Journal
PHYSICAL REVIEW LETTERS
Volume 103, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.103.047202
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Funding
- National Science Foundation, Division of Materials Research [DMR-0705087, DMR-0084173]
- Department of Energy, Office of Basic Energy Sciences [DE-AC02-76SF00515, DE-AC52-06NA25396]
- State of Florida
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Ba3Mn2O8 is a spin-dimer compound based on pairs of S = 1, 3d(2), Mn5+ ions arranged on a triangular lattice. Antiferromagnetic intradimer exchange leads to a singlet ground state in zero field, with excited triplet and quintuplet states at higher energy. High field thermodynamic measurements are used to establish the phase diagram, revealing a substantial asymmetry of the quintuplet condensate. This striking effect, all but absent for the triplet condensate, is due to a fundamental asymmetry in quantum fluctuations of the paramagnetic phases near the various critical fields.
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