Journal
PHYSICAL REVIEW LETTERS
Volume 109, Issue 26, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.267206
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Funding
- Sloan Foundation
- NSERC
- CFI
- ACS
- Tokyo Tech
- Ministry of Education, Culture, Sports, Science, and Technology of Japan
- National Science Foundation [DMR-0944772]
- U.S. Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division
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Using magnetic, thermal, and neutron measurements on single-crystal samples, we show that Ba3CoSb2O9 is a spin-1/2 triangular-lattice antiferromagnet with the c axis as the magnetic easy axis and two magnetic phase transitions bracketing an intermediate up-up-down phase in magnetic field applied along the c axis. A pronounced extensive neutron-scattering continuum above spin-wave excitations, observed below T-N, implies that the system is in close proximity to one of two spin-liquid states that have been predicted for a 2D triangular lattice. DOI: 10.1103/PhysRevLett.109.267206
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