Universität zu Köln

Willers, Thomas, Strigari, Fabio, Hu, Zhiwei ORCID: 0000-0003-0324-2227, Sessi, Violetta, Brookes, Nicholas B., Bauer, Eric D., Sarrao, John L., Thompson, J. D., Tanaka, Arata ORCID: 0000-0001-8301-8502, Wirth, Steffen, Tjeng, Liu Hao ORCID: 0000-0002-0595-9312 and Severing, Andrea ORCID: 0000-0002-9547-2742 (2015). Correlation between ground state and orbital anisotropy in heavy fermion materials. Proc. Natl. Acad. Sci. U. S. A., 112 (8). S. 2384 - 2389. WASHINGTON: NATL ACAD SCIENCES. ISSN 0027-8424

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Abstract

The interplay of structural, orbital, charge, and spin degrees of freedom is at the heart of many emergent phenomena, including superconductivity. 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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Willers, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Strigari, Fabio UNSPECIFIED UNSPECIFIED UNSPECIFIED Hu, Zhiwei UNSPECIFIED orcid.org/0000-0003-0324-2227 UNSPECIFIED Sessi, Violetta UNSPECIFIED UNSPECIFIED UNSPECIFIED Brookes, Nicholas B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bauer, Eric D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sarrao, John L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Thompson, J. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tanaka, Arata UNSPECIFIED orcid.org/0000-0001-8301-8502 UNSPECIFIED Wirth, Steffen UNSPECIFIED UNSPECIFIED UNSPECIFIED Tjeng, Liu Hao UNSPECIFIED orcid.org/0000-0002-0595-9312 UNSPECIFIED Severing, Andrea UNSPECIFIED orcid.org/0000-0002-9547-2742 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-407245
DOI:	10.1073/pnas.1415657112
Journal or Publication Title:	Proc. Natl. Acad. Sci. U. S. A.
Volume:	112
Number:	8
Page Range:	S. 2384 - 2389
Date:	2015
Publisher:	NATL ACAD SCIENCES
Place of Publication:	WASHINGTON
ISSN:	0027-8424
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SUPERCONDUCTOR CEIRIN5; TRANSITION; PRESSURE; CERHIN5; CECOIN5 Multiple languages Multidisciplinary Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/40724