Emergent electronic insulating states in a one-dimensional moiré superlattice
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915615303794688 |
|---|---|
| author | Bi, Jianfeng Minamikawa, Masaki Dong, Ruige Kang, DongJun Weng, Zihan Sun, Shaoqi Watanabe, Kenji Taniguchi, Takashi Okumura, Ryosuke Wu, Huizhen Nakatsuji, Naoto Yoo, SeokJae Koshino, Mikito Zhao, Sihan |
| author_facet | Bi, Jianfeng Minamikawa, Masaki Dong, Ruige Kang, DongJun Weng, Zihan Sun, Shaoqi Watanabe, Kenji Taniguchi, Takashi Okumura, Ryosuke Wu, Huizhen Nakatsuji, Naoto Yoo, SeokJae Koshino, Mikito Zhao, Sihan |
| contents | Two-dimensional (2D) van der Waals (vdW) moiré superlattices have provided a powerful knob to engineer a plethora of new quantum states. However, extending such moiré engineering to one-dimensional (1D) vdW systems has remained challenging. Here we report the moiré-engineered electronic insulating states in a new 1D moiré superlattice, by crystallographically aligning an armchair single-walled carbon nanotube (SWNT) to 2D hexagonal boron nitride (hBN) substrate. Remarkably, we observe the emergence of pronounced insulating states at charge neutrality point (CNP), full and half moiré fillings in lattice-aligned armchair SWNT/hBN heterostructures by low-temperature electrical transport measurements. In strong contrast, armchair SWNT devices without hBN alignment do not show any of these insulating behaviors, providing compelling evidence for the significant 1D moiré effect. Our density functional theory (DFT) and tight-binding calculations reveal that synergetic nanotube partial flattening and in-plane lattice reconstruction at 1D moiré interface expand the most stable AB' stacking regions (carbon on top of boron) and open sizable band gaps at both CNP and full moiré fillings at the single-particle level. Our one-body theory predicts no band gaps at half moiré fillings, suggesting that electron correlation and/or electron-phonon interaction may give rise to these emergent insulating behaviors in our 1D moiré systems. Our work establishes a new and definite moiré engineering route for 1D vdW materials and opens an exciting avenue for exploring interaction-induced quantum phases in 1D. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_10140 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Emergent electronic insulating states in a one-dimensional moiré superlattice Bi, Jianfeng Minamikawa, Masaki Dong, Ruige Kang, DongJun Weng, Zihan Sun, Shaoqi Watanabe, Kenji Taniguchi, Takashi Okumura, Ryosuke Wu, Huizhen Nakatsuji, Naoto Yoo, SeokJae Koshino, Mikito Zhao, Sihan Mesoscale and Nanoscale Physics Two-dimensional (2D) van der Waals (vdW) moiré superlattices have provided a powerful knob to engineer a plethora of new quantum states. However, extending such moiré engineering to one-dimensional (1D) vdW systems has remained challenging. Here we report the moiré-engineered electronic insulating states in a new 1D moiré superlattice, by crystallographically aligning an armchair single-walled carbon nanotube (SWNT) to 2D hexagonal boron nitride (hBN) substrate. Remarkably, we observe the emergence of pronounced insulating states at charge neutrality point (CNP), full and half moiré fillings in lattice-aligned armchair SWNT/hBN heterostructures by low-temperature electrical transport measurements. In strong contrast, armchair SWNT devices without hBN alignment do not show any of these insulating behaviors, providing compelling evidence for the significant 1D moiré effect. Our density functional theory (DFT) and tight-binding calculations reveal that synergetic nanotube partial flattening and in-plane lattice reconstruction at 1D moiré interface expand the most stable AB' stacking regions (carbon on top of boron) and open sizable band gaps at both CNP and full moiré fillings at the single-particle level. Our one-body theory predicts no band gaps at half moiré fillings, suggesting that electron correlation and/or electron-phonon interaction may give rise to these emergent insulating behaviors in our 1D moiré systems. Our work establishes a new and definite moiré engineering route for 1D vdW materials and opens an exciting avenue for exploring interaction-induced quantum phases in 1D. |
| title | Emergent electronic insulating states in a one-dimensional moiré superlattice |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2511.10140 |