM) interaction with a DM vector perpendicular to the c-axis.

Keywords

quantum spin dimer magnetic field-induced phase transition Dzyaloshinsky-Moriya interaction electron spin resonance quantum phase diagram Ba3Cr2O8

Cite

@article{arxiv.0902.4229,
  title  = {Magnetic field-induced phase transitions in a weakly coupled s = 1/2 quantum spin dimer system Ba$_{3}$Cr$_{2}$O$_{8}$},
  author = {M. Kofu and H. Ueda and H. Nojiri and Y. Oshima and T. Zenmoto and K. Rule and S. Gerischer and B. Lake and C. D. Batista and Y. Ueda and S. -H. Lee},
  journal= {arXiv preprint arXiv:0902.4229},
  year   = {2015}
}

Magnetic field-induced phase transitions in a weakly coupled s = 1/2 quantum spin dimer system Ba$_{3}$Cr$_{2}$O$_{8}$

Abstract

Keywords

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