title: Magnetic frustration, short-range correlations and the role of the paramagnetic Fermi surface of PdCrO2.
abstract: Frustrated interactions exist throughout nature, with examples ranging from protein folding through to frustrated magnetic interactions. Whilst magnetic frustration is observed in numerous electrically insulating systems, in metals it is a rare phenomenon. The interplay of itinerant conduction electrons mediating interactions between localised magnetic moments with strong spin-orbit coupling is likely fundamental to these systems. Therefore, knowledge of the precise shape and topology of the Fermi surface is important in any explanation of the magnetic behaviour. PdCrO2, a frustrated metallic magnet, offers the opportunity to examine the relationship between magnetic frustration, short-range magnetic order and Fermi surface topology. By mapping the short-range order in reciprocal space and experimentally determining the electronic structure, we have identified the dual role played by the Cr electrons in which the itinerant ones on the nested paramagnetic Fermi surface mediate the frustrated magnetic interactions between local moments.
authors.affiliation: H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom.
authors.forename: David
authors.initials: D
authors.lastname: Billington
authors.affiliation: H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom.
authors.forename: David
authors.initials: D
authors.lastname: Ernsting
authors.affiliation: H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom.
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Millichamp
authors.affiliation: H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom.
authors.forename: Christopher
authors.initials: C
authors.lastname: Lester
authors.affiliation: H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom.
authors.forename: Stephen B
authors.initials: SB
authors.lastname: Dugdale
authors.affiliation: Department of Physics, University of Warwick, Coventry, CV4 7AL, United Kingdom.
authors.forename: David
authors.initials: D
authors.lastname: Kersh
authors.affiliation: Department of Physics, University of Warwick, Coventry, CV4 7AL, United Kingdom.
authors.forename: Jonathan A
authors.initials: JA
authors.lastname: Duffy
authors.affiliation: School of Physics and Astronomy, Cardiff University, Queen's Building, The Parade, Cardiff, CF24 3AA, United Kingdom.
authors.forename: Sean R
authors.initials: SR
authors.lastname: Giblin
authors.affiliation: 1] DMSC - European Spallation Source, Universitetsparken 1, Copenhagen 2100, Denmark [2] ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, United Kingdom.
authors.forename: Jonathan W
authors.initials: JW
authors.lastname: Taylor
authors.affiliation: ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, United Kingdom.
authors.forename: Pascal
authors.initials: P
authors.lastname: Manuel
authors.affiliation: ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, United Kingdom.
authors.forename: Dmitry D
authors.initials: DD
authors.lastname: Khalyavin
authors.affiliation: Department of Physics, Tokyo Metropolitan University, Tokyo 192-0397, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Takatsu