Weida Wu
YOU?
Author Swipe
View article: Interwoven magnetic kagome metal overcomes geometric frustration
Interwoven magnetic kagome metal overcomes geometric frustration Open
Magnetic kagome materials provide a platform for exploring magneto-transport phenomena, symmetry breaking and charge ordering driven by the intricate interplay among electronic structure, topology and magnetism. Yet geometric frustration i…
View article: Nonvolatile Electric Control of Antiferromagnetic States on Nanosecond Timescales
Nonvolatile Electric Control of Antiferromagnetic States on Nanosecond Timescales Open
Electrical manipulation of antiferromagnetic (AFM) states, a cornerstone of AFM spintronics, is a great challenge, requiring novel material platforms. Here we report the full control over AFM states by voltage pulses in the insulating Co3O…
View article: Enhanced ferromagnetism in monolayer Cr<sub>2</sub>Te<sub>3</sub> via topological insulator coupling
Enhanced ferromagnetism in monolayer Cr<sub>2</sub>Te<sub>3</sub> via topological insulator coupling Open
Exchange-coupled interfaces are pivotal in exploiting two-dimensional (2D) ferromagnetism. Due to the extraordinary correlations among charge, spin, orbital and lattice degrees of freedom, layered magnetic transition metal chalcogenides (T…
View article: Toward Sustainable Land Management: Improving Ecological Risk Assessment by Incorporating Temporal–Spatial Activities of Protected Birds
Toward Sustainable Land Management: Improving Ecological Risk Assessment by Incorporating Temporal–Spatial Activities of Protected Birds Open
While methodologies for health risk assessment at contaminated sites are well established, ecological risk assessment remains in its exploratory stages. To explore suitable methods for evaluating the ecological risks of soil pollution, thi…
View article: Universal Superconductivity in FeTe and All‐Iron‐Based Ferromagnetic Superconductor Heterostructures
Universal Superconductivity in FeTe and All‐Iron‐Based Ferromagnetic Superconductor Heterostructures Open
Ferromagnetism (FM) and superconductivity (SC) are two of the most famous macroscopic quantum phenomena. However, nature normally does not allow SC and FM to coexist without significant degradation. Here, the first fully iron‐based SC/FM h…
View article: Meissner Effect and Nonreciprocal Charge Transport in Non-Topological 1T-CrTe2/FeTe Heterostructures
Meissner Effect and Nonreciprocal Charge Transport in Non-Topological 1T-CrTe2/FeTe Heterostructures Open
Interface-induced superconductivity has recently been achieved by stacking a magnetic topological insulator layer on an antiferromagnetic FeTe layer. However, the mechanism driving this emergent superconductivity remains unclear. Here, we …
View article: Atomic-Layer-Controlled Magnetic Orders in MnBi<sub>2</sub>Te<sub>4</sub>–Bi<sub>2</sub>Te<sub>3</sub> Topological Heterostructures
Atomic-Layer-Controlled Magnetic Orders in MnBi<sub>2</sub>Te<sub>4</sub>–Bi<sub>2</sub>Te<sub>3</sub> Topological Heterostructures Open
The natural van der Waals superlattice MnBi2Te4-(Bi2Te3)m provides an optimal platform to combine topology and magnetism in one system with minimal structural disorder. Here, we show that this system can harbor both ferromagnetic (FM) and …
View article: Enhanced Ferromagnetism in Monolayer Cr2Te3 via Topological Insulator Coupling
Enhanced Ferromagnetism in Monolayer Cr2Te3 via Topological Insulator Coupling Open
Exchange-coupled interfaces are pivotal in exploiting two-dimensional (2D) ferromagnetism. Due to the extraordinary correlations among charge, spin, orbital and lattice degrees of freedom, layered magnetic transition metal chalcogenides (T…
View article: Interface-Induced Superconductivity in Magnetic Topological Insulator-Iron Chalcogenide Heterostructures
Interface-Induced Superconductivity in Magnetic Topological Insulator-Iron Chalcogenide Heterostructures Open
When two different electronic materials are brought together, the resultant interface often shows unexpected quantum phenomena, including interfacial superconductivity and Fu-Kane topological superconductivity (TSC). Here, we use molecular…
View article: Hidden non-collinear spin-order induced topological surface states
Hidden non-collinear spin-order induced topological surface states Open
Rare-earth monopnictides are a family of materials simultaneously displaying complex magnetism, strong electronic correlation, and topological band structure. The recently discovered emergent arc-like surface states in these materials have…
View article: Second-harmonic signature of chiral spin structures in W/Pt/Co heterostructures with tunable magnetic anisotropy
Second-harmonic signature of chiral spin structures in W/Pt/Co heterostructures with tunable magnetic anisotropy Open
Second-harmonic Hall voltage (SHV) measurement method has been widely used to characterize the strengths of spin–orbit torques (SOTs) in heavy metal/ferromagnet thin films saturated in the single-domain regime. Here, we show that the magne…
View article: Vapor transport growth of MnBi<sub>2</sub>Te<sub>4</sub> and related compounds
Vapor transport growth of MnBi<sub>2</sub>Te<sub>4</sub> and related compounds Open
Motivated by fine tuning of the magnetic and topological properties of MnBi2Te4 via defect engineering, in this work, we report the crystal growth of MnBi2Te4 and related compounds using vapor transport method and crystal characterization …
View article: Controlled Ordering of Room-Temperature Magnetic Skyrmions in a Polar Van der Waals Magnet
