Fermionic spin excitations in two- and three-dimensional antiferromagnets
dc.contributor.author | Zhihao, Hao | |
dc.contributor.author | Tchernyshyov, Oleg | |
dc.date.accessioned | 2010-01-11T18:47:43Z | |
dc.date.available | 2010-01-11T18:47:43Z | |
dc.date.issued | 2009-10-30 | |
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_US |
dc.identifier.citation | Physical Review Letters 30 Oct. 2009, vol.103, no.18, 187203 (4 pp.) | en_US |
dc.identifier.uri | http://jhir.library.jhu.edu/handle/1774.2/33764 | |
dc.language.iso | en_US | en_US |
dc.publisher | American Physical Society | en_US |
dc.subject | ordered Heisenberg magnet | en_US |
dc.subject | 2D antiferromagnets | en_US |
dc.subject | spin fluctuations | en_US |
dc.subject | magnons | en_US |
dc.subject | quantum fluctuations | en_US |
dc.subject | spin-rotation symmetry | en_US |
dc.subject | fermion systems | en_US |
dc.subject | bosons | en_US |
dc.subject | antiferromagnetic materials | en_US |
dc.subject | Heisenberg antiferromagnet | en_US |
dc.subject | Kagome lattices | en_US |
dc.subject | spinons | en_US |
dc.subject | ground states | en_US |
dc.subject | magnetic excitations | en_US |
dc.title | Fermionic spin excitations in two- and three-dimensional antiferromagnets | en_US |
dc.type | Article | en_US |