Metallic state in cubic FeGe beyond its quantum phase transition.
- Pedrazzini P DPMC, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Genève 4, Switzerland.
- Wilhelm H
- Jaccard D
- Jarlborg T
- Schmidt M
- Hanfland M
- Akselrud L
- Yuan HQ
- Schwarz U
- Grin Y
- Steglich F
- 2007-03-16
Published in:
- Physical review letters. - 2007
English
We report on results of electrical resistivity and structural investigations on the cubic modification of FeGe under high pressure. The long-wavelength helical order (T(C) = 280 K) is suppressed at a critical pressure p(c) approximately 19 GPa. An anomaly at T(X)(p) and strong deviations from a Fermi-liquid behavior in a wide pressure range above p(c) suggest that the suppression of T(C) 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 T(C)(p) phase line.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1103/PhysRevLett.98.047204
- PMID 17358807
- Persistent URL
- https://folia.unifr.ch/global/documents/220048
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