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Metallic State in Cubic FeGe Beyond Its Quantum Phase Transition

Schmidt, M.
Hanfland, M.
Akselrud, L.
Yuan, H.
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Published in Physical Review Letters. 2007, vol. 98, no. 4, p. 047204
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 is suppressed at a critical pressure 19 GPa. An anomaly 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 phase line.
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Research group Groupe Giamarchi
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PEDRAZZINI, Pablo et al. Metallic State in Cubic FeGe Beyond Its Quantum Phase Transition. In: Physical Review Letters, 2007, vol. 98, n° 4, p. 047204. https://archive-ouverte.unige.ch/unige:35635

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Deposited on : 2014-04-14

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