2015/12/31 by А. Н. Руденко, A. N. Rudenko, S. Brener +1 · 1 citation
Materials Science · Physics and Astronomy · #2D Materials and Applications #Anisotropy #Charge (physics) #Condensed matter physics #Electron #Electron mobility #Graphene research and applications #Phonon #Phonon scattering #Physics #Quantum mechanics #Scattering #Thermal properties of materials #cond-mat.mes-hall #cond-mat.mtrl-sci #physics.comp-ph
paper · pdf · doi:10.1103/physrevlett.116.246401
published as Phys. Rev. Lett. 116, 246401 (2016) · 9 pages, 6 figures (including Supplemental Material). Text is restructured compared to the original version, more discussions added
openalex publication_date 2016/06/14 · arxiv created 2016/06/16 · arxiv updated 2016/06/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present a theory for single- and two-phonon charge carrier scattering in anisotropic two-dimensional semiconductors applied to single-layer black phosphorus (BP). We show that in contrast to graphene, where two-phonon processes due to the scattering by flexural phonons dominate at any practically relevant temperatures and are independent of the carrier concentration n, two-phonon scattering in BP is less important and can be considered negligible at n\ensuremath\gtrsim1013 cm^\ensuremath-2. At smaller n, however, phonons enter in the essentially anharmonic regime. Compared to the hole mobility, which does not exhibit strong anisotropy between the principal directions of BP (\ensuremathμxx/\ensuremathμyy\ensuremath∼1.4 at n=1013 cm^\ensuremath-2 and T=300 K), the electron mobility is found to be significantly more anisotropic (\ensuremathμxx/\ensuremathμyy\ensuremath∼6.2). Absolute values of \ensuremathμxx do not exceed 250 (700) cm2 V^\ensuremath-1 s^\ensuremath-1 for holes (electrons), which can be considered as an upper limit for the mobility in BP at room temperature.