Appearance of a Domain Structure and its Electronic states in Iron Doped 1$T$-TaS${}_2$ Observed using Scanning Tunneling Microscopy and Spectroscopy

Abstract

In this paper, we report on scanning tunneling microscopy and spectroscopy (STM/STS) measurements on iron doped 1$T$-Ta${}_{1-x}$Fe${}_x$S${}_2$. A novel domain structure composed of the domains with localized nature divided by the walls is observed in Ta${}_{0.99}$Fe${}_{0.01}$S${}_2$, where the Mott transition is completely suppressed. This indicates that the melting of the Mott state accompanies the appearance of the domain structure. Since the number of walls increase in superconducting Ta${}_{0.98}$Fe${}_{0.02}$S${}_2$, the domain walls seem to be responsible for superconductivity in iron doped 1$T$-TaS${}_2$.

References in corpus (8)

• Ultrafast switching to a stable hidden topologically protected quantum state in an electronic crystal
• A metallic mosaic phase and the origin of Mott insulating state in 1T-TaS2
• Nanoscale manipulation of the Mott insulating state coupled to charge order in 1T-TaS2
• Influence of domain walls in the incommensurate charge density wave state of Cu intercalated 1$T$-TiSe${}_2$
• Observation of a Charge Density Wave Incommensuration Near the Superconducting Dome in CuxTiSe2
• Fe-doping induced superconductivity in charge-density-wave system 1T-TaS2
• Emergent Novel Metallic State in a Disordered 2D Mott Insulator
• Visualizing the Pt doping effect on surface and electronic structure in Ir_{1-x}Pt_{x}Te_{2} by scanning tunneling microscopy and spectroscopy

Cited by in corpus (3)

• Possible strain induced Mott gap collapse in 1T-TaS${}_2$
• Chiral charge density waves induced by Ti-doping in 1T-TaS2
• Configurational Electronic States in Layered Metallic Dichalcogenides