Orbitally defined field-induced electronic state in a Kondo lattice

Lessux, G. G.*; Sakai, Hironori ; Hattori, Taisuke*; Tokunaga, Yo ; Kambe, Shinsaku ; Kuhns, P. L.*; Reyes, A. P.*; Thompson, J. D.*; Pagliuso, P. G.*; Urbano, R. R.*

CeRhIn is a Kondo-lattice prototype in which a magnetic field $B^{ast}$ 31T induces an abrupt Fermi-surface (FS) reconstruction and pronounced in-plane electrical transport anisotropy all within its antiferromagnetic state. Here we report low-temperature nuclear magnetic resonance (NMR) measurements revealing a pronounced decrease in the $^{115}$ In formal Knight shift, without changes in crystal or magnetic structures, of CeRhIn at fields () spanning $B^{ast}$ . We discuss the emergent state above $B^{ast}$ in terms of a change in Ce's 4 orbitals that arises from field-induced evolution of crystal-electric field (CEF) energy levels. This change in orbital character enhances hybridization between the 4 and the conduction electrons that leads ultimately to an itinerant quantum-critical point at $B_{c0}$ 50T.

Language	:	English
Journal	:	Physical Review B
Volume	:	101
Number	:	16
Pages	:	p.165111_1 - 165111_6
Publication Year/Month	:	2020/04
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Paper URL	:	https://doi.org/10.1103/PhysRevB.101.165111
DOI for research data	:	https://doi.org/10.1103/PhysRevB.101.165111
Keywords	:	強磁場; NMR; CeRhIn
Research Facility	:	第4研究棟
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Article of JAEA R&D Review	:
Cooperating Institute	:	Los Alamos National Laboratory; Universidade Estadual de Campinas; NHMFL-FSU

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Web of Science® Times Cited Count	:	Times Cited Count： If you would like to get the latest times cited, please access the Web of Science®. http://www.webofknowledge.com/wos
InCites™	:	Percentile:44.34 Category:Materials Science, Multidisciplinary
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Registration No. : AA20220612
JAEA Abstracts No. : 51000162
Paper Submission No. : 26143

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