Fermi surface instability and symmetry breaking in the heavy-fermion compound YbBiPt

Journal Article · Mon Jul 18 00:00:00 EDT 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.73.492· OSTI ID:7150709

Movshovich, R; Lacerda, A; Canfield, P C; Thompson, J D; Fisk, Z ^[1]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

We report resistivity measurements on the cubic heavy-fermion compound YbBiPt at ambient and hydrostatic pressures to [approx]6 kbar and in magnetic fields to 1 T. Resistivity anisotropy sets in below the phase-transition temperature [ital T][sub [ital c]]=0.4 K. We interpret a rise of resistivity below 0.4 K as due to partial gapping of the Fermi surface with the weak coupling energy gap of [Delta][sub 0]/[ital k][sub [ital B]][ital T][sub [ital c]]=1.65[plus minus]0.15. Effects of hydrostatic pressure and magnetic field on the phase transition and heat capacity data are consistent with a spin density wave formation in a very heavy electron band at [ital T]=0.4 K.

• OSTI ID: 7150709
• Journal Information: Physical Review Letters; (United States), Vol. 73:3; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH ALLOYS
ELECTRIC CONDUCTIVITY
PLATINUM ALLOYS
YTTERBIUM ALLOYS
ANISOTROPY
ELECTRONIC STRUCTURE
GROUND STATES
MAGNETIC FIELDS
MAGNETISM
PHASE DIAGRAMS
PRESSURE DEPENDENCE
SPECIFIC HEAT
SYMMETRY BREAKING
TERNARY ALLOY SYSTEMS
ALLOY SYSTEMS
ALLOYS
DIAGRAMS
ELECTRICAL PROPERTIES
ENERGY LEVELS
PHYSICAL PROPERTIES
PLATINUM METAL ALLOYS
RARE EARTH ALLOYS
THERMODYNAMIC PROPERTIES
360104* - Metals & Alloys- Physical Properties