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.

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.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

Share

COinS