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2H-NbS2 (2H phase Niobium Disulfide)
NbS2 (2H phase) is a metal, a superconductor with a Tc ~6K and a charge density waves (CDW) system. Note that NbS2 also exists in the 3R-NbS2 phase (for the 3R phase NbS2 click here) The layers are stacked together via van der Waals interactions and can be exfoliated into thin 2D layers. NbS2 belongs to the group-V transition metal dichalcogenides (TMDC).
The 2H NbS2 crystals produced at HQ Graphene have a typical lateral size of ~0.2 cm, trigonal/hexagonal shaped and have a metallic appearance.
2H NbS2 crystal properties
| Crystal size | ~2 mm |
| Electrical properties | metal?, superconductor (Tc~6K), charge density waves (CDW) system. |
| Crystal structure | hexagonal |
| Unit cell parameters | a = b = 0.332 nm, c = 1.197 nm, α = β = 90, γ = 120° |
| Type | Synthetic |
| Purity | >99.995 % |
| Characterized by | XRD, Raman, EDX |
The single crystal 2H NbS2 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
