Campus Units
Physics and Astronomy, Ames Laboratory
Document Type
Article
Publication Version
Published Version
Publication Date
12-15-2016
Journal or Book Title
Physical Review B
Volume
94
Issue
23
First Page
235103
DOI
10.1103/PhysRevB.94.235103
Abstract
We present a de Haas–van Alphen study of the Fermi surface of the low-temperature antiferromagnet CeZn11 and its nonmagnetic analog LaZn11, measured by torque magnetometry up to fields of 33T and at temperatures down to 320mK. Both systems possess similar de Haas–van Alphen frequencies, with three clear sets of features—ranging from 50T to 4kT—corresponding to three bands of a complex Fermi surface, with an expected fourth band also seen weakly in CeZn11. The effective masses of the charge carriers are very light (<1me) in LaZn11 but a factor of 2–4 larger in CeZn11, indicative of stronger electronic correlations. We perform detailed density functional theory (DFT) calculations for CeZn11 and find that only DFT+U calculations with U=1.5eV, which localize the 4f states, provide a good match to the measured de Haas–van Alphen frequencies, once the presence of magnetic breakdown orbits is also considered. Our study suggests that the Fermi surface of CeZn11 is very close to that of LaZn11 being dominated by Zn 3d, as the Ce 4f states are localized and have little influence on its electronic structure, however, they are responsible for its magnetic order and contribute to enhance electronic correlations.
Copyright Owner
American Physical Society
Copyright Date
2016
Language
en
File Format
application/pdf
Recommended Citation
Blake, S. F.; Hodovanets, H.; McCollam, A.; Bud’ko, Sergey L.; Canfield, Paul C.; and Coldea, A. I., "de Haas–van Alphen study of role of 4f electrons in antiferromagnetic CeZn11 as compared to its nonmagnetic analog LaZn11" (2016). Physics and Astronomy Publications. 549.
https://lib.dr.iastate.edu/physastro_pubs/549
Comments
This article is published as Blake, S. F., H. Hodovanets, A. McCollam, S. L. Bud'ko, P. C. Canfield, and A. I. Coldea. "de Haas–van Alphen study of role of 4 f electrons in antiferromagnetic CeZn 11 as compared to its nonmagnetic analog LaZn 11." Physical Review B 94, no. 23 (2016): 235103. DOI: 10.1103/PhysRevB.94.235103. Posted with permission.