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We investigate the role of long-range Coulomb interactions in $M$-valley moir\'es using the self-consistent Hartree-Fock approximation. This platform was recently proposed [Nature 643, 376 (2025) and arXiv:2411.18828 (2024)] as a new class…

介观与纳米尺度物理 · 物理学 2025-09-24 Christophe De Beule , Liangtao Peng , E. J. Mele , Shaffique Adam

Cross-plane thermal conductivity in homogeneous transition metal dichalcogenides (TMDs) exhibits a strong dependence on twist angle, originating from atomic reconstruction within moir\'e superlattices. This reconstruction redistributes…

材料科学 · 物理学 2025-05-02 Wenwu Jiang , Ting Liang , Hekai Bu , Jianbin Xu , Wengen Ouyang

Semiconductor moir\'e superlattices provide a highly tunable platform to study the interplay between electron correlation and band topology. For example, the generalized Kane-Mele-Hubbard model can be simulated by the topological moir\'e…

超导电性 · 物理学 2024-01-11 Xun-Jiang Luo , Wen-Xuan Qiu , Fengcheng Wu

Displacement fields are one of the main tuning knobs employed to engineer flat electronic band dispersions in twisted van der Waals multilayers. Here, we show that electric fields can also be used to tune the phonon dispersion of moir\'e…

介观与纳米尺度物理 · 物理学 2025-01-20 Alejandro Ramos-Alonso , Benjamin Remez , Daniel Bennett , Rafael M. Fernandes , Hector Ochoa

In twisted bilayers of semiconducting transition metal dichalcogenides (TMDs), a combination of structural rippling and electronic coupling gives rise to periodic moir\'e potentials that can confine charged and neutral excitations. Here, we…

介观与纳米尺度物理 · 物理学 2021-05-04 Sara Shabani , Dorri Halbertal , Wenjing Wu , Mingxing Chen , Song Liu , James Hone , Wang Yao , Dmitri N. Basov , Xiaoyang Zhu , Abhay N. Pasupathy

We propose a scheme to achieve breathing kagome moir\'e superlattices using three twisted layers of transition metal dichalcogenides. In this scheme, the top and bottom layers are twisted relative to the middle layer by small angles…

介观与纳米尺度物理 · 物理学 2025-03-18 Adrian Fedorko , Chao-Xing Liu , Zhen Bi

The moir\'e Hubbard model describes correlations in certain homobilayer twisted transition metal dichalcogenides. Using exact diagonalization and density matrix renormalization group methods, we find magnetic Mott insulating and metallic…

强关联电子 · 物理学 2022-11-15 Alexander Wietek , Jie Wang , Jiawei Zang , Jennifer Cano , Antoine Georges , Andrew Millis

Mott-Hubbard and Hund electron correlations have been realized thus far in separate classes of materials. Here, we show that a single moir\'e homobilayer encompasses both kinds of physics in a controllable manner. We develop a microscopic…

强关联电子 · 物理学 2023-01-26 Siheon Ryee , Tim O. Wehling

Transition metal-intercalated transition metal dichalcogenides (TMDs) are promising platforms for next-generation spintronic devices based on their wide range of electronic and magnetic phases, which can be tuned by varying the host lattice…

材料科学 · 物理学 2023-10-10 Berit H. Goodge , Oscar Gonzalez , Lilia S. Xie , D. Kwabena Bediako

Intercalation and stacking order modulation are two active ways in manipulating the interlayer interaction of transition metal dichalcogenides (TMDCs), which lead to a variety of emergent phases and allow for engineering material…

Layered van der Waals materials have risen as powerful platforms to artificially engineer correlated states of matter. Here we show the emergence of a multiferroic order in a twisted dichalcogenide bilayer superlattice at quarter-filling.…

强关联电子 · 物理学 2022-09-07 Mikael Haavisto , J. L. Lado , Adolfo O. Fumega

The discovery of unconventional ferroelectric behavior in twisted bilayers has prompted the consideration of moir\'e heterostructures as polar materials. However, misconceptions about the nature and origin of the observed ferroelectricity…

介观与纳米尺度物理 · 物理学 2022-09-20 Daniel Bennett

Geometrical moir\'e patterns, generic for almost aligned bilayers of two-dimensional (2D) crystals with similar lattice structure but slightly different lattice constants, lead to zone folding and miniband formation for electronic states.…

介观与纳米尺度物理 · 物理学 2019-04-01 David A. Ruiz-Tijerina , Vladimir I. Fal'ko

Twistronic assembly of 2D materials employs the twist angle between adjacent layers as a tuning parameter for designing the electronic and optical properties of van der Waals heterostructures. Here, we study how interlayer hybridization,…

介观与纳米尺度物理 · 物理学 2021-06-21 Fábio Ferreira , Samuel Magorrian , Vladimir Enaldiev , David Ruiz-Tijerina , Vladimir Fal'ko

Transition metal dichalcogenides (TMDs), such as MoS$_2$, are known to undergo a structural phase transformation as well as a change in the electronic conductivity upon Li intercalation. These properties make them candidates for…

材料科学 · 物理学 2021-07-28 C. D. Spataru , M. D. Witman , R. E. Jones

We present a comprehensive dynamical mean field study of the triangular lattice moir\'e Hubbard model, which is believed to represent the physics of moir\'e bilayer transition metal dichalcogenides. In these materials, important aspects of…

强关联电子 · 物理学 2022-06-28 Jiawei Zang , Jie Wang , Jennifer Cano , Antoine Georges , Andrew J. Millis

Quantum particles on a lattice with competing long-range interactions are ubiquitous in physics. Transition metal oxides, layered molecular crystals and trapped ion arrays are a few examples out of many. In the strongly interacting regime,…

We demonstrate a generic mechanism to realize topological flat minibands by confining massive Dirac fermions in a periodic moir\'e potential, which can be achieved in a heterobilayer of transition metal dichalcogenides. We show that the…

介观与纳米尺度物理 · 物理学 2022-10-28 Ying Su , Heqiu Li , Chuanwei Zhang , Kai Sun , Shi-Zeng Lin

In the emerging world of twisted bilayer structures, the possible configurations are limitless, which enables for a rich landscape of electronic properties. In this paper, we focus on twisted bilayer transition metal dichalcogenides (TMDCs)…

介观与纳米尺度物理 · 物理学 2021-01-04 Yipei Zhang , Zhen Zhan , Francisco Guinea , Jose Angel Silva-Guillen , Shengjun Yuan

Motivated by twisted transition metal dichalcogenides (TMDs), we study an extended Hubbard model with both on-site and off-site repulsive interactions, in which Mott insulating states with concomitant charge order occur at fractional…

强关联电子 · 物理学 2025-07-10 Zhenhao Song , Urban F. P. Seifert , Leon Balents , Hong-Chen Jiang