| Full text | |
| Author(s): |
Lesseux, G. G.
;
Sakai, H.
;
Hattori, T.
;
Tokunaga, Y.
;
Kambe, S.
;
Kuhns, P. L.
;
Reyes, A. P.
;
Thompson, J. D.
;
Pagliuso, P. G.
;
Urbano, R. R.
Total Authors: 10
|
| Document type: | Journal article |
| Source: | PHYSICAL REVIEW B; v. 101, n. 16, p. 6-pg., 2020-04-10. |
| Abstract | |
CeRhIn5 is a Kondo-lattice prototype in which a magnetic field B* similar or equal to 31 T induces an abrupt Fermi-surface (FS) reconstruction and pronounced in-plane electrical transport anisotropy all within its antiferromagnetic state. Though the antiferromagnetic order at zero field is well understood, the origin of an emergent state at B* remains unknown due to challenges inherent to probing states microscopically at high fields. Here we report low-temperature nuclear magnetic resonance (NMR) measurements revealing a pronounced decrease in the In-115 formal Knight shift, without changes in crystal or magnetic structures, of CeRhIn5 at fields (parallel to c) spanning B*. We discuss the emergent state above B* in terms of a change in Ce's 4f orbitals that arises from field-induced evolution of crystal-electric field (CEF) energy levels. This change in orbital character enhances hybridization between the 4f and the conduction electrons that leads ultimately to an itinerant quantum-critical point at B-c0 similar or equal to 50 T. (AU) | |
| FAPESP's process: | 12/05903-6 - Nuclear magnetic resonance of novel complex and advanced materials in condensed matter physics |
| Grantee: | Ricardo Rodrigues Urbano |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 17/10581-1 - Emergent phenomena in reduced dimension systems |
| Grantee: | Pascoal Jose Giglio Pagliuso |
| Support Opportunities: | Special Projects |
| FAPESP's process: | 12/04870-7 - Studies of novel complex and advanced materials |
| Grantee: | Pascoal Jose Giglio Pagliuso |
| Support Opportunities: | Research Projects - Thematic Grants |