Photoinduced renormalization and electronic screening of quasi-two-dimensional Dirac states in BaNiS_{2}
By means of time- and angle-resolved photoelectron spectroscopy, we give evidence of a remarkable reduction of the Fermi velocity of out-of-equilibrium Dirac bands in the quasi-two-dimensional semimetal BaNiS_{2}. This effect is accompanied by a nonrigid shift of the bands at the center of the Brill...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2020-12-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.043397 |
| _version_ | 1797211156466630656 |
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| author | N. Nilforoushan M. Casula M. Caputo E. Papalazarou J. Caillaux Z. Chen L. Perfetti A. Amaricci D. Santos-Cottin Y. Klein A. Gauzzi M. Marsi |
| author_facet | N. Nilforoushan M. Casula M. Caputo E. Papalazarou J. Caillaux Z. Chen L. Perfetti A. Amaricci D. Santos-Cottin Y. Klein A. Gauzzi M. Marsi |
| author_sort | N. Nilforoushan |
| collection | DOAJ |
| description | By means of time- and angle-resolved photoelectron spectroscopy, we give evidence of a remarkable reduction of the Fermi velocity of out-of-equilibrium Dirac bands in the quasi-two-dimensional semimetal BaNiS_{2}. This effect is accompanied by a nonrigid shift of the bands at the center of the Brillouin zone. Analytical and first-principles calculations indicate that this band renormalization is ascribed to a change in nonlocal electron correlations driven by a photoinduced enhancement of screening properties. Our results are explained by a scaling relation between inverse screening length and electronic temperature that is of general relevance for the description of out-of-equilibrium dynamics and screening effects in all layered Dirac materials. |
| first_indexed | 2024-04-24T10:22:01Z |
| format | Article |
| id | doaj.art-c9d8a928c88943169e3897354e59429f |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:22:01Z |
| publishDate | 2020-12-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-c9d8a928c88943169e3897354e59429f2024-04-12T17:05:31ZengAmerican Physical SocietyPhysical Review Research2643-15642020-12-012404339710.1103/PhysRevResearch.2.043397Photoinduced renormalization and electronic screening of quasi-two-dimensional Dirac states in BaNiS_{2}N. NilforoushanM. CasulaM. CaputoE. PapalazarouJ. CaillauxZ. ChenL. PerfettiA. AmaricciD. Santos-CottinY. KleinA. GauzziM. MarsiBy means of time- and angle-resolved photoelectron spectroscopy, we give evidence of a remarkable reduction of the Fermi velocity of out-of-equilibrium Dirac bands in the quasi-two-dimensional semimetal BaNiS_{2}. This effect is accompanied by a nonrigid shift of the bands at the center of the Brillouin zone. Analytical and first-principles calculations indicate that this band renormalization is ascribed to a change in nonlocal electron correlations driven by a photoinduced enhancement of screening properties. Our results are explained by a scaling relation between inverse screening length and electronic temperature that is of general relevance for the description of out-of-equilibrium dynamics and screening effects in all layered Dirac materials.http://doi.org/10.1103/PhysRevResearch.2.043397 |
| spellingShingle | N. Nilforoushan M. Casula M. Caputo E. Papalazarou J. Caillaux Z. Chen L. Perfetti A. Amaricci D. Santos-Cottin Y. Klein A. Gauzzi M. Marsi Photoinduced renormalization and electronic screening of quasi-two-dimensional Dirac states in BaNiS_{2} Physical Review Research |
| title | Photoinduced renormalization and electronic screening of quasi-two-dimensional Dirac states in BaNiS_{2} |
| title_full | Photoinduced renormalization and electronic screening of quasi-two-dimensional Dirac states in BaNiS_{2} |
| title_fullStr | Photoinduced renormalization and electronic screening of quasi-two-dimensional Dirac states in BaNiS_{2} |
| title_full_unstemmed | Photoinduced renormalization and electronic screening of quasi-two-dimensional Dirac states in BaNiS_{2} |
| title_short | Photoinduced renormalization and electronic screening of quasi-two-dimensional Dirac states in BaNiS_{2} |
| title_sort | photoinduced renormalization and electronic screening of quasi two dimensional dirac states in banis 2 |
| url | http://doi.org/10.1103/PhysRevResearch.2.043397 |
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