Spontaneous Spin Ordering of a Dirac Spin Liquid in a Magnetic Field

Author(s)
Lee, Patrick A.; Ko, Wing Ho; Wen, Xiao-Gang; Ran, Ying
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Abstract
The Dirac spin liquid was proposed to be the ground state of the spin-1/2 kagomé antiferromagnets. In a magnetic field B, we show that the state with Fermi pocket is unstable to the Landau level (LL) state. The LL state breaks the spin rotation around the axis of the magnetic field. We find that the LL state has an in-plane 120° q=0 magnetization M which scales with the external field M∼B[subscript α], where α is a universal number of the Dirac spin liquid. We discuss the related experimental implications which can be used to detect the possible Dirac spin liquid phase in herbertsmithite ZnCu[subscript 3](OH)[subscript 6]C[subscript l2].
Date issued
2009-01
URI
http://hdl.handle.net/1721.1/51342
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Ran, Ying et al. “Spontaneous Spin Ordering of a Dirac Spin Liquid in a Magnetic Field.” Physical Review Letters 102.4 (2009): 047205. (C) 2010 The American Physical Society.
Version: Final published version
ISSN
0031-9007
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