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This content will become publicly available on October 20, 2018

Title: Temperature-Dependent Thermal Boundary Conductance of Monolayer MoS 2 by Raman Thermometry

The electrical and thermal behavior of nanoscale devices based on two-dimensional (2D) materials is often limited by their contacts and interfaces. Here we report the temperature-dependent thermal boundary conductance (TBC) of monolayer MoS 2 with AlN and SiO 2, using Raman thermometry with laser-induced heating. The temperature-dependent optical absorption of the 2D material is crucial in such experiments, which we characterize here for the first time above room temperature. We obtain TBC ~ 15 MW m –2 K –1 near room temperature, increasing as ~ T 0.65 in the range 300–600 K. The similar TBC of MoS 2 with the two substrates indicates that MoS 2 is the “softer” material with weaker phonon irradiance, and the relatively low TBC signifies that such interfaces present a key bottleneck in energy dissipation from 2D devices. As a result, our approach is needed to correctly perform Raman thermometry of 2D materials, and our findings are key for understanding energy coupling at the nanoscale.
ORCiD logo [1] ;  [2] ; ORCiD logo [1] ; ORCiD logo [1] ;  [1] ;  [3] ;  [1] ; ORCiD logo [1] ;  [1] ;  [1] ;  [2] ; ORCiD logo [1]
  1. Stanford Univ., Stanford, CA (United States)
  2. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Stanford Univ., Stanford, CA (United States); Univ. of Pittsburgh, Pittsburgh, PA (United States)
Publication Date:
Grant/Contract Number:
AC02-76SF00515; DGE-114747; EEC-1449548; 1542883; 1534279
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 9; Journal Issue: 49; Journal ID: ISSN 1944-8244
American Chemical Society (ACS)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
Country of Publication:
United States
36 MATERIALS SCIENCE; 2D materials; aluminum nitride (AlN); Kapitza length; MoS2; optical absorption; Raman thermometry; thermal boundary conductance (TBC)
OSTI Identifier: