Metastable magnetic domains and the anomalous B∥=0 resistance peak in twisted double bilayer graphene
Abstract
In graphene moirés, valley polarization gives rise to orbital magnetism, manifested as an anomalous Hall effect and resulting in Barkhausen jumps in longitudinal resistance when changing domain configurations modify quasiparticle scattering. Beyond a simple picture of polarized domains, however, spin and valley textures within and between the domains are less well understood, as is the effect of these textures on transport. In the valley-polarized quarter-metal state of twisted double bilayer graphene, a sharp and metastable peak in longitudinal resistance often appears at zero in-plane magnetic field, whose microscopic origin has yet to be identified. Here, we show that this peak depends on the configuration of domains of orbital magnetism, which is itself set by the gate-voltage trajectory used to enter the ordered state and by the magnetic field --- particularly the in-plane component --- present during that trajectory. The sensitivity of the effect to in-plane magnetic field components points to spin, linked to valley polarization through spin-orbit coupling, as the key degree of freedom in both the domain formation and the resistance peak.
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BibTeX
@misc{gao2026metastable,
title = {{Metastable magnetic domains and the anomalous $B_\parallel=0$ resistance peak in twisted double bilayer graphene}},
author = {Zhenxiang Gao and Christopher Coleman and Silvia Lüscher and Ruiheng Su and Manabendra Kuiri and Kenji Watanabe and Takashi Taniguchi and Nemin Wei and Chunli Huang and Joshua Folk},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2608.25263},
eprint = {2608.25263},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.25263},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Metastable magnetic domains and the anomalous B_∥=0 resistance peak in twisted double bilayer graphene
AU - Zhenxiang Gao
AU - Christopher Coleman
AU - Silvia Lüscher
AU - Ruiheng Su
AU - Manabendra Kuiri
AU - Kenji Watanabe
AU - Takashi Taniguchi
AU - Nemin Wei
AU - Chunli Huang
AU - Joshua Folk
PY - 2026
DA - 2026/09/06
PB - arXiv
DO - 10.48550/arxiv.2608.25263
UR - https://arxiv.org/abs/2608.25263
AB - In graphene moirés, valley polarization gives rise to orbital magnetism, manifested as an anomalous Hall effect and resulting in Barkhausen jumps in longitudinal resistance when changing domain configurations modify quasiparticle scattering. Beyond a simple picture of polarized domains, however, spin and valley textures within and between the domains are less well understood, as is the effect of these textures on transport. In the valley-polarized quarter-metal state of twisted double bilayer graphene, a sharp and metastable peak in longitudinal resistance often appears at zero in-plane magnetic field, whose microscopic origin has yet to be identified. Here, we show that this peak depends on the configuration of domains of orbital magnetism, which is itself set by the gate-voltage trajectory used to enter the ordered state and by the magnetic field --- particularly the in-plane component --- present during that trajectory. The sensitivity of the effect to in-plane magnetic field components points to spin, linked to valley polarization through spin-orbit coupling, as the key degree of freedom in both the domain formation and the resistance peak.
ER -