WTe2 (Tungsten Ditelluride)

WTe2 Tungsten Ditelluride WTe2 is a semimetal and a type II Weyl semimetal (WSM). The layers are stacked together via van der Waals interactions and can be exfoliated into thin 2D layers. Tungsten Ditelluride belongs to the group-VI transition metal dichalcogenides (TMDC). To buy WTe2 crystals please click here.

The WTe2 crystals produced at HQ Graphene have a typical lateral size of ~0.6-0.8 cm, needle/rechtangular shaped and have a metallic appearance. We produce n-type WTe2, having a typical charge carrier density of ~1020cm-3 at room temperature. A selection of peer review publications on the WTe2 we sell can be found below.

WTe2 crystal properties
Crystal size ~10 mm
Electrical properties Semimetal, type II Weyl semimetal (WSM)
Crystal structure Orthorhombic P
Unit cell parameters a = 0.348 nm, b = 0.625 nm, c = 1.405 nm, α = β = γ = 90°
Monolayer properties Link to C2DB containing calculated properties
Type Synthetic
Purity >99.995 %
Characterized by XRD, Raman, EDX, Hall measurement
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The single crystal WTe2 is characterized using:

XRD: single crystal and powder X-ray diffraction (D8 Venture Bruker and D8 Advance Bruker)
EDX: Stoichiometric analysis
Raman: 785nm Raman system
Hall measurement: Extraction of charge carrier density and doping in the Van der Pauw geometry.

Raman, XRD and EDX on WTe2:

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X-ray diffraction on a WTe2 single crystal aligned along the (001) plane. XRD was performed at room temperature using a D8 Venture Bruker. The 5 XRD peaks correspond, from left to right, to (00l) with l = 2, 4, 6, 8, 10

Powder X-ray diffraction (XRD) of a single crystal WTe2. X-ray diffraction was performed at room temperature using a D8 Venture Bruker.

Stoichiometric analysis of a single crystal WTe2 by Energy-dispersive X-ray spectroscopy (EDX).

Raman spectrum of a single crystal WTe2. Measurement was performed with a 785 nm Raman system at room temperature.

HQ Graphene Wiki on:

WTe2 (Tungsten Ditelluride)

1. Zhao, B., et al. "Unconventional charge-spin conversion in Weyl‐semimetal WTe2." Advanced Materials 32.38 (2020): 2000818.

2. Hou, F., et al. "Oxidation kinetics of WTe2 surfaces in different environments." ACS Applied Electronic Materials 2.7 (2020): 2196-2202.

3. Zhao, B., et al. "Observation of charge to spin conversion in Weyl semimetal WTe 2 at room temperature." Physical Review Research 2.1 (2020): 013286.

4. Wang, C., et al. "Van der Waals thin films of WTe2 for natural hyperbolic plasmonic surfaces." Nature communications 11.1 (2020): 1158.


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