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| Format: | Preprint |
| Veröffentlicht: |
2025
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| Online-Zugang: | https://arxiv.org/abs/2502.19589 |
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| _version_ | 1866910847438159872 |
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| author | Mazzola, Federico Brzezicki, Wojciech Bigi, Chiara Consiglio, Armando Onofrio, Luciano Jacopo D' Mercaldo, Maria Teresa Kłosiński, Adam Bertran, François Fèvre, Patrick Le Clark, Oliver J. Edmonds, Mark T. Tuniz, Manuel De Vita, Alessandro Polewczyk, Vincent Jacobsen, Jeppe B. Jacobsen, Henrik Miwa, Jill A. Wells, Justin W. Jana, Anupam Vobornik, Ivana Fujii, Jun Mignani, Niccolò Tarakameh, Narges Samani Crepaldi, Alberto Sangiovanni, Giorgio Kataria, Anshu Morresi, Tommaso Sanna, Samuele Bonfá, Pietro Ortiz, Brenden R. Pokharel, Ganesh Wilson, Stephen D. Di Sante, Domenico Ortix, Carmine Cuoco, Mario |
| author_facet | Mazzola, Federico Brzezicki, Wojciech Bigi, Chiara Consiglio, Armando Onofrio, Luciano Jacopo D' Mercaldo, Maria Teresa Kłosiński, Adam Bertran, François Fèvre, Patrick Le Clark, Oliver J. Edmonds, Mark T. Tuniz, Manuel De Vita, Alessandro Polewczyk, Vincent Jacobsen, Jeppe B. Jacobsen, Henrik Miwa, Jill A. Wells, Justin W. Jana, Anupam Vobornik, Ivana Fujii, Jun Mignani, Niccolò Tarakameh, Narges Samani Crepaldi, Alberto Sangiovanni, Giorgio Kataria, Anshu Morresi, Tommaso Sanna, Samuele Bonfá, Pietro Ortiz, Brenden R. Pokharel, Ganesh Wilson, Stephen D. Di Sante, Domenico Ortix, Carmine Cuoco, Mario |
| contents | The kagome lattice stands as a rich platform for hosting a wide array of correlated quantum phenomena, ranging from charge density waves and superconductivity to electron nematicity and loop current states. Direct detection of loop currents in kagome systems has remained a formidable challenge due to their intricate spatial arrangements and the weak magnetic field signatures they produce. This has left their existence and underlying mechanisms a topic of intense debate. In this work, we uncover a hallmark reconcilable with loop currents: spin handedness-selective signals that surpass conventional dichroic, spin, and spin-dichroic responses. We observe this phenomenon in the kagome metal CsTi$_3$Bi$_5$ and we call it the anomalous spin-optical helical effect. This effect arises from the coupling of light' s helicity with spin-orbital electron correlations, providing a groundbreaking method to visualize loop currents in quantum materials. Our discovery not only enriches the debate surrounding loop currents but also paves the way for new strategies to exploit the electronic phases of quantum materials via light-matter interaction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_19589 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Anomalous spin-optical helical effect in Ti-based kagome metal Mazzola, Federico Brzezicki, Wojciech Bigi, Chiara Consiglio, Armando Onofrio, Luciano Jacopo D' Mercaldo, Maria Teresa Kłosiński, Adam Bertran, François Fèvre, Patrick Le Clark, Oliver J. Edmonds, Mark T. Tuniz, Manuel De Vita, Alessandro Polewczyk, Vincent Jacobsen, Jeppe B. Jacobsen, Henrik Miwa, Jill A. Wells, Justin W. Jana, Anupam Vobornik, Ivana Fujii, Jun Mignani, Niccolò Tarakameh, Narges Samani Crepaldi, Alberto Sangiovanni, Giorgio Kataria, Anshu Morresi, Tommaso Sanna, Samuele Bonfá, Pietro Ortiz, Brenden R. Pokharel, Ganesh Wilson, Stephen D. Di Sante, Domenico Ortix, Carmine Cuoco, Mario Strongly Correlated Electrons The kagome lattice stands as a rich platform for hosting a wide array of correlated quantum phenomena, ranging from charge density waves and superconductivity to electron nematicity and loop current states. Direct detection of loop currents in kagome systems has remained a formidable challenge due to their intricate spatial arrangements and the weak magnetic field signatures they produce. This has left their existence and underlying mechanisms a topic of intense debate. In this work, we uncover a hallmark reconcilable with loop currents: spin handedness-selective signals that surpass conventional dichroic, spin, and spin-dichroic responses. We observe this phenomenon in the kagome metal CsTi$_3$Bi$_5$ and we call it the anomalous spin-optical helical effect. This effect arises from the coupling of light' s helicity with spin-orbital electron correlations, providing a groundbreaking method to visualize loop currents in quantum materials. Our discovery not only enriches the debate surrounding loop currents but also paves the way for new strategies to exploit the electronic phases of quantum materials via light-matter interaction. |
| title | Anomalous spin-optical helical effect in Ti-based kagome metal |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2502.19589 |