2021年12月16日 · By using scanning tunnelling microscopy (STM), we demonstrate that at small twist angles, the moiré pattern traps the CDW domain in the 1T-TiTe 2 monolayer and substantially enhances its ...

2022年1月10日 · After ruling out the possibility of moiré superlattices, according to the correlation of the wave vectors of the superstructure and the large indirect band gap below the Fermi level, we propose that the incommensurate superstructure is associated with an incommensurate charge density wave (I-CDW).

2012年12月1日 · Scanning tunneling microscopy (STM) and X-ray photoelectron diffraction (XPD) are applied to study the surface of layered dichalcogenide 1 T -TiSe 2.

2021年1月22日 · Transport data on Pt substituted for Ti in 1T-TiSe2 shows a dramatic increase of resistivity by five orders of magnitude for few % of Pt substitution, with a power-law dependence of the ...

2020年12月31日 · Combining density functional theory and STM to analyze the CDW pattern and modulation amplitude in 1 T − TiSe 2, we find that CI takes place at an unexpected negative sample bias because the CDW gap opens away from E F, deep inside the valence band. This bias becomes increasingly negative as the CDW gap shifts to higher binding energy with ...

2015年8月4日 · We present a detailed low-temperature scanning tunneling microscopy (STM) study of the commensurate charge density wave (CDW) in 1 T − TiSe 2 in the presence of single atom defects. We find no significant modification of the CDW lattice in single crystals with native defect concentrations where some bulk probes already measure substantial ...

2010年6月1日 · We report the chirality of charge density waves (CDW) in 1T-TiSe 2 by using scanning tunneling microscopy (STM) measurements. We found that the CDW intensity becomes Ia 1: Ia 2: Ia 3 = 1: 0.7 ± 0.1: 0.5 ± 0.1, where Ia i (i = 1, 2, 3) is the amplitude of the tunneling current contributed by the CDWs.

The transition metal dichalcogenide 1T-TiSe2 is a quasi-two-dimensional layered material undergoing a commensurate 2 x 2 x 2 charge density wave (CDW) transition with a weak periodic lattice...

2024年1月3日 · We reinvestigate the representative but debated chiral CDW of TiSe 2 using scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. Our STM data reveal unambiguously the chiral distortion of the topmost Se layer in domains of opposite chirality, which are interfaced with a novel domain wall.

通过扫描隧道显微镜（STM）研究，他们发现了莫尔增强的电荷密度波态（charge density wave, CDW），为该领域国际创新突破。 这项工作不仅攻克了利用外延方法调控范德华转角自由度的难题，同时也开启了在1T相过渡金属硫族化物的转角体系中探索奇异物性的新篇章。