Aeschlimann, Sven 
; Sato, Shunsuke A. ; Krause, Razvan ; Chávez-Cervantes, Mariana ; De Giovannini, Umberto ; Hübener, Hannes ; Forti, Stiven ; Coletti, Camilla ; Hanff, Kerstin ; Rossnagel, Kai ; Rubio, Angel ; Gierz, Isabella
Alternative Links zum Volltext:DOIVerlag
| Dokumentenart: | Artikel |
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| Titel eines Journals oder einer Zeitschrift: | Nano Letters |
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| Verlag: | AMER CHEMICAL SOC |
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| Ort der Veröffentlichung: | WASHINGTON |
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| Band: | 21 |
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| Nummer des Zeitschriftenheftes oder des Kapitels: | 12 |
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| Seitenbereich: | S. 5028-5035 |
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| Datum: | 2021 |
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| Institutionen: | Physik > Institut für Experimentelle und Angewandte Physik |
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| Identifikationsnummer: | | Wert | Typ |
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| 10.1021/acs.nanolett.1c00801 | DOI |
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| Stichwörter / Keywords: | Floquet-Bloch states; dissipation; time- and angle-resolved photoemission spectroscopy; time-dependent density functional theory; driven two-level system with dissipation |
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| Dewey-Dezimal-Klassifikation: | 500 Naturwissenschaften und Mathematik > 530 Physik |
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| Status: | Veröffentlicht |
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| Begutachtet: | Ja, diese Version wurde begutachtet |
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| An der Universität Regensburg entstanden: | Ja |
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| Dokumenten-ID: | 56229 |
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Web of Science
Zusammenfassung
Floquet theory has spawned many exciting possibilities for electronic structure control with light, with enormous potential for future applications. The experimental demonstration in solids, however, remains largely unrealized. In particular, the influence of scattering on the formation of Floquet- Bloch states remains poorly understood. Here we combine time-and angle-resolved photoemission ...
Zusammenfassung
Floquet theory has spawned many exciting possibilities for electronic structure control with light, with enormous potential for future applications. The experimental demonstration in solids, however, remains largely unrealized. In particular, the influence of scattering on the formation of Floquet- Bloch states remains poorly understood. Here we combine time-and angle-resolved photoemission spectroscopy with time-dependent density functional theory and a two-level model with relaxation to investigate the survival of Floquet-Bloch states in the presence of scattering. We find that Floquet-Bloch states will be destroyed if scattering-activated by electronic excitations-prevents the Bloch electrons from following the driving field coherently. The two-level model also shows that Floquet-Bloch states reappear at high field intensities where energy exchange with the driving field dominates over energy dissipation to the bath. Our results clearly indicate the importance of long scattering times combined with strong driving fields for the successful realization of various Floquet phenomena.
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