Doping-tunable charge ordering in semiconducting single-layer Cr₂Se₃.

ABSTRACT: The charge density wave (CDW), a charge ordering phase, offers a valuable framework for exploring electron-electron interactions, electron-phonon coupling, and quantum phase transitions. In CDW materials, carrier density substantially influences the ground state, typically altered through foreign ion doping and investigated at macro- or mesoscopic scales via photoemission or transport techniques. However, atomic-scale visualization, particularly in doped CDW systems without foreign ions, remains rare. Here, we present real-space observation of doping-tunable granular charge ordering using scanning tunneling microscopy (STM) in semiconducting single-layer Cr₂Se₃, a group VIB transition metal chalcogenide (TMC). Observations of lattice distortion, bandgap modulation at

SUBMITTER: Duan S 

PROVIDER: S-EPMC12407063 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature