Universität zu Köln

Amorese, Andrea ORCID: 0000-0003-0271-0543, Stockert, Oliver, Kummer, Kurt, Brookes, Nicholas B., Kim, Dae-Jeong, Fisk, Zachary, Haverkort, Maurits W., Thalmeier, Peter, Tjeng, Liu Hao ORCID: 0000-0002-0595-9312 and Severing, Andrea ORCID: 0000-0002-9547-2742 (2019). Resonant inelastic x-ray scattering investigation of the crystal-field splitting of Sm3+ in SmB6. Phys. Rev. B, 100 (24). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

Full text not available from this repository.

Abstract

The crystal-field (CF) splitting of the H-6(5/2) Hund's rule ground state of Sm3+ in the strongly correlated topological insulator SmB6 has been determined with high-resolution resonant inelastic x-ray scattering (RIXS) at the Sm M-5 edge. The valence selectivity of RIXS allows isolating the crystal-field-split excited multiplets of the Sm3+ (4f(5)) configuration from those of Sm2+ (4f(6)) in intermediate valent SmB6. We find that the quartet Gamma(8) ground state and the doublet Gamma(7) excited state are split by Delta(CF)(6H5/2) = 20 +/- 10 meV which sets an upper limit H for the 4f bandwidth. This indicates an extremely large mass renormalization from the band-structure value, pointing out the need to consider the coefficients of fractional parentage for the hopping of the 4f electrons. The tiny bandwidth explains the small value of the indirect gap and puts constraints on the energies of the topological surface states.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Amorese, Andrea UNSPECIFIED orcid.org/0000-0003-0271-0543 UNSPECIFIED Stockert, Oliver UNSPECIFIED UNSPECIFIED UNSPECIFIED Kummer, Kurt UNSPECIFIED UNSPECIFIED UNSPECIFIED Brookes, Nicholas B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Dae-Jeong UNSPECIFIED UNSPECIFIED UNSPECIFIED Fisk, Zachary UNSPECIFIED UNSPECIFIED UNSPECIFIED Haverkort, Maurits W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Thalmeier, Peter 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:38-124452
DOI:	10.1103/PhysRevB.100.241107
Journal or Publication Title:	Phys. Rev. B
Volume:	100
Number:	24
Date:	2019
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
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 NEUTRON-SCATTERING; MIXED-VALENCE; SURFACE; STATE Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/12445