Kondo coherence in UBe sub 13 : Magnetoresistance at high pressure

Journal Article · Mon Nov 13 04:00:00 EST 1989 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.63.2311· OSTI ID:5249807

Aronson, M C; Thompson, J D; Smith, J L; Fisk, Z ^[1]; McElfresh, M W ^[2]

---

1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
2. IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598 (USA)

We have used resistance measurements at pressures to 95 kbar and magnetic fields to 8 T to probe the establishment of Kondo coherence in the heavy-fermion Kondo lattice UBe{sub 13}. With increasing pressure, the negative magnetoresistance characteristic of noninteracting Kondo impurities evolves into the positive magnetoresistance expected for a coherent Kondo lattice. We show that coherence is established by the suppression of inelastic scattering, over a temperature range which expands as pressure decreases the superconducting transition temperature {ital T}{sub {ital c}} and increases the Kondo temperature {ital T}{sub {ital k}}.

• OSTI ID: 5249807
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 63:20; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ACTINIDE ALLOYS
ALLOYS
BERYLLIUM ALLOYS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTARY PARTICLES
FERMIONS
HEAVY LEPTONS
INELASTIC SCATTERING
KONDO EFFECT
LEPTONS
LOW TEMPERATURE
MAGNETIC FIELDS
MAGNETORESISTANCE
PHYSICAL PROPERTIES
POSTULATED PARTICLES
PRESSURE DEPENDENCE
SCATTERING
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE
URANIUM ALLOYS
VERY HIGH PRESSURE
VERY LOW TEMPERATURE