Pomeranchuk instability from electronic correlations in CsTi$_3$Bi$_5$ kagome metal
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2024
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| author | Bigi, Chiara Dürrnagel, Matteo Klebl, Lennart Consiglio, Armando Pokharel, Ganesh Bertran, Francois Févre, Patrick Le Jaouen, Thomas Tchouekem, Hulerich C. Turban, Pascal De Vita, Alessandro Miwa, Jill A. Wells, Justin W. Oh, Dongjin Comin, Riccardo Thomale, Ronny Zeljkovic, Ilija Ortiz, Brenden R. Wilson, Stephen D. Sangiovanni, Giorgio Mazzola, Federico Di Sante, Domenico |
| author_facet | Bigi, Chiara Dürrnagel, Matteo Klebl, Lennart Consiglio, Armando Pokharel, Ganesh Bertran, Francois Févre, Patrick Le Jaouen, Thomas Tchouekem, Hulerich C. Turban, Pascal De Vita, Alessandro Miwa, Jill A. Wells, Justin W. Oh, Dongjin Comin, Riccardo Thomale, Ronny Zeljkovic, Ilija Ortiz, Brenden R. Wilson, Stephen D. Sangiovanni, Giorgio Mazzola, Federico Di Sante, Domenico |
| contents | Among many-body instabilities in correlated quantum systems, electronic nematicity, defined by the spontaneous breaking of rotational symmetry, has emerged as a critical phenomenon, particularly within high-temperature superconductors. Recently, this behavior has been identified in CsTi$_3$Bi$_5$, a member of the AV$_3$Sb$_5$ (A = K, Rb, Cs) kagome family, recognized for its intricate and unconventional quantum phases. Despite accumulating indirect evidence, the fundamental mechanisms driving nematicity in CsTi$_3$Bi$_5$ remain inadequately understood, sparking ongoing debates. In this study, we employ polarization-dependent angle-resolved photoemission spectroscopy to reveal definitive signatures of an orbital-selective nematic deformation in the electronic structure of CsTi$_3$Bi$_5$. This direct experimental evidence underscores the pivotal role of orbital degrees of freedom in symmetry breaking, providing new insights into the complex electronic environment. By applying the functional renormalization group technique to a fully interacting ab initio model, we demonstrate the emergence of a finite angular momentum ($d$-wave) Pomeranchuk instability in CsTi$_3$Bi$_5$, driven by the concomitant action of electronic correlations within specific orbital channels and chemical potential detuning away from Van Hove singularities. By elucidating the connection between orbital correlations and symmetry-breaking instabilities, this work lays a crucial foundation for future investigations into the broader role of orbital selectivity in quantum materials, with far-reaching implications for the design and manipulation of novel electronic phases. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_22929 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Pomeranchuk instability from electronic correlations in CsTi$_3$Bi$_5$ kagome metal Bigi, Chiara Dürrnagel, Matteo Klebl, Lennart Consiglio, Armando Pokharel, Ganesh Bertran, Francois Févre, Patrick Le Jaouen, Thomas Tchouekem, Hulerich C. Turban, Pascal De Vita, Alessandro Miwa, Jill A. Wells, Justin W. Oh, Dongjin Comin, Riccardo Thomale, Ronny Zeljkovic, Ilija Ortiz, Brenden R. Wilson, Stephen D. Sangiovanni, Giorgio Mazzola, Federico Di Sante, Domenico Strongly Correlated Electrons Materials Science Among many-body instabilities in correlated quantum systems, electronic nematicity, defined by the spontaneous breaking of rotational symmetry, has emerged as a critical phenomenon, particularly within high-temperature superconductors. Recently, this behavior has been identified in CsTi$_3$Bi$_5$, a member of the AV$_3$Sb$_5$ (A = K, Rb, Cs) kagome family, recognized for its intricate and unconventional quantum phases. Despite accumulating indirect evidence, the fundamental mechanisms driving nematicity in CsTi$_3$Bi$_5$ remain inadequately understood, sparking ongoing debates. In this study, we employ polarization-dependent angle-resolved photoemission spectroscopy to reveal definitive signatures of an orbital-selective nematic deformation in the electronic structure of CsTi$_3$Bi$_5$. This direct experimental evidence underscores the pivotal role of orbital degrees of freedom in symmetry breaking, providing new insights into the complex electronic environment. By applying the functional renormalization group technique to a fully interacting ab initio model, we demonstrate the emergence of a finite angular momentum ($d$-wave) Pomeranchuk instability in CsTi$_3$Bi$_5$, driven by the concomitant action of electronic correlations within specific orbital channels and chemical potential detuning away from Van Hove singularities. By elucidating the connection between orbital correlations and symmetry-breaking instabilities, this work lays a crucial foundation for future investigations into the broader role of orbital selectivity in quantum materials, with far-reaching implications for the design and manipulation of novel electronic phases. |
| title | Pomeranchuk instability from electronic correlations in CsTi$_3$Bi$_5$ kagome metal |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2410.22929 |