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Title: de Haas–van Alphen study of role of 4 f electrons in antiferromagnetic CeZn 11 as compared to its nonmagnetic analog LaZn 11

Abstract

Here we present a de Haas–van Alphen study of the Fermi surface of the low-temperature antiferromagnet CeZn 11 and its nonmagnetic analog LaZn 11, measured by torque magnetometry up to fields of 33T and at temperatures down to 320 mK . Both systems possess similar de Haas–van Alphen frequencies, with three clear sets of features—ranging from 50 T to 4 kT —corresponding to three bands of a complex Fermi surface, with an expected fourth band also seen weakly in CeZn 11 . The effective masses of the charge carriers are very light (<1 m e) in LaZn 11 but a factor of 2–4 larger in CeZn 11, indicative of stronger electronic correlations. We perform detailed density functional theory (DFT) calculations for CeZn 11 and find that only DFT+ U calculations with U = 1.5 eV , which localize the 4 f states, provide a good match to the measured de Haas–van Alphen frequencies, once the presence of magnetic breakdown orbits is also considered. Finally, our study suggests that the Fermi surface of CeZn 11 is very close to that of LaZn 11 being dominated by Zn 3d , as the Ce 4 f states are localized and have little influencemore » on its electronic structure, however, they are responsible for its magnetic order and contribute to enhance electronic correlations.« less

Authors:
 [1];  [2];  [3];  [2];  [2];  [1]
  1. Univ. of Oxford (United Kingdom). Clarendon Lab., Dept. of Physics
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
  3. Radboud Univ., Nijmegen (Netherlands). High Field Magnet Laboratory (HFML-EMFL)
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1342926
Alternate Identifier(s):
OSTI ID: 1334227
Report Number(s):
IS-J-9174
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1701182
Grant/Contract Number:  
EP/L001772/1; EP/I017836/1; EP/N01085X/1; EP/I004475/1; AC02-07CH11358
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 23; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Blake, S. F., Hodovanets, H., McCollam, A., Bud'ko, S. L., Canfield, P. 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. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.235103.
Blake, S. F., Hodovanets, H., McCollam, A., Bud'ko, S. L., Canfield, P. C., & Coldea, A. I. de Haas–van Alphen study of role of 4f electrons in antiferromagnetic CeZn11 as compared to its nonmagnetic analog LaZn11. United States. https://doi.org/10.1103/PhysRevB.94.235103
Blake, S. F., Hodovanets, H., McCollam, A., Bud'ko, S. L., Canfield, P. C., and Coldea, A. I. Fri . "de Haas–van Alphen study of role of 4f electrons in antiferromagnetic CeZn11 as compared to its nonmagnetic analog LaZn11". United States. https://doi.org/10.1103/PhysRevB.94.235103. https://www.osti.gov/servlets/purl/1342926.
@article{osti_1342926,
title = {de Haas–van Alphen study of role of 4f electrons in antiferromagnetic CeZn11 as compared to its nonmagnetic analog LaZn11},
author = {Blake, S. F. and Hodovanets, H. and McCollam, A. and Bud'ko, S. L. and Canfield, P. C. and Coldea, A. I.},
abstractNote = {Here 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 320 mK . Both systems possess similar de Haas–van Alphen frequencies, with three clear sets of features—ranging from 50 T to 4 kT —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 (<1 me) 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 = 1.5 eV , which localize the 4 f states, provide a good match to the measured de Haas–van Alphen frequencies, once the presence of magnetic breakdown orbits is also considered. Finally, our study suggests that the Fermi surface of CeZn11 is very close to that of LaZn11 being dominated by Zn 3d , as the Ce 4 f 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.},
doi = {10.1103/PhysRevB.94.235103},
url = {https://www.osti.gov/biblio/1342926}, journal = {Physical Review B},
issn = {2469-9950},
number = 23,
volume = 94,
place = {United States},
year = {2016},
month = {12}
}

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