2022年4月3日 · Our research demonstrates that Raman scattering in bulk 1T-TaS 2 is a complex phenomenon, which must be analyzed in terms of the influence of light illumination, resonant effects, and optical activity. Bulk 1T-TaS 2 (hqGraphene) crystals were examined by means of Raman spectroscopy using a Horiba T64000 spectrometer.

2023年4月19日 · Here, we demonstrate the phase manipulation of two-dimensional chiral charge density waves and the design of in-plane chiral homostructures in 1T-TaS 2. We use chiral Raman spectroscopy to...

2022年7月25日 · In this work the characterization of the Raman spectrum, specifically of the E \ [_ { {\bf 2g}}^ {\bf 1}\] - and A1g -modes, of mechanically exfoliated Ta 1−x Mo x S 2, a metallic TMD which exhibits charge density wave (CDW) formation and superconductivity, is presented.

1976年11月1日 · Raman measurements on the 1 T -polytype of TaS 2 are reported. In the commensurate charge density wave state, a large number of Raman-active peaks are observed below 400 cm -1. Most of these peaks are attributed to k = 0 optic phonons resulting from superlattice formation.

2016年3月17日 · In its bulk state, TaS 2 is composed of robust covalently bonded S–Ta–S planes that stack upon each other. A variety of polytypic phases originate from the distinct in-plane Ta coordination...

2001年1月12日 · The present work demonstrates that the three Raman modes observed above 220 cm −1 (high frequency region) at room temperature exhibit remarkable frequency changes toward low wavenumbers in the vicinity of 200 K, where 1T-TaS 2 undergoes a first-order transition of the charge density wave (CDW) from nearly commensurate to a commensurate state.

2019年3月13日 · Here, we investigated the electric-field-driven multistate CDW phase transition by Raman spectroscopy and voltage oscillations in 1 T-TaS 2. Strong correlation was observed between electrical conductivity and intensity of fold-back …

Raman measurements as a function of temperature from (c) 1T-TaS2 and (d) 2H-TaS2 demonstrate that the NCCDW-CCDW phase transition in 1T leads to the formation of new Raman peaks, while the...

Raman spectra obtained under circularly polarized excitation demonstrate that 1T-TaS2 indeed shows ROA, providing strong evidence that 1T-TaS2 is chiral under the used conditions of laser excitation. Our results suggest that ROA may be used as a universal tool to study chiral properties of quantum materials.

2022年7月25日 · In this work the characterization of the Raman spectrum, specifically of the E2g1\ [_ { {\bf 2g}}^ {\bf 1}\]‐ and A1g‐modes, of mechanically exfoliated Ta1−xMoxS2, a metallic TMD which exhibits...