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arXiv · 2505.12957

Thermal transport mapping in twisted double bilayer graphene

Roop Kumar Mech·Alessandra Canetta·Yubin Huang·Sergio Gonzalez-Munoz·Khushboo Agarwal·Pauline de Crombrugghe·Yuanzhuo Hong·Sambit Mohapatra·Kenji Watanabe·Takashi Taniguchi·Bernard Nysten·Benoît Hackens·Rebeca Ribeiro-Palau·Oleg Kolosov·Jean Spèce·Pascal Gehring
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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 $0.3 \pm 0.1 \times 10^6 KW^{-1}$ 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.

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Roop Kumar Mech, Alessandra Canetta, Yubin Huang, Sergio Gonzalez-Munoz, Khushboo Agarwal, Pauline de Crombrugghe, Yuanzhuo Hong, Sambit Mohapatra, Kenji Watanabe, Takashi Taniguchi, Bernard Nysten, Benoît Hackens, Rebeca Ribeiro-Palau, Oleg Kolosov, Jean Spèce, Pascal Gehring. 2025-05-19. Thermal transport mapping in twisted double bilayer graphene. https://arxiv.org/abs/2505.12957

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