title: Thermal conductivity of geometrically frustrated, ferroelectric YMnO3: extraordinary spin-phonon interactions.
abstract: The thermal conductivity of the magnetically frustrated, ferroelectric YMnO3 exhibits an isotropic suppression in the cooperative paramagnetic state, followed by a sudden increase upon magnetic ordering. This unprecedented behavior without an associated static structural distortion probably originates from the strong dynamic coupling between acoustic phonons and low-energy spin fluctuations in geometrically frustrated magnets. The replacement of magnetic Ho for Y at the ferroelectrically active site results in an even larger effect, suggestive of the strong influence of multiferroicity.
authors.affiliation: Department of Physics & Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA.
authors.forename: P A
authors.initials: PA
authors.lastname: Sharma
authors.forename: J S
authors.initials: JS
authors.lastname: Ahn
authors.forename: N
authors.initials: N
authors.lastname: Hur
authors.forename: S
authors.initials: S
authors.lastname: Park
authors.forename: Sung Baek
authors.initials: SB
authors.lastname: Kim
authors.forename: Seongsu
authors.initials: S
authors.lastname: Lee
authors.forename: J-G
authors.initials: JG
authors.lastname: Park
authors.forename: S
authors.initials: S
authors.lastname: Guha
authors.forename: S-W
authors.initials: SW
authors.lastname: Cheong