Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT
Zur Ablage hinzufügen
  Lokale TagsFreigabegeschichteDetailsÜbersicht

Freigegeben
Zeitschriftenartikel

Mott versus Hybridization Gap in the Low-Temperature Phase of 1T−TaS2

MPG-Autoren
/persons/resource/persons61173

Nicholson,  Christopher W.
Physical Chemistry, Fritz Haber Institute, Max Planck Society;
Department of Physics, University of Fribourg;

Externe Ressourcen
Es sind keine externen Ressourcen hinterlegt
Volltexte (beschränkter Zugriff)
Für Ihren IP-Bereich sind aktuell keine Volltexte freigegeben.
Volltexte (frei zugänglich)

PhysRevLett.129.016402.pdf
(Verlagsversion), 971KB

Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Petocchi, F., Nicholson, C. W., Salzmann, B., Pasquier, D., Yazyev, O. V., Monney, C., et al. (2022). Mott versus Hybridization Gap in the Low-Temperature Phase of 1T−TaS2. Physical Review Letters, 129(1): 016402. doi:10.1103/PhysRevLett.129.016402.


Zitierlink: https://hdl.handle.net/21.11116/0000-000A-C250-0
Zusammenfassung
We address the long-standing problem of the ground state of 1T−TaS2 by computing the correlated electronic structure of stacked bilayers using the GW+EDMFT method. Depending on the surface termination, the semi-infinite uncorrelated system is either band insulating or exhibits a metallic surface state. For realistic values of the on-site and inter-site interactions, a Mott gap opens in the surface state, but it is smaller than the gap originating from the bilayer structure. Our results are consistent with recent scanning tunneling spectroscopy measurements for different terminating layers, and with our own photoemission measurements, which indicate the coexistence of spatial regions with different gaps in the electronic spectrum. By comparison to exact diagonalization data, we clarify the interplay between Mott insulating and band insulating behavior in this archetypal layered system.