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Twisted van der Waals heterostructures unravel a new platform to study strongly correlated quantum phases. The interlayer coupling in these heterostructures is sensitive to twist angles ($\theta$) and key to controllably tune several exotic…

Materials Science · Physics 2019-12-03 Rahul Debnath , Indrajit Maity , Manish Jain , Arindam Ghosh

When two planar atomic membranes are placed within the van der Waals distance, the charge and heat transport across the interface are coupled by the rules of momentum conservation and structural commensurability, leading to outstanding…

Mesoscale and Nanoscale Physics · Physics 2018-01-08 Phanibhusan S. Mahapatra , Kingshuk Sarkar , H. R. Krishnamurthy , Subroto Mukerjee , Arindam Ghosh

Twisted van der Waals (vdW) heterostructures have recently emerged as an attractive platform to study tunable correlated electron systems. However, the quantum mechanical nature of vdW heterostructures makes their theoretical and…

Mesoscale and Nanoscale Physics · Physics 2021-04-28 S. Minhal Gardezi , Harris Pirie , William Dorrell , Jennifer E. Hoffman

The discovery of interaction-driven insulating and superconducting phases in moir\'e van der Waals heterostructures has sparked considerable interest in understanding the novel correlated physics of these systems. While a significant number…

It is a matter of current debate whether the gate-tunable superconductivity in twisted bilayer graphene is phonon-mediated or arises from electron-electron interactions. The recent observation of the strong coupling of electrons to…

Superconductivity · Physics 2026-03-20 Glenn Wagner , Yves H. Kwan , Nick Bultinck , Steven H. Simon , S. A. Parameswaran

Twisted graphene multilayers have demonstrated to yield a versatile playground to engineer controllable electronic states. Here, by combining first-principles calculations and low-energy models, we demonstrate that twisted graphene…

Mesoscale and Nanoscale Physics · Physics 2020-09-04 Alejandro Lopez-Bezanilla , J. L. Lado

Twisted bilayer graphene (TBG) has attracted great interest in the last decade due to the novel properties it exhibited. It was revealed that e-phonon interaction plays an important role in a variety of phenomena in this system, such as…

Mesoscale and Nanoscale Physics · Physics 2024-10-29 Jun-Wei Li , Jia-Xing Zhang , Wei Chen

We report the details of construction and testing of a Quantum Twisting Microscope, a recently developed scanning probe instrument that enables twist angle dependent electronic measurements on layered materials. Our implementation is based…

Mesoscale and Nanoscale Physics · Physics 2026-04-07 Sayanwita Biswas , Ranjani Ramachandran , Patrick Irvin , Jeremy Levy

Conduction between graphene layers is suppressed by momentum conservation whenever the layer stacking has a rotation. Here we show that phonon scattering plays a crucial role in facilitating interlayer conduction. The resulting dependence…

Mesoscale and Nanoscale Physics · Physics 2015-06-12 V. Perebeinos , J. Tersoff , Ph. Avouris

The tunability of the interlayer coupling by twisting one layer with respect to another layer of two-dimensional materials provides a unique way to manipulate the phonons and related properties. We refer to this engineering of phononic…

Materials Science · Physics 2020-03-25 Indrajit Maity , Mit H. Naik , Prabal K Maiti , H. R. Krishnamurthy , Manish Jain

The control of elastic and inelastic electron tunneling relies on materials with well defined interfaces. Van der Waals materials made of two-dimensional constituents form an ideal platform for such studies. Signatures of acoustic phonons…

Magic-angle twisted bilayer graphene (TBG) has attracted significant interest recently due to the discoveries of diverse correlated and topological states in this system. Despite the extensive research on the electron-electron interaction…

Mesoscale and Nanoscale Physics · Physics 2022-10-13 Xiaoqian Liu , Ran Peng , Zhaoru Sun , Jianpeng Liu

Twisted van der Waals materials have risen as highly tunable platform for realizing unconventional superconductivity. Here we demonstrate how a topological superconducting state can be driven in a twisted graphene multilayer at a twist…

Mesoscale and Nanoscale Physics · Physics 2024-06-18 Maryam Khosravian , Elena Bascones , Jose L. Lado

Twisted van der Waals heterostructures provide a platform for studying a wide range of electron correlation phenomena, including unconventional superconductivity and correlated insulating states. However, fabricating such devices is…

Mesoscale and Nanoscale Physics · Physics 2025-05-30 Hyeon-Woo Jeong , Jiho Kim , Boknam Chae , Kenji Watanabe , Takashi Taniguchi , Gil-Ho Lee

The emergence of twistronics provides an unprecedented platform to modulate the band structure, resulting in exotic electronic phenomena ranging from ferromagnetism to superconductivity. However, such concept on phonon engineering is still…

Mesoscale and Nanoscale Physics · Physics 2020-08-25 Yufeng Zhang , Meng An , Dongxing Song , Haidong Wang , Weigang Ma , Xing Zhang

Moir\'e patterns arising from twisted van der Waals stacks fundamentally reshape their electronic properties, enabling band-structure engineering that has driven rapidly growing interest in this field. In studying electronic properties,…

Mesoscale and Nanoscale Physics · Physics 2025-11-12 Namkyung Lee , Hangyeol Park , Seungwon Jung , Baeksan Jang , Seonyu Lee , Joonho Jang

Plasmons in van der Waals heterostructures comprised of graphene and related layered materials demonstrate deep subwavelength confinement and large propagation length. In this letter, we show that graphene-insulator-graphene tunnel…

Mesoscale and Nanoscale Physics · Physics 2016-09-14 Dmitry Svintsov , Zhanna Devizorova , Taiichi Otsuji , Victor Ryzhii

Twist, as a simple and unique degree of freedom, could lead to enormous novel quantum phenomena in bilayer graphene. A small rotation angle introduces low-energy van Hove singularities (VHSs) approaching the Fermi level, which result in…

Materials Science · Physics 2018-02-07 Wei-Jie Zuo , Jia-Bin Qiao , Dong-Lin Ma , Long-Jing Yin , Gan Sun , Jun-Yang Zhang , Li-Yang Guan , Lin He

We develop a theory for a qualitatively new type of disorder in condensed matter systems arising from local twist-angle fluctuations in two strongly coupled van der Waals monolayers twisted with respect to each other to create a flat band…

Disordered Systems and Neural Networks · Physics 2020-06-30 Justin H. Wilson , Yixing Fu , S. Das Sarma , J. H. Pixley

Electron-phonon interaction is of central importance for the electrical and heat transport properties of metals, and is directly responsible for charge-density-waves or (conventional) superconducting instabilities. The direct observation of…

Superconductivity · Physics 2022-02-02 S. M. Souliou , A. Bosak , G. Garbarino , M. Le Tacon