title: Quantum phase transition in quasi-one-dimensional BaRu6O12.
abstract: We report the first systematic study of the electrical transport and magnetic properties of BaRu6O12, which has a quasi-one-dimensional (quasi-1D) hollandite structure. We show that BaRu6O12 is quasi-1D electronically as well. Its physical properties were found to be extremely sensitive to disorder. Furthermore, a transition from being metallic with a resistance drop around 2 K to being weakly insulating as the applied magnetic field was increased was also found. We propose that these two features are related to the possible presence of a quantum phase transition in this material system.
authors.affiliation: Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Mao
authors.forename: T
authors.initials: T
authors.lastname: He
authors.forename: M M
authors.initials: MM
authors.lastname: Rosario
authors.forename: K D
authors.initials: KD
authors.lastname: Nelson
authors.forename: D
authors.initials: D
authors.lastname: Okuno
authors.forename: B
authors.initials: B
authors.lastname: Ueland
authors.forename: I G
authors.initials: IG
authors.lastname: Deac
authors.forename: P
authors.initials: P
authors.lastname: Schiffer
authors.forename: Y
authors.initials: Y
authors.lastname: Liu
authors.forename: R J
authors.initials: RJ
authors.lastname: Cava