Fermionic spin excitations in two- and three-dimensional antiferromagnets

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dc.contributor.author Zhihao, Hao
dc.contributor.author Tchernyshyov, O.
dc.date.accessioned 2010-01-11T18:47:43Z
dc.date.available 2010-01-11T18:47:43Z
dc.date.issued 2009-10-30
dc.identifier.citation Physical Review Letters 30 Oct. 2009, vol.103, no.18, 187203 (4 pp.) en
dc.identifier.uri http://jhir.library.jhu.edu/handle/1774.2/33764
dc.description.abstract Spin excitations in an ordered Heisenberg magnet are magnons-bosons with spin 1. That may change when frustration and quantum fluctuations suppress the order and restore the spin-rotation symmetry. We show that spin excitations in the S = 1/2 Heisenberg antiferromagnet on a kagome lattice are spinons-fermions with spin 1/2. In the ground state the system can be described as a collection of small, heavy pairs of spinons with spin 0. A magnetic excitation of lowest energy amounts to breaking up a pair into two spinons at a cost of 0.06 J. en
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dc.description.provenance Made available in DSpace on 2010-01-11T18:47:43Z (GMT). No. of bitstreams: 1 Oleg Fermionic 2009.pdf: 249076 bytes, checksum: 4bb29cda2a70f0ac13698f25c7312638 (MD5) Previous issue date: 2009-10-30 en
dc.language.iso en_US en
dc.publisher American Physical Society en
dc.subject ordered Heisenberg magnet en
dc.subject 2D antiferromagnets en
dc.subject spin fluctuations en
dc.subject magnons en
dc.subject quantum fluctuations en
dc.subject spin-rotation symmetry en
dc.subject fermion systems en
dc.subject bosons en
dc.subject antiferromagnetic materials en
dc.subject Heisenberg antiferromagnet en
dc.subject Kagome lattices en
dc.subject spinons en
dc.subject ground states en
dc.subject magnetic excitations en
dc.title Fermionic spin excitations in two- and three-dimensional antiferromagnets en
dc.type Article en

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