Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

9-15-2012

Journal or Book Title

Physical Review B

Volume

86

Issue

11

First Page

115110

DOI

10.1103/PhysRevB.86.115110

Abstract

The thermoelectric power, S(T), of the heavy fermions YbT2Zn20 (T = Fe, Ru, Os, Ir, Rh, and Co) has been measured to shed further light on their strong electronic correlations. A large, negative, local minimum in S(T) with approximately −70 μV/K is found for all compounds. From the observed local minimum, the energy scales associated with both the Kondo temperature and the crystalline electric field splitting are deduced and compared to previous specific heat measurements. At low temperatures, a highly enhanced S(T)/T value is observed for all members, although S(T) does show a deviation from a purely linear temperature dependence, S(T) = αT, for T ≠ Fe members. In the zero-temperature limit, estimated by a simple linear extrapolation, the enhanced S(T)/T value strongly correlates with the electronic specific heat coefficient, C(T)/T.

Comments

This article is published as Mun, E. D., S. Jia, S. L. Bud'Ko, and P. C. Canfield. "Thermoelectric power of the Yb T 2 Zn 20 (T= Fe, Ru, Os, Ir, Rh, and Co) heavy fermions." Physical Review B 86, no. 11 (2012): 115110. DOI: 10.1103/PhysRevB.86.115110. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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