Table 1 Comparison of different experimental techniques for PhP measurements
From: Observation of the nonanalytic behavior of optical phonons in monolayer hexagonal boron nitride
Raman | s-SNOM | STEM-EELS | 2D-HREELS | |
|---|---|---|---|---|
Detection type | Energy and momentum transfer in momentum-space | Standing wave in real-space | Standing wave in real-space | Energy and momentum transfer in momentum-space |
Spatial resolution | ~30 μm60 | ~10 nm19 | ~0.2 nm35 | ~1 mm |
Momentum resolution | ~10−7 Å−1 (ref. 47) | Better than 10−7 Å−1 (ref. 18)a | Better than 10−7 Å−1 (ref. 35)a | 10−3 Å−1 |
Energy resolution | ~0.1 meV47 | ~10−2 meV61 | 5.5 meV44 | ~1 meV |
Momentum range | 0 ≤ q ≤ 10−3 Å−1 (ref. 47) | 0 < q ≤ 10−3 Å−1 (ref. 19) | 0 < q ≤ 10−2 Å−1 (ref. 35) | 0 ≤ q ≤ 2 Å−1 |