Controlled Ordering of Room-Temperature Magnetic Skyrmions in a Polar Van der Waals Magnet Open
Control and understanding of ensembles of skyrmions is important for realization of future technologies. In particular, the order-disorder transition associated with the 2D lattice of magnetic skyrmions can have significant implications fo…
View article: Emergent Unusual Ferromagnetism and Insulator-Metal Transition in δ-Doped Ultrathin Ruthenates
Emergent Unusual Ferromagnetism and Insulator-Metal Transition in δ-Doped Ultrathin Ruthenates Open
Heterostructures of complex transition metal oxides are known to induce extraordinary emergent quantum states that arise from broken symmetry and other discontinuities at interfaces. Here we report the emergence of unusual, thickness-depen…
View article: Challenges in identifying chiral spin textures via the topological Hall effect
Challenges in identifying chiral spin textures via the topological Hall effect Open
Chiral spin textures such as skyrmions are of interest to the field of spintronics for their potential use in future computing devices. Hall effect measurements are a simple and powerful method to probe the electronic and magnetic properti…
View article: Room-temperature skyrmion lattice in a layered magnet (Fe <sub>0.5</sub> Co <sub>0.5</sub> ) <sub>5</sub> GeTe <sub>2</sub>
Room-temperature skyrmion lattice in a layered magnet (Fe <sub>0.5</sub> Co <sub>0.5</sub> ) <sub>5</sub> GeTe <sub>2</sub> Open
Novel magnetic ground states have been stabilized in two-dimensional (2D) magnets such as skyrmions, with the potential next-generation information technology. Here, we report the experimental observation of a Néel-type skyrmion lattice at…
View article: A magnetic Weyl semimetallic phase in thin films of Eu$_2$Ir$_2$O$_7$
A magnetic Weyl semimetallic phase in thin films of Eu$_2$Ir$_2$O$_7$ Open
The interplay between electronic interactions and strong spin-orbit coupling is expected to create a plethora of fascinating correlated topological states of quantum matter. Of particular interest are magnetic Weyl semimetals originally pr…
View article: Site Mixing for Engineering Magnetic Topological Insulators
Site Mixing for Engineering Magnetic Topological Insulators Open
The van der Waals compound, MnBi2Te4, is the first intrinsic magnetic topological insulator, providing a materials platform for exploring exotic quantum phenomena such as the axion insulator state and the quantum anomalous Hall effect. How…
View article: Chiral-Bubble-Induced Topological Hall Effect in Ferromagnetic Topological Insulator Heterostructures
Chiral-Bubble-Induced Topological Hall Effect in Ferromagnetic Topological Insulator Heterostructures Open
We report compelling evidence of an emergent topological Hall effect (THE) from chiral bubbles in a two-dimensional uniaxial ferromagnet, V-doped Sb2Te3 heterostructure. The sign of THE signal is determined by the net curvature of domain w…
View article: Magnetic domain engineering in SrRuO3 thin films
Magnetic domain engineering in SrRuO3 thin films Open
Magnetic domain engineering in ferromagnetic thin films is a very important route toward the rational design of spintronics and memory devices. Although the magnetic domain formation has been extensively studied, artificial control of magn…
View article: Native Defects in Antiferromagnetic Topological Insulator MnBi$_2$Te$_4$
Native Defects in Antiferromagnetic Topological Insulator MnBi$_2$Te$_4$ Open
Using scanning tunneling microscopy and spectroscopy, we visualized the native defects in antiferromagnetic topological insulator $\mathrm{MnBi_2Te_4}$. Two native defects $\mathrm{Mn_{Bi}}$ and $\mathrm{Bi_{Te}}$ antisites can be well res…
View article: Magnetic Imaging of Domain Walls in the Antiferromagnetic Topological Insulator MnBi<sub>2</sub>Te<sub>4</sub>
Magnetic Imaging of Domain Walls in the Antiferromagnetic Topological Insulator MnBi<sub>2</sub>Te<sub>4</sub> Open
The control of domain walls or spin textures is crucial for spintronic applications of antiferromagnets. Despite many efforts, it has been challenging to directly visualize antiferromagnetic domains or domain walls with nanoscale resolutio…
View article: In situ scanning probe microscopy studies of cross-coupled domains and domain walls. Final technical report
In situ scanning probe microscopy studies of cross-coupled domains and domain walls. Final technical report Open
The objective of this project is to explore the nanoscale emergent phenomena and to understand the unconventional properties of cross-coupled domains and domain walls in multiferroics, where both ferroelectricity and magnetism coexist. The…
View article: Intrinsic superstructure near atomically clean armchair step edges of graphite
Intrinsic superstructure near atomically clean armchair step edges of graphite Open
We investigated the electronic superstructure of graphite surface in the\nvicinity to monoatomic armchair step edges with scanning tunneling microscopy\nand spectroscopy. Only the ($\\sqrt{3}\\times\\sqrt{3}$)$\\textit{R}$30$^{\\circ}$\nsu…
View article: Pb-doped p-type Bi$_2$Se$_3$ thin films via interfacial engineering
Pb-doped p-type Bi$_2$Se$_3$ thin films via interfacial engineering Open
Due to high density of native defects, the prototypical topological insulator (TI), Bi$_2$Se$_3$, is naturally n-type. Although Bi$_2$Se$_3$ can be converted into p-type by substituting 2+ ions for Bi, only light elements such as Ca have b…