title: Field-induced thermal metal-to-insulator transition in underdoped La(2-x)Sr(x)CuO(4+delta).
abstract: The transport of heat and charge in cuprates was measured in single crystals of La(2-x)Sr(x)CuO(4+delta) (LSCO) across the doping phase diagram at low temperatures. In underdoped LSCO, the thermal conductivity is found to decrease with increasing magnetic field in the T-->0 limit, in striking contrast to the increase observed in all superconductors, including cuprates at higher doping. In heavily underdoped LSCO, where superconductivity can be entirely suppressed with an applied magnetic field, we show that a novel thermal metal-to-insulator transition takes place upon going from the superconducting state to the field-induced normal state.
authors.affiliation: Department of Physics, University of Toronto, Toronto, Ontario, Canada.
authors.forename: D G
authors.initials: DG
authors.lastname: Hawthorn
authors.forename: R W
authors.initials: RW
authors.lastname: Hill
authors.forename: C
authors.initials: C
authors.lastname: Proust
authors.forename: F
authors.initials: F
authors.lastname: Ronning
authors.forename: Mike
authors.initials: M
authors.lastname: Sutherland
authors.forename: Etienne
authors.initials: E
authors.lastname: Boaknin
authors.forename: C
authors.initials: C
authors.lastname: Lupien
authors.forename: M A
authors.initials: MA
authors.lastname: Tanatar
authors.forename: Johnpierre
authors.initials: J
authors.lastname: Paglione
authors.forename: S
authors.initials: S
authors.lastname: Wakimoto
authors.forename: H
authors.initials: H
authors.lastname: Zhang
authors.forename: Louis
authors.initials: L
authors.lastname: Taillefer
authors.forename: T
authors.initials: T
authors.lastname: Kimura
authors.forename: M
authors.initials: M
authors.lastname: Nohara
authors.forename: H
authors.initials: H
authors.lastname: Takagi
authors.forename: N E
authors.initials: NE
authors.lastname: Hussey