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Title: Correlation between ground state and orbital anisotropy in heavy fermion materials

Abstract

The interplay of structural, orbital, charge, and spin degrees of freedom is at the heart of many emergent phenomena, including superconductivity. We find that unraveling the underlying forces of such novel phases is a great challenge because it not only requires understanding each of these degrees of freedom, it also involves accounting for the interplay between them. Cerium-based heavy fermion compounds are an ideal playground for investigating these interdependencies, and we present evidence for a correlation between orbital anisotropy and the ground states in a representative family of materials. We have measured the 4f crystal-electric field ground-state wave functions of the strongly correlated materials CeRh1₋xIrxIn5 with great accuracy using linear polarization-dependent soft X-ray absorption spectroscopy. These measurements show that these wave functions correlate with the ground-state properties of the substitution series, which covers long-range antiferromagnetic order, unconventional superconductivity, and coexistence of these two states.

Authors:
 [1];  [1];  [2];  [3];  [3];  [4];  [4];  [4];  [5];  [2];  [2];  [1]
  1. Univ. of Cologne (Germany). Inst. of Physics II
  2. Max Planck Inst. for Chemical Physics of Solids, Dresden (Germany)
  3. European Synchrotron Radiation Facility (ESRF), Grenoble (France)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. Hiroshima Univ., Higashi-Hiroshima (Japan). Dept. of Quantum Matter
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); German Research Foundation (DFG)
OSTI Identifier:
1263517
Grant/Contract Number:  
583872
Resource Type:
Accepted Manuscript
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 112; Journal Issue: 8; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; heavy fermions; crystal fields; X-ray absorption; rare earth

Citation Formats

Willers, Thomas, Strigari, Fabio, Hu, Zhiwei, Sessi, Violetta, Brookes, Nicholas B., Bauer, Eric D., Sarrao, John L., Thompson, J. D., Tanaka, Arata, Wirth, Steffen, Tjeng, Liu Hao, and Severing, Andrea. Correlation between ground state and orbital anisotropy in heavy fermion materials. United States: N. p., 2015. Web. doi:10.1073/pnas.1415657112.
Willers, Thomas, Strigari, Fabio, Hu, Zhiwei, Sessi, Violetta, Brookes, Nicholas B., Bauer, Eric D., Sarrao, John L., Thompson, J. D., Tanaka, Arata, Wirth, Steffen, Tjeng, Liu Hao, & Severing, Andrea. Correlation between ground state and orbital anisotropy in heavy fermion materials. United States. https://doi.org/10.1073/pnas.1415657112
Willers, Thomas, Strigari, Fabio, Hu, Zhiwei, Sessi, Violetta, Brookes, Nicholas B., Bauer, Eric D., Sarrao, John L., Thompson, J. D., Tanaka, Arata, Wirth, Steffen, Tjeng, Liu Hao, and Severing, Andrea. Mon . "Correlation between ground state and orbital anisotropy in heavy fermion materials". United States. https://doi.org/10.1073/pnas.1415657112. https://www.osti.gov/servlets/purl/1263517.
@article{osti_1263517,
title = {Correlation between ground state and orbital anisotropy in heavy fermion materials},
author = {Willers, Thomas and Strigari, Fabio and Hu, Zhiwei and Sessi, Violetta and Brookes, Nicholas B. and Bauer, Eric D. and Sarrao, John L. and Thompson, J. D. and Tanaka, Arata and Wirth, Steffen and Tjeng, Liu Hao and Severing, Andrea},
abstractNote = {The interplay of structural, orbital, charge, and spin degrees of freedom is at the heart of many emergent phenomena, including superconductivity. We find that unraveling the underlying forces of such novel phases is a great challenge because it not only requires understanding each of these degrees of freedom, it also involves accounting for the interplay between them. Cerium-based heavy fermion compounds are an ideal playground for investigating these interdependencies, and we present evidence for a correlation between orbital anisotropy and the ground states in a representative family of materials. We have measured the 4f crystal-electric field ground-state wave functions of the strongly correlated materials CeRh1₋xIrxIn5 with great accuracy using linear polarization-dependent soft X-ray absorption spectroscopy. These measurements show that these wave functions correlate with the ground-state properties of the substitution series, which covers long-range antiferromagnetic order, unconventional superconductivity, and coexistence of these two states.},
doi = {10.1073/pnas.1415657112},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 8,
volume = 112,
place = {United States},
year = {Mon Feb 09 00:00:00 EST 2015},
month = {Mon Feb 09 00:00:00 EST 2015}
}

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Spin rotation induced by applied pressure in the Cd-doped Ce 2 RhIn 8 intermetallic compound
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Unconventional and conventional quantum criticalities in CeRh$_{0.58}$Ir$_{0.42}$In$_5$
text, January 2016


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Tunable Emergent Heterostructures in a Prototypical Correlated Metal
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High-field ultrasonic study of quadrupole ordering and crystal symmetry breaking in CeRhIn5
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The quartet ground state in CeB$_6$: an inelastic x-ray scattering study
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