| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1545088 | Physica E: Low-dimensional Systems and Nanostructures | 2013 | 5 Pages |
Electronic thermal conductivity κe is investigated, using Boltzmann transport equation approach, in a suspended and supported bilayer graphene (BLG) as a function of temperature and electron concentration. The electron scattering due to screened charged impurity, short-range disorder and acoustic phonon via deformation potential are considered for both suspended and supported BLG. Additionally, scattering due to surface polar phonons, is considered in supported BLG. In suspended BLG, calculated κe is compared with the experimental data leaving the phonon thermal conductivity. It is emphasized that κe is important in samples with very high electron concentration and reduced phonon thermal conductivity. κe is found to be about two times smaller in supported BLG compared to that in suspended BLG. With the reduced extrinsic disorders, in principle, the intrinsic scattering by acoustic phonons can set a fundamental limit on possible intrinsic κe.
Graphical abstractElectronic thermal conductivity κe is calculated in a bilayer graphene as a function of temperature and electron concentration. An agreement is obtained with the recent experimental results.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Electronic thermal conductivity κe is investigated in a bilayer graphene (BLG). ► An agreement is obtained with the experimental data in a suspended BLG. ► Acoustic phonon scattering is found to limit κe over large range of T. ► Acoustic phonon scattering expected to set fundamental limit on possible intrinsic κe. ► κe is important in samples with high concentration and low phonon thermal conductivity.
