Quantum criticality and the suppression of the heavy fermion state in UBe13 by high magnetic fields

• Published in: Philosophical magazine (2003. Print) Vol. 89; no. 22-24; pp. 1839 - 1843
• Main Authors: Schmiedeshoff, G.M., Smith, J.L.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Abingdon Taylor & Francis Group 01.01.2009; Taylor & Francis
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electron states; Electronic conduction in metals and alloys; Electronic transport in condensed matter; Exact sciences and technology; heavy fermions; non-Fermi liquid; Physics; quantum critical point; resistivity; superconductivity; Theories and models of many electron systems; Electrical conductivity; Quantum phase transition; Superconductivity; Magnetic field effects; Photoinduced effect; Heavy fermions; Critical field; Beryllium alloys; Monocrystals; Superconductors; High field; Electric resistivity; Uranium alloys; Fermi liquid
• ISSN: 1478-6435; 1478-6443
• DOI: 10.1080/14786430902893171

We have measured the electrical resistivity of a single crystal of UBe 13 below 1 K and in high magnetic fields to 33 T. The resistivity exhibits the T 2 dependence characteristic of a Fermi liquid at low temperatures. The field dependence of the coefficient of the T 2 term in the resistivity suggests that the heavy fermion state is suppressed by high magnetic fields. We discuss these results in light of a proposed field-induced quantum critical point immersed in the novel superconducting state of this compound.