Metallic State in Cubic FeGe beyond its Quantum Phase Transition

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 ($T_C=280$ K) is suppressed at a critical pressure $p_c\approx 19$ GPa. An anomaly in the resistivity data 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 structural disorder due to zero-point motion is included. Discontinuous changes in the pressure dependence of the shortest Fe-Ge interatomic distance occurring close to the $T_C(p)$ phase line could be interpreted as a symmetry-conserving transition of first order.

4 pages, 4 figures

References in corpus (10)

• Spontaneous Skyrmion Ground States in Magnetic Metals
• Spin-fluctuation dominated electrical transport of Ni3Al at high pressure
• Electronic structure and properties of pure and doped $\epsilon$-FeSi from ab-initio local density theory
• First-order transition between a small-gap semiconductor and a ferromagnetic metal in the isoelectronic alloys FeSi${}_{1-x}$Ge${}_x$
• First order transition from correlated electron semiconductor to ferromagnetic metal in single crystalline FeSi1-xGex
• Phase Inhomogeneity of the Itinerant Ferromagnet MnSi at High Pressures
• Enhanced Impurity Scattering due to Quantum Critical Fluctuations
• Probing the extended non-Fermi liquid regimes of MnSi and Fe
• The quantum phase transition of itinerant helimagnets
• Electronic structure and magnetism for FeSi${}_{(1-x)}$Ge${}_x$ from supercell calculations

Cited by in corpus (38)

• Quantum Criticality in Heavy Fermion Metals
• Precursor phenomena at the magnetic ordering of the cubic helimagnet FeGe
• Magnetic phase diagram of MnSi inferred from magnetization and ac susceptibility
• Chiral Skyrmionic matter in non-centrosymmetric magnets
• Magnetic phase transitions in single crystals of the chiral helimagnet Cr1/3NbS2
• Chirality induced anomalous-Hall effect in helical spin crystals
• Scattering mechanisms in textured FeGe thin films: magnetoresistance and the anomalous Hall effect
• Uniaxial pressure dependence of magnetic order in MnSi
• Thermoelectricity in correlated narrow-gap semiconductors
• Topological domain walls in helimagnets
• Manipulation of the spin helix in FeGe thin films and FeGe/Fe multilayers
• Dramatic pressure-driven enhancement of bulk skyrmion stability
• Magnetism in Nb(1-y)Fe(2+y) - composition and magnetic field dependence
• Magnetoelectric effects in single crystals of the cubic ferrimagnetic helimagnet Cu2OSeO3
• Skyrmion Topological Hall Effect near Room Temperature
• Scaling Study and Thermodynamic Properties of the cubic Helimagnet FeGe
• Colloquium: Quantum Properties and Functionalities of Magnetic Skyrmions
• Magnetic ground state and spin fluctuations in MnGe chiral magnet as studied by Muon Spin Rotation
• Screw dislocations in cubic chiral magnets
• Bose-Luttinger Liquids
• Non-analytic behavior of 2D itinerant ferromagnets
• The role of thermal disorder for magnetism and the $\alpha -\gamma$ transition in Cerium; Results from density-functional theory
• Effects of thermal- and spin- fluctuations on the band structure of purple bronze Li${}_2$Mo${}_{12}$O${}_{34}$
• Anomalous Fermi liquid phase in metallic Skyrmion crystals
• Structural investigations on $\epsilon$-FeGe at high pressure and low temperature
• The importance of thermal disorder and electronic occupation for the T-dependence of the optical conductivity in FeSi and MnSi
• A microscopic model for spiral ordering along (110) on the MnSi lattice
• Thermal Stability of Skyrmion Tubes in Nanostructured Cuboids
• Optical evidence for heavy charge carriers in FeGe
• Monte Carlo simulations on rare-earth Holmium ultra-thin films
• Micromagnetic description of twisted spin spirals in the B20 chiral magnet FeGe from first principles
• Electronic structure and properties of superconducting materials with simple Fermi surfaces
• Interplay among helical order, surface effects and range of interacting layers in ultrathin films
• Magneto-elastic interaction in cubic helimagnets with B20 structure
• The behavior of f-levels in HCP and BCC rare-earth elements in the ground state and in XPS and BIS spectroscopy from density-functional theory
• Electronic structure, doping, order and disorder in cuprate superconductors
• Origin of the suppression of magnetic order in MnSi under hydrostatic pressure
• Calculated effects of disorder on the Mo core levels in purple bronze Li${}_2$Mo${}_{12}$O${}_{34}$