Work

Coexistence of size-dependent and size-independent thermal conductivities in phosphorene

Year: 2014

Type: article

Abstract: Thermal conductivity of single layer phosphorene is investigated by combining density functional calculations and the Peierls-Boltzmann transport equation. Differing from isotropic and divergent thermal conductivities in two-dimensional graphene and ${\mathrm{MoS}}_{2}$, a compelling coexistence of size-dependent and size-independent thermal conductivities is discovered for single layer black phosphorus (BP) along zigzag (ZZ) and armchair (AM) directions, respectively. Additionally, thermal conductivities in single layer phosphorene are found to be highly anisotropic because of orientation dependent group velocities and phonon relaxation times; e.g., thermal conductivities at 300 K are 83.5 and 24.3 W/m K along ZZ and AM directions, respectively, for single layer BP with a size of $10\phantom{\rule{0.28em}{0ex}}\ensuremath{\mu}\text{m}$.

Source: Physical Review B

DOI: 10.1103/physrevb.90.214302

Authors: Liyan Zhu, Gang Zhang, Baowen Li

Institutions: National University of Singapore, Institute of High Performance Computing, Tongji University

Language: English

Topic: Thermal properties of materials

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: Agency for Science, Technology and Research, Ministry of Education - Singapore, Ministry of Education, India

Award: G3480116956