Fermi surface instability at 0.4K in a heavy-fermion YbBiPt: SDW?

Conference · Sat Dec 31 00:00:00 EST 1994

OSTI ID:68423

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

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1. Los Alamos National Laboratory, NM (United States)

The authors report results of resistivity measurements of heavy-fermion compound YbBiPt at ambient and hydrostatic pressures of up to {approx}6kbars and in magnetic fields up to 1 Tesla. They interpret the rise of resistivity below 0.4K as partial gapping of the Fermi surface. From the temperature dependence of the resistivity they obtain the value of the weak coupling energy gap of {Delta}{sub 0}/k{sub B}T{sub c} = 1.65{+-}0.15. Magnetic field - transition temperature phase diagram follows the weak coupling BCS expression remarkably well from T{sub c} to T{sub c}/4. These results support identification of 0.4K transition as a Spin Density Wave formation.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• OSTI ID: 68423
• Report Number(s): LA-UR-94-1148; CONF-931247-; ON: DE94009293; TRN: 94:004697-0005
• Resource Relation: Conference: Strongly correlated electronic materials, Los Alamos, NM (United States), 15-18 Dec 1993; Other Information: PBD: [1994]; Related Information: Is Part Of Proceedings, strongly correlated electronic materials: The Los Alamos symposium 1993; Bedell, K.S.; PB: 662 p.
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
YTTERBIUM ALLOYS
PHASE TRANSFORMATIONS
BISMUTH ALLOYS
PLATINUM ALLOYS
FERMI LEVEL
ELECTRON CORRELATION