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Matching DMFT calculations with photoemission spectra of heavy fermion insulators: universal properties of the near-gap spectra of SmB\(_{6}\)
Zitieren Sie bitte immer diese URN: urn:nbn:de:bvb:20-opus-170328
- Paramagnetic heavy fermion insulators consist of fully occupied quasiparticle bands inherent to Fermi liquid theory. The gap emergence below a characteristic temperature is the ultimate sign of coherence for a many-body system, which in addition can induce a non-trivial band topology. Here, we demonstrate a simple and efficient method to compare a model study and an experimental result for heavy fermion insulators. The temperature dependence of the gap formation in both local moment and mixed valence regimes is captured within the dynamicalParamagnetic heavy fermion insulators consist of fully occupied quasiparticle bands inherent to Fermi liquid theory. The gap emergence below a characteristic temperature is the ultimate sign of coherence for a many-body system, which in addition can induce a non-trivial band topology. Here, we demonstrate a simple and efficient method to compare a model study and an experimental result for heavy fermion insulators. The temperature dependence of the gap formation in both local moment and mixed valence regimes is captured within the dynamical mean field (DMFT) approximation to the periodic Anderson model (PAM). Using the topological coherence temperature as the scaling factor and choosing the input parameter set within the mixed valence regime, we can unambiguously link the theoretical energy scales to the experimental ones. As a particularly important result, we find improved consistency between the scaled DMFT density of states and the photoemission near-gap spectra of samarium hexaboride (SmB\(_{6}\)).…
Autor(en): | Chul-Hee Min, F. Goth, P. Lutz, H. Bentmann, B.Y. Kang, B.K. Cho, J. Werner, K.-S. Chen, F. Assaad, F. Reinert |
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URN: | urn:nbn:de:bvb:20-opus-170328 |
Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
Institute der Universität: | Fakultät für Physik und Astronomie / Physikalisches Institut |
Fakultät für Physik und Astronomie / Institut für Theoretische Physik und Astrophysik | |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | Scientific Reports |
Erscheinungsjahr: | 2017 |
Band / Jahrgang: | 7 |
Heft / Ausgabe: | 11980 |
Originalveröffentlichung / Quelle: | Scientific Reports 2017, 7:11980. DOI: 10.1038/s41598-017-12080-5 |
DOI: | https://doi.org/10.1038/s41598-017-12080-5 |
PubMed-ID: | https://pubmed.ncbi.nlm.nih.gov/28931836 |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Freie Schlagwort(e): | SmB\(_{6}\); dynamical mean field; heavy fermion insulators; near-gap spectra; samarium hexaboride |
Datum der Freischaltung: | 23.09.2019 |
Lizenz (Deutsch): | CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |