title: Magnetic field enhancement of heat transport in the 2D Heisenberg antiferromagnet K2V3O8.
abstract: The thermal conductivity and heat capacity of single crystals of the spin 1/2 quasi-2D Heisenberg antiferromagnet K(2)V(3)O(8) have been measured from 1.9 to 300 K in magnetic fields from 0 to 8 T. The zero field thermal conductivity data are consistent with resonant scattering of phonons by magnons near the zone boundary. Application of a magnetic field greater than 1 T, however, produces a new magnetic ground state with substantial heat transport by long wavelength magnons.
authors.affiliation: Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
authors.forename: B C
authors.initials: BC
authors.lastname: Sales
authors.forename: M D
authors.initials: MD
authors.lastname: Lumsden
authors.forename: S E
authors.initials: SE
authors.lastname: Nagler
authors.forename: D
authors.initials: D
authors.lastname: Mandrus
authors.forename: R
authors.initials: R
authors.lastname: Jin