Correlated electrons of the flat band in charge density wave state of 4Hb-TaSexS2-x

• DOI: 10.48550/arxiv.2406.06104
• Publication Date: 2024-06-10
• Authors: Yanyan Geng; Jianfeng Guo; Fanyu Meng; Manyu Wang; Shuo Mi; Li Huang; Rui Xu; Fei Pang; Kai Liu; Shancai Wang; Hongjun Gao; Weichang Zhou; Wei Ji; Hechang Lei; Zhihai Cheng
• Keywords: Charge Density Wave; Charge density

Many intriguing quantum states of matter, such as unconventional superconductivity, magnetic phases and fractional Hall physics, emergent from the spatially-correlated localized electrons in flat band solid materials. By using scanning tunneling microscopy spectroscopy (STM/STS), we report real-space investigation correlated superlattice 4Hb-TaSexS2-x. In contrast with pristine 4Hb-TaS2, selenium (Se) substitutions significantly affect interfacial transfer between CDW 1T- 1H-TaS2 layers, contribute a electron-filling configurations distributed electron-filled -void SoD clusters 1T-layer. The site-specific STS spectra directly reveal their respective prominent weight above EF symmetric Mott-like spectra. addition, spatial distributions these SoDs 1T-layer 4Hb-TaSe0.7S1.3 demonstrate different local short-range patterning, clearly indicating complex neighboring interactions among Our results not only provide an in-depth insight band, simple platform to manipulate electron-correlation-related states.