Campus Units
Physics and Astronomy, Ames Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
8-15-2015
Journal or Book Title
Physical Review B
Volume
92
Issue
8
First Page
085135
DOI
10.1103/PhysRevB.92.085135
Abstract
We present quantum oscillations observed in the heavy-fermion compound YbPtBi in magnetic fields far beyond its field-tuned, quantum critical point. Quantum oscillations are observed in magnetic fields as low as 60 kOe at 60 mK and up to temperatures as high as 3 K, which confirms the very high quality of the samples as well as the small effective mass of the conduction carriers far from the quantum critical point. Although the electronic specific heat coefficient of YbPtBi reaches ∼7.4J/molK2 in zero field, which is one of the highest effective mass values among heavy-fermion systems, it is suppressed quickly by an applied magnetic field. The quantum oscillations were used to extract the quasiparticle effective masses of the order of the bare electron mass, which is consistent with the behavior observed in specific heat measurements. Such small effective masses at high fields can be understood by considering the suppression of Kondo screening.
Copyright Owner
American Physical Society
Copyright Date
2015
Language
en
File Format
application/pdf
Recommended Citation
Mun, E.; Bud’ko, Sergey L.; Lee, Y.; Martin, C.; Tanatar, Makariy A.; Prozorov, Ruslan; and Canfield, Paul C., "Quantum oscillations in the heavy-fermion compound YbPtBi" (2015). Physics and Astronomy Publications. 579.
https://lib.dr.iastate.edu/physastro_pubs/579
Comments
This article is published as Mun, E., S. L. Bud'ko, Y. Lee, C. Martin, M. A. Tanatar, R. Prozorov, and P. C. Canfield. "Quantum oscillations in the heavy-fermion compound YbPtBi." Physical Review B 92, no. 8 (2015): 085135. DOI: 10.1103/PhysRevB.92.085135. Posted with permission.