1T-TaS2 (1T phase Tantalum Disulfide)
1T-TaS2 at ambient pressure shows a metallic phase at high temperatures (>550K), an incommensurate CDW (ICCDW) phase below 550 K, a nearly commensurate CDW (NCCDW) phase below 350 K and a commensurate CDW (CCDW) phase including a Mott phase below ~180 K.
The layers are stacked together via van der Waals interactions and can be exfoliated into thin 2D layers. 1T TaS2 belongs to the group-V transition metal dichalcogenides (TMDC). Please note that Tantalum Disulfide also exists as 2H phase, for more information on the 2H phase TaS2 click here.
The 1T phase TaS2 crystals produced at HQ Graphene have a typical lateral size of ~0.6-0.8 cm, are hexagonal shaped and have a metallic appearance.
| Crystal size | ~8 mm |
| Electrical properties | Semiconductor, Charge density waves (CDW) system, Mott phase |
| Crystal structure | hexagonal |
| Unit cell parameters | a = b = 0.336 nm, c = 0.590 nm, α = β = 90°, γ = 120° |
| Type | Synthetic |
| Purity | >99.995 % |
| Characterized by | XRD, Raman, EDX |
| More information? | Please contact us by email or phone |
The single crystal 1T-TaS2 is characterized using:
XRD: single crystal and powder X-ray diffraction (D8 Venture Bruker and D8 Advance Bruker)EDX: Energy-dispersive X-ray spectroscopy for stoichiometric analysis
Raman: 785 nm Raman system
Raman, XRD and EDX on 1T-TaS2:
Click on an image to zoom
HQ Graphene Wiki on:
1T TaS2 (Tantalum Disulfide)
1. Zhao, Y., et al. "Spectroscopic visualization and phase manipulation of chiral charge density waves in 1T-TaS2." Nature Communications 14.1 (2023): 2223.
2. Mohammadzadeh, A., et al. "Evidence for a thermally driven charge-density-wave transition in 1T-TaS2 thin-film devices: Prospects for GHz switching speed." Applied Physics Letters 118.9 (2021): 093102.
3. Singh, M., et al. "Lattice-driven chiral charge density wave state in 1 T− TaS 2." Physical Review B 106.8 (2022): L081407.
4. Li, Y., et al. "Electronic states of domain walls in commensurate charge density wave ground state and mosaic phase in 1T-TaS2." Chinese Physics B (2023).