WTe2
Structure
Crystal Image
Crystal Structure
Topview (along out-of-plane direction)
Structural property summary
- Single crystal form: flat, silver color, metallic luster
- Structure type: Layered, Pmn21
-
Exfoliation capability: very easy by mechanic exfoliation
-
Air sensitivity: Bulk – no; Nano flake – relatively sensitive
Transport Properties
Resistivity- Temperature dependence
- Metallic
- Large magnetoresistance
Hall – Magnetic field dependence
- Very large MR
- SdH oscillation can be probed >5T
- Chiral anomaly-induced negative longitudinal MR due to the Type-II Weyl fermions are generally observed in thin flake samples, not bulk samples
Hall effect
Multiple bands
Electron dominate transport at low T
Planar Hall effect
Inplane fields
Magnetic Properties
Magnetization- Temperature dependence
Note: very strong diamagnetic background from the sample holder
Magnetization- Magnetic field dependence
Note: Diamagnetic after removing background
Specific Heat
Specific Heat (C vs T)
Specific Heat (C/T vs T^2)
Notes: Sommerfeld coefficient: Gamma = 1.58 mJ/mol K^2