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Layer-dependent electromechanical response in twisted graphene moiré superlattices
Hanhao Zhang, Yuanhao Wei, Yuhao Li +9
The coupling of mechanical deformation and electrical stimuli at the nanoscale has been a subject of intense investigation in the realm of materials science. Recently, twisted van…
Extrinsic nonlinear Kerr rotation in topological materials under a magnetic field
Shuang Wu, Zaiyao Fei, Zeyuan Sun +10
Topological properties in quantum materials are often governed by symmetry and tuned by crystal structure and external fields, and hence symmetry-sensitive nonlinear optical measur…
Symmetry breaking and anomalous conductivity in a double moiré superlattice
Yuhao Li, Minmin Xue, Hua Fan +13
A double moiré superlattice can be realized by stacking three layers of atomically thin two-dimensional materials with designer interlayer twisting or lattice mismatches. In this n…
Electric control of a canted-antiferromagnetic Chern insulator
Jiaqi Cai, Dmitry Ovchinnikov, Zaiyao Fei +11
The interplay between band topology and magnetism can give rise to exotic states of matter. For example, magnetically doped topological insulators can realize a Chern insulator tha…
Intertwined Topological and Magnetic Orders in Atomically Thin Chern Insulator MnBi2Te4
Dmitry Ovchinnikov, Xiong Huang, Zhong Lin +15
The interplay between band topology and magnetic order plays a key role in quantum states of matter. MnBi2Te4, a van der Waals magnet, has recently emerged as an exciting platform…
Determination of the spin axis in quantum spin Hall insulator monolayer WTe2
Wenjin Zhao, Elliott Runburg, Zaiyao Fei +9
Evidence for the quantum spin Hall (QSH) effect has been reported in several experimental systems in the form of approximately quantized edge conductance. However, the most fundame…
Electrically tunable correlated and topological states in twisted monolayer-bilayer graphene
Shaowen Chen, Minhao He, Ya-Hui Zhang +8
Twisted van der Waals heterostructures with flat electronic bands have recently emerged as a platform for realizing correlated and topological states with an extraordinary degree o…
Magnetic proximity and nonreciprocal current switching in a monolayer WTe2 helical edge
Wenjin Zhao, Zaiyao Fei, Tiancheng Song +8
The integration of diverse electronic phenomena, such as magnetism and nontrivial topology, into a single system is normally studied either by seeking materials that contain both i…
Switching 2D Magnetic States via Pressure Tuning of Layer Stacking
Tiancheng Song, Zaiyao Fei, Matthew Yankowitz +15
The physical properties of two-dimensional van der Waals (2D vdW) crystals depend sensitively on the interlayer coupling, which is intimately connected to the stacking arrangement…
Gate-induced superconductivity in a monolayer topological insulator
Ebrahim Sajadi, Tauno Palomaki, Zaiyao Fei +7
The layered semimetal WTe_2 has recently been found to be a two-dimensional topological insulator (2D TI) when thinned down to a single monolayer, with conducting helical edge chan…
Imaging Quantum Spin Hall Edges in Monolayer WTe2
Yanmeng Shi, Joshua Kahn, Ben Niu +9
A two-dimensional (2D) topological insulator (TI) exhibits the quantum spin Hall (QSH) effect, in which topologically protected spin-polarized conducting channels exist at the samp…
Two-Dimensional Itinerant Ising Ferromagnetism in Atomically thin Fe3GeTe2
Zaiyao Fei, Bevin Huang, Paul Malinowski +11
Recent discoveries of intrinsic two-dimensional (2D) ferromagnetism in insulating/semiconducting van der Waals (vdW) crystals open up new possibilities for studying fundamental 2D…
Edge conduction in monolayer WTe2
Zaiyao Fei, Tauno Palomaki, Sanfeng Wu +7
A two-dimensional topological insulator (2DTI) is guaranteed to have a helical 1D edge mode in which spin is locked to momentum, producing the quantum spin Hall effect and prohibit…
Photo-Nernst current in graphene
Helin Cao, Grant Aivazian, Zaiyao Fei +3
Photocurrent measurements provide a powerful means of studying the spatially resolved optoelectronic and electrical properties of a material or device. Generally speaking there are…
Electrical Tuning of Valley Magnetic Moment via Symmetry Control
Sanfeng Wu, Jason S Ross, Grant Aivazian +8
Crystal symmetry governs the nature of electronic Bloch states. For example, in the presence of time reversal symmetry, the orbital magnetic moment and Berry curvature of the Bloch…