title: Nesting-driven multipolar order in CeB6 from photoemission tomography.
abstract: Some heavy fermion materials show so-called hidden-order phases which are invisible to many characterization techniques and whose microscopic origin remained controversial for decades. Among such hidden-order compounds, CeB6 is of model character due to its simple electronic configuration and crystal structure. Apart from more conventional antiferromagnetism, it shows an elusive phase at low temperatures, which is commonly associated with multipolar order. Here we show that this phase roots in a Fermi surface instability. This conclusion is based on a full 3D tomographic sampling of the electronic structure by angle-resolved photoemission and comparison with inelastic neutron scattering data. The hidden order is mediated by itinerant electrons. Our measurements will serve as a paradigm for the investigation of hidden-order phases in f-electron systems, but also generally for situations where the itinerant electrons drive orbital or spin order.
authors.affiliation: Institute for Solid State Research, IFW-Dresden, PO Box 270116, D-01171 Dresden, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Koitzsch
authors.affiliation: Institute for Solid State Research, IFW-Dresden, PO Box 270116, D-01171 Dresden, Germany.
authors.forename: N
authors.initials: N
authors.lastname: Heming
authors.affiliation: Institute for Solid State Research, IFW-Dresden, PO Box 270116, D-01171 Dresden, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Knupfer
authors.affiliation: Institute for Solid State Research, IFW-Dresden, PO Box 270116, D-01171 Dresden, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Büchner
authors.affiliation: Institut für Festkörperphysik, TU Dresden, D-01069 Dresden, Germany.
authors.forename: P Y
authors.initials: PY
authors.lastname: Portnichenko
authors.affiliation: I.M. Frantsevich Institute for Problems of Materials Science of NAS, 3 Krzhyzhanovsky str., Kiev 03680, Ukraine.
authors.forename: A V
authors.initials: AV
authors.lastname: Dukhnenko
authors.affiliation: I.M. Frantsevich Institute for Problems of Materials Science of NAS, 3 Krzhyzhanovsky str., Kiev 03680, Ukraine.
authors.forename: N Y
authors.initials: NY
authors.lastname: Shitsevalova
authors.affiliation: I.M. Frantsevich Institute for Problems of Materials Science of NAS, 3 Krzhyzhanovsky str., Kiev 03680, Ukraine.
authors.forename: V B
authors.initials: VB
authors.lastname: Filipov
authors.affiliation: Paul Scherrer Institut, Swiss Light Source, CH-5232 Villigen PSI, Switzerland.|National Research Centre Kurchatov Institute, 123182 Moscow, Russia.
authors.forename: L L
authors.initials: LL
authors.lastname: Lev
authors.affiliation: Paul Scherrer Institut, Swiss Light Source, CH-5232 Villigen PSI, Switzerland.
authors.forename: V N
authors.initials: VN
authors.lastname: Strocov
authors.affiliation: Institut Laue-Langevin, 6 rue Jules Horowitz, BP 156, 38042 Grenoble Cedex, France.
authors.forename: J
authors.initials: J
authors.lastname: Ollivier
authors.affiliation: Institut für Festkörperphysik, TU Dresden, D-01069 Dresden, Germany.
authors.forename: D S
authors.initials: DS
authors.lastname: Inosov
mesh_terms: D002563:Cerium / Q000737:chemistry*; D003460:Crystallization; D004583:Electrons; D006878:Hydroxides / Q000737:chemistry*; D008280:Magnetics; D008956:Models, Chemical; D009502:Neutrons; D013696:Temperature; D014057:Tomography, X-Ray Computed
chemical_list: D006878:Hydroxides; D002563:Cerium; C048873:cerium hydroxide