Field-induced non-Fermi-liquid resistivity of stoichiometric YbAgGe single crystals

Abstract

We have investigated hexagonal YbAgGe down to 70 mK by measuring the magnetic-field and temperature dependence of the resistivity rho of single crystals in fields up to 14 T. Our results extend the H-T phase diagram to the lowest temperatures for H applied in the basal plane and along the c-axis. In particular, critical fields for the suppression of several magnetic phases are determined. The temperature dependence of rho(T) is unusual: whereas at low H, rho(T) reveals a temperature exponent n>=2, we find 1<=n<1.5 and strong enhancement of the temperature dependence of rho(T) close to and beyond the highest critical field for each field direction. For H applied in the basal plane, at high fields a conventional T^2 dependence of rho(T) is reached above 10 T accompanied by an approach to saturation of a strong drop in the residual resistivity. YbAgGe appears to be one of few Yb-based stoichiometric systems, where quantum-critical behaviour may be induced by a magnetic field.

arXiv comment11 pages, 12 figures; revised version; accepted for publication in Phys.Rev.B

References in corpus (16)

• The break up of heavy electrons at a quantum critical point
• Onset of antiferromagnetism in heavy fermion metals
• Hall-effect evolution across a heavy-fermion quantum critical point
• Magnetic-Field Induced Quantum Critical Point in YbRh${}_2$Si${}_2$
• Field-Induced Quantum Critical Point in CeCoIn5
• Resistivity as a function of temperature for models with hot spots on the Fermi surface.
• Interplay of disorder and spin fluctuations in the resistivity near a quantum critical point
• A mechanism for the non-Fermi-liquid behavior in CeCu_{6-x}Au_x
• Magnetic Field Induced Non-Fermi-Liquid Behavior in YbAgGe Single Crystal
• A Hierarchically-Organized Phase Diagram near a Quantum Critical Point in URu2Si2
• Thermodynamic and transport properties of RAgGe (R=Tb-Lu) single crystals
• Magnetotransport in nearly antiferromagnetic metals
• Itinerant metamagnetism of CeRu2Si2 : bringing out the dead. Comparison with the new Sr3Ru2O7 case
• Anisotropic Hall Effect in Single Crystal Heavy Fermion YbAgGe
• Inelastic neutron scattering study of single crystal heavy fermion YbAgGe
• Spin Fluctuation and Crystal Field Excitation of a Heavy Fermion Compound YbAgGe studied by Inelastic Neutron Scattering

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