Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Zeitschriftenartikel

Gap collapse and flat band induced by uniaxial strain in 1T−TaS2

MPG-Autoren
/persons/resource/persons61173

Nicholson,  Christopher W.
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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

PhysRevB.109.035167.pdf
(Verlagsversion), 3MB

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

Nicholson, C. W., Petocchi, F., Salzmann, B., Witteveen, C., Rumo, M., Kremer, G., et al. (2024). Gap collapse and flat band induced by uniaxial strain in 1T−TaS2. Physical Review B, 109(3): 035167. doi:10.1103/PhysRevB.109.035167.


Zitierlink: https://hdl.handle.net/21.11116/0000-000E-7ECE-E
Zusammenfassung
Interlayer coupling is strongly implicated in the complex electronic properties of 1T-TaS2. Uniaxial strain engineering offers a route to modify this coupling in order to elucidate its interplay with the electronic structure and electronic correlations. Here, we employ angle-resolved photoemission spectroscopy (ARPES) to reveal the effect of uniaxial strain on the electronic structure in 1T-TaS2. The gap of the normally insulating ground state is significantly reduced, with a correlated flat band appearing close to the Fermi level. Temperature-dependent ARPES measurements reveal that the flat band only develops below the commensurate charge density wave (CCDW) transition, where interlayer dimerization produces a band insulator in unstrained samples. Electronic structure calculations suggest that the correlated flat band is stabilized by a modified interlayer coupling of the Ta dz2 electrons. Further hints of a strain-induced structural modification of the interlayer order are obtained from x-ray diffraction. Our combined approach provides critical input for understanding the complex phase diagram of this platform material for correlated physics.