High pressures and the Kondo gap in Ce3Bi4Pt3

Thumbnail Image
Date
1997-03-15
Authors
Cooley, JC
Aronson, MC
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Authors
Person
Canfield, Paul
Distinguished Professor
Research Projects
Organizational Units
Organizational Unit
Physics and Astronomy
Physics and astronomy are basic natural sciences which attempt to describe and provide an understanding of both our world and our universe. Physics serves as the underpinning of many different disciplines including the other natural sciences and technological areas.
Organizational Unit
Ames National Laboratory

Ames National Laboratory is a government-owned, contractor-operated national laboratory of the U.S. Department of Energy (DOE), operated by and located on the campus of Iowa State University in Ames, Iowa.

For more than 70 years, the Ames National Laboratory has successfully partnered with Iowa State University, and is unique among the 17 DOE laboratories in that it is physically located on the campus of a major research university. Many of the scientists and administrators at the Laboratory also hold faculty positions at the University and the Laboratory has access to both undergraduate and graduate student talent.

Journal Issue
Is Version Of
Versions
Series
Abstract
We have measured the electrical resistivity p(T) of single crystals of Ce-3Bi4Pt3 for temperatures from 1.2 to 300 K, and pressures from I bar to 145 kbar. The transport is dominated at high temperatures by excitations across a small activation gap a, which increases rapidly with pressure. The low-temperature transport involves variable range hopping among extrinsic states in the gap. The spatial extent of the in-gap states reflects coupling to conduction-electron states, and is strongly modified as pressure enhances Delta. Despite the strong pressure dependence of Delta, a direct correspondence between single-ion energetics and the measured gap is maintained, and the role of valence fluctuations is minimal even at the highest pressures.
Comments
This article is published as Cooley, J. C., M. C. Aronson, and P. C. Canfield. "High pressures and the Kondo gap in Ce3Bi4Pt3." Physical Review B 55, no. 12 (1997): 7533. DOI: 10.1103/PhysRevB.55.7533. Copyright 1997 American Physical Society. Posted with permission.
Description
Keywords
Citation
DOI
Copyright
Collections