AI Article Synopsis
- The orientation of exfoliated black phosphorus flakes is identified using electrical measurements by analyzing resistance across multiple contacts.
- Three resistance measurements help find the resistivity tensor, which shows how the material behaves differently in different directions.
- The resistivity anisotropy ratio decreases with higher temperature and carrier density, with a maximum of 3.0 at low conditions, and the mobility changes from being affected by impurities at low temperatures to phonon scattering at higher temperatures.
Article Abstract
The crystal orientation of an exfoliated black phosphorous flake is determined by purely electrical means. A sequence of three resistance measurements on an arbitrarily shaped flake with five contacts determines the three independent components of the anisotropic in-plane resistivity tensor, thereby revealing the crystal axes. The resistivity anisotropy ratio decreases linearly with increasing temperature T and carrier density reaching a maximum ratio of 3.0 at low temperatures and densities, while mobility indicates impurity scattering at low T and acoustic phonon scattering at high T.
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| http://dx.doi.org/10.1103/PhysRevLett.120.086801 | DOI Listing |
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