Enhanced optical conductivity and many-body effects in strongly-driven photo-excited semi-metallic graphite.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
16 Nov 2023
16 Nov 2023
Historique:
received:
16
01
2023
accepted:
02
11
2023
medline:
17
11
2023
pubmed:
17
11
2023
entrez:
17
11
2023
Statut:
epublish
Résumé
The excitation of quasi-particles near the extrema of the electronic band structure is a gateway to electronic phase transitions in condensed matter. In a many-body system, quasi-particle dynamics are strongly influenced by the electronic single-particle structure and have been extensively studied in the weak optical excitation regime. Yet, under strong optical excitation, where light fields coherently drive carriers, the dynamics of many-body interactions that can lead to new quantum phases remain largely unresolved. Here, we induce such a highly non-equilibrium many-body state through strong optical excitation of charge carriers near the van Hove singularity in graphite. We investigate the system's evolution into a strongly-driven photo-excited state with attosecond soft X-ray core-level spectroscopy. We find an enhancement of the optical conductivity of nearly ten times the quantum conductivity and pinpoint it to carrier excitations in flat bands. This interaction regime is robust against carrier-carrier interaction with coherent optical phonons acting as an attractive force reminiscent of superconductivity. The strongly-driven non-equilibrium state is markedly different from the single-particle structure and macroscopic conductivity and is a consequence of the non-adiabatic many-body state.
Identifiants
pubmed: 37973799
doi: 10.1038/s41467-023-43191-5
pii: 10.1038/s41467-023-43191-5
pmc: PMC10654445
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
7407Informations de copyright
© 2023. The Author(s).
Références
Phys Rev Lett. 2015 Jun 19;114(24):247001
pubmed: 26196996
Proc Natl Acad Sci U S A. 2020 Mar 24;117(12):6409-6416
pubmed: 32161128
J Am Chem Soc. 2011 Apr 27;133(16):6318-22
pubmed: 21452870
Phys Rev Lett. 2001 Dec 10;87(24):246405
pubmed: 11736524
J Phys Condens Matter. 2014 Oct 1;26(39):395301
pubmed: 25192336
Phys Rev Lett. 2009 Feb 27;102(8):086809
pubmed: 19257774
Nature. 2016 Feb 25;530(7591):461-4
pubmed: 26855424
Phys Rev Lett. 2020 Oct 23;125(17):176403
pubmed: 33156643
J Phys Condens Matter. 2013 Feb 6;25(5):054202
pubmed: 23441326
Phys Rev Lett. 2008 Mar 21;100(11):117401
pubmed: 18517825
Phys Rev Lett. 2007 May 18;98(20):206802
pubmed: 17677726
Phys Rev Lett. 2014 Jun 27;112(25):257402
pubmed: 25014830
Nature. 2021 Oct;598(7881):429-433
pubmed: 34469943
J Phys Condens Matter. 2013 Feb 6;25(5):054201
pubmed: 23441325
Phys Rev Lett. 2010 Apr 2;104(13):136803
pubmed: 20481902
Opt Express. 2016 Jun 13;24(12):13033-43
pubmed: 27410322
Phys Rev Lett. 2007 Jan 19;98(3):036801
pubmed: 17358708
Nat Commun. 2021 Oct 4;12(1):5803
pubmed: 34608144
Nature. 2007 Sep 6;449(7158):72-4
pubmed: 17805291
Phys Rev Lett. 2001 Dec 24;87(26):267402
pubmed: 11800855
Nature. 2017 Oct 12;550(7675):224-228
pubmed: 28953882
J Res Natl Bur Stand A Phys Chem. 1970 May-Jun;74A(3):417-431
pubmed: 32523195
Phys Rev Lett. 2004 Oct 15;93(16):166402
pubmed: 15525015
ACS Nano. 2020 Jan 28;14(1):1055-1069
pubmed: 31825586
Science. 2022 Feb 18;375(6582):774-778
pubmed: 35025604
Phys Rev Lett. 2009 Feb 20;102(7):076803
pubmed: 19257705
Science. 2019 Aug 9;365(6453):605-608
pubmed: 31346139
Phys Rev Lett. 2008 Jan 25;100(3):037601
pubmed: 18233036