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Metallic State in Cubic FeGe Beyond Its Quantum Phase Transition

DOI: 10.1103/PhysRevLett.98.047204 DOI Help
PMID: 17358807 PMID Help

Authors: P. Pedrazzini (University of Geneva, Switzerland) , H Wilhelm (Diamond Light Source) , D. Jaccard (University of Geneva, Switzerland) , T. Jarlborg (University of Geneva, Switzerland) , M. Schmidt (Max Planck Institute for Chemical Physics of Solids, Germany) , M. Hanfland (ESRF) , L. Akselrud (Ivan Franko Lviv National University, Ukraine) , H. Yuan (Max Planck Institute for Chemical Physics of Solids, Germany) , U. Schwarz (Max Planck Institute for Chemical Physics of Solids, Germany) , Yu. Grin (Max Planck Institute for Chemical Physics of Solids, Germany) , F. Steglich (Max Planck Institute for Chemical Physics of Solids, Germany)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Letters , VOL 98 (4)

State: Published (Approved)
Published: January 2007

Abstract: We report on results of electrical resistivity and structural investigations on the cubic modification of FeGe under high pressure. The long-wavelength helical order (TC=280  K) is suppressed at a critical pressure pc≈19  GPa. An anomaly at TX(p) and strong deviations from a Fermi-liquid behavior in a wide pressure range above pc suggest that the suppression of TC disagrees with the standard notion of a quantum critical phase transition. The metallic ground state persisting at high pressure can be described by band-structure calculations if zero-point motion is included. The shortest FeGe interatomic distance display discontinuous changes in the pressure dependence close to the TC(p) phase line.

Subject Areas: Physics

Facility: ESRF

Added On: 07/08/2010 08:54

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