Results 51 to 60 of about 26,219 (160)

Displacive In‐Plane Ferroelectricity with Domain‐Specific Curie Temperature in Van der Waals Semiconductors

Advanced Science, EarlyView.
Temperature‐dependent electron diffraction on tin monochalcogenides demonstrates a gradual displacive transformation between ferroelectric and paraelectric phases with significant variability in lattice constants and Curie temperature (TC). Periodic variations exist even between domains in individual crystals, implying a domain‐specific Curie ...
Peter Sutter, Eli Sutter
wiley   +1 more source

Moiré-induced modulation of out-of-plane elasticity in twisted hBN

Nature Communications
Moiré superlattices in twisted van der Waals materials provide a versatile platform where interlayer interactions generate periodic variations of atomic registry and local physical properties.
Stefano Chiodini, Lin Nan, Giacomo Venturi, Thomas Poirier, James H. Edgar, Antonio Ambrosio   +5 more
doaj   +1 more source

Polarization Dynamics in Ferroelectrics: Insights Enabled by Machine Learning Molecular Dynamics

Advanced Science, EarlyView.
Machine learning molecular dynamics is presented as a route to capture polarization switching, domain wall kinetics, topological polar textures, and polar mechanical coupling beyond the limits of conventional atomistic methods. This Perspective surveys recent progress and identifies key methodological directions, including long‐range electrostatics ...
Dongyu Bai, Ri He, Junxian Liu, Liangzhi Kou   +3 more
wiley   +1 more source

Moiré Folded Helical States at the Interfaces of Heterostructures

Advanced Physics Research
A minimal model of a graphene–topological‐insulator heterostructure is considered, where a moiré superlattice modulates the Rashba spin–orbit interaction (SOC). In the spin‐degenerate, spin–orbit—free limit, the reduced Brillouin zone contains flat, spin‐
Paula Mellado
doaj   +1 more source

Flat Bands Induced by Non‐Collinear Antiferromagnetism in CoBi2Te4

Advanced Science, EarlyView.
Flat bands emerge at the edges of intrinsically non‐collinear antiferromagnetic CoBi2Te4 two‐septuple layers through the interplay of spin–orbit coupling–driven band inversion and non‐collinear antiferromagnetism, uncovering a previously unexplored mechanism for flat‐band formation and opening new opportunities for strongly correlated quantum states ...
Ziyuan Zhao, Yuefeng Yin, Jinxing Gu, Mark T. Edmonds, Nikhil V. Medhekar   +4 more
wiley   +1 more source

Switchable moiré potentials in ferroelectric WTe2/WSe2 superlattices

, 2023
Moiré materials with superlattice periodicity many times the atomic length scale have shown strong electronic correlations and band topology with unprecedented tunability.
Zeng, Yihang, Taniguchi, Takashi, Kenji Watanabe, Shan, Jie, Wenjin Zhao, Kin Fai Mak, Zhao, Wenjin, Kang, Kaifei, Jie Shan, Takashi Taniguchi, Watanabe, Kenji, Yihang Zeng, Mak, Kin Fai, Kaifei Kang   +13 more
core   +1 more source

Interplay of valley, layer and band topology towards interacting quantum phases in moiré bilayer graphene

Nature Communications
In Bernal-stacked bilayer graphene (BBG), the Landau levels give rise to an intimate connection between valley and layer degrees of freedom. Adding a moiré superlattice potential enriches the BBG physics with the formation of topological minibands ...
Yungi Jeong, Hangyeol Park, Taeho Kim, Kenji Watanabe, Takashi Taniguchi, Jeil Jung, Joonho Jang   +6 more
doaj   +1 more source

Visualizing moiré ferroelectricity via plasmons and nano-photocurrent in graphene/twisted-WSe2 structures

Nature Communications, 2023
Ferroelectricity, a spontaneous and reversible electric polarization, is found in certain classes of van der Waals (vdW) materials. The discovery of ferroelectricity in twisted vdW layers provides new opportunities to engineer spatially dependent ...
Shuai Zhang, Yang Liu, Zhiyuan Sun, Xinzhong Chen, Baichang Li, S. L. Moore, Song Liu, Zhiying Wang, S. E. Rossi, Ran Jing, Jordan Fonseca, Birui Yang, Yinming Shao, Chun-Ying Huang, Taketo Handa, Lin Xiong, Matthew Fu, Tsai-Chun Pan, Dorri Halbertal, Xinyi Xu, Wenjun Zheng, P. J. Schuck, A. N. Pasupathy, C. R. Dean, Xiaoyang Zhu, David H. Cobden, Xiaodong Xu, Mengkun Liu, M. M. Fogler, James C. Hone, D. N. Basov   +30 more
doaj   +1 more source

Van der Waals Heterostructures for Next‐Generation Spintronics: Multiferroic‐Mediated Magnetoelectric Properties

Advanced Science, EarlyView.
As CMOS technology approaches fundamental energy limits, new paradigms for low‐power information processing are required. Magnetic systems are attractive for their spin transport, yet current‐induced magnetization control is energy inefficient. Multiferroic heterostructures enable energy‐efficient electric field manipulation of magnetism.
Donghyeon Lee, Jiwoong Yang, Inhyeok Oh, Sanghan Lee   +3 more
wiley   +1 more source

Moiré superlattice effects on interfacial mechanical behavior: A concise review

Interdisciplinary Materials
The moiré superlattice, arising from the interface of mismatched single crystals, intricately regulates the physical and mechanical properties of materials, giving rise to phenomena such as superconductivity and superlubricity. This study delves into the
Weidong Yan, Jiangtao Liu, Wengen Ouyang, Ze Liu   +3 more
doaj   +1 more source