Thermal transport mapping in twisted double bilayer graphene
Abstract
Two-dimensional (2D) materials have attracted significant interest due to their tunable physical properties when stacked into homo- and hetero-structures. Twisting adjacent layers introduces moir\'{e} patterns that strongly influence the material electronic and thermal behavior. In twisted graphene systems, the twist angle critically alters phonon transport, leading to reduced thermal conductivity compared to Bernal-stacked configurations. However, experimental investigations into thermal transport in twisted structures remain limited. Here, we study the local thermal properties of twisted double bilayer graphene (TDBG) using Scanning Thermal Microscopy (SThM). We find an increase in thermal resistance of compared to untwisted bilayers, attributed to changes in both intrinsic thermal conductivity and the tip-sample interface. These results, supported by analytical modeling, provide new insight into thermal transport mechanisms in twisted 2D systems and offer a pathway toward thermal engineering in twistronic devices.
Keywords
Cite
@article{arxiv.2505.12957,
title = {Thermal transport mapping in twisted double bilayer graphene},
author = {Roop Kumar Mech and Alessandra Canetta and Yubin Huang and Sergio Gonzalez-Munoz and Khushboo Agarwal and Pauline de Crombrugghe and Yuanzhuo Hong and Sambit Mohapatra and Kenji Watanabe and Takashi Taniguchi and Bernard Nysten and Benoît Hackens and Rebeca Ribeiro-Palau and Oleg Kolosov and Jean Spèce and Pascal Gehring},
journal= {arXiv preprint arXiv:2505.12957},
year = {2025}
}