100 citations · 628 across the 23 of their papers we have counts for
25 papers
Ferroelastic Reversal Magnon Thermal Hall Effect in a Fully Compensated Ferrimagnet
Yingxi Bai, Zihan Chen, Chengwang Niu +1
Magnons offer a charge-neutral channel for spin and heat transport, yet reversible and nonvolatile control of their thermal Hall response poses a fundamental challenge in systems w…
Higher-Order Topological Phase in the Two-Dimensional Type-IV Magnet MgCrO
Xiaorong Zou, Hyeon Suk Shin, Yanmei Zang +4
Type-IV two-dimensional (2D) magnetism-a newly classified collinear magnetic phase featuring nonrelativistic spin degeneracy and spin-orbit-coupling-induced momentum-dependent spin…
Floquet-Engineered Odd-Parity Altermagnetic Higher-Order Topology in a Two-Dimensional Antiferromagnet CrCH
Xiaorong Zou, Hyeon Suk Shin, Baibiao Huang +5
Periodic driving provides a platform to dynamically tailor quantum states of matter, yet its impact on symmetry-protected topological phases remains incompletely understood. Here,…
Second-order topology in two-dimensional azulenoid kekulene carbon lattices
Xiaorong Zou, Hyeon Suk Shin, Chang-Jong Kang +5
The discovery of higher-order topological insulator (HOTI) has established a new paradigm for understanding symmetry-constrained boundary electronic states. Here, based on first-pr…
Magnonic Quantum Spin Hall Effect with Chiral Magnon Transport in Bilayer Altermagnets
Bo Yuan, Yingxi Bai, Ying Dai +2
Altermagnetism has attracted considerable interest, yet its associated spintronic phenomena have so far been largely confined to electronic systems. In this work, we uncover a univ…
Coexistence and tunability of orbital and spin Hall effects in RuO
Lishu Zhang, Mahmoud Zeer, Dongwook Go +8
Altermagnetic materials, especially RuO, have recently attracted considerable attention for their unique magnetic properties and energy-efficient spintronic applications. Howev…
Pyrochlore NaYbO2: A potential Quantum Spin Liquid Candidate
Chuanyan Fan, Tieyan Chang, Longlong Fan +14
The search for quantum spin liquids (QSL) and chemical doping in such materials to explore superconductivity have continuously attracted intense interest. Here, we report the disco…
Detection and control of electronic orbital magnetism by spin waves in honeycomb ferromagnets
Lichuan Zhang, Lu Zhang, Dongwook Go +6
Exploring and manipulating the orbital degrees of freedom in solids has become a fascinating research topic in modern magnetism. Here, we demonstrate that spin waves can provide a…
Topology-engineered orbital Hall effect in two-dimensional ferromagnets
Zhiqi Chen, Runhan Li, Yingxi Bai +7
Recent advances in manipulation of orbital angular momentum (OAM) within the paradigm of orbitronics present a promising avenue for the design of future electronic devices. In this…
Ferroelectric higher-order topological insulator in two dimensions
Ning Mao, Runhan Li, Xiaorong Zou +3
The interplay between ferroelectricity and band topology can give rise to a wide range of both fundamental and applied research. Here, we map out the emergence of nontrivial corner…
Terahertz spin-to-charge current conversion in stacks of ferromagnets and the transition-metal dichalcogenide NbSe
Lukáš Nádvorník, Oliver Gueckstock, Lukas Braun +16
Transition-metal dichalcogenides (TMDCs) are an aspiring class of materials with unique electronic and optical properties and potential applications in spin-based electronics. Here…
Orbital shift-induced boundary obstructed topological materials with a large energy gap
Ning Mao, Runhan Li, Ying Dai +3
We propose boundary obstructed topological phases caused by Wannier orbital shift between ordinary atomic sites, which, however, cannot be indicated by symmetry eigenvalues at high…
Doubled Quantum Spin Hall Effect with High-Spin Chern Number in -Antimonene and -Bismuthene
Yingxi Bai, Linke Cai, Ning Mao +4
The discovery of quantum spin Hall effect has ignited the field of topological physics with vast variety of exotic properties. Here, we present the emergence of doubled quantum spi…
Hidden wallpaper fermion and third-order topological insulator
Ning Mao, Hao Wang, Ying Dai +2
Nonsymmorphic symmetry can induce exotic wallpaper fermions, e.g., hourglass fermion, fourfold-degenerate Dirac fermion, and Möbius fermion, as commonly believed only in nonsymmorp…
Mixed topological semimetals driven by orbital complexity in two-dimensional ferromagnets
Chengwang Niu, Jan-Philipp Hanke, Patrick M. Buhl +6
The concepts of Weyl fermions and topological semimetals emerging in three-dimensional momentum space are extensively explored owing to the vast variety of exotic properties that t…
Quantum spin Hall effect and topological phase transitions in honeycomb antiferromagnets
C. Niu, J. -P. Hanke, P. M. Buhl +4
While the quantum spin Hall (QSH) effect and antiferromagnetic order constitute two of the most promising phenomena for embedding basic spintronic concepts into future technologies…
Topological Nodal-line Semimetals in Two Dimensions with time-reversal symmetry breaking
Chengwang Niu, Patrick M. Buh, Hongbin Zhang +4
Topological nodal-line semimetals (TNLSs) exhibit exotic physical phenomena due to a one-dimensional (1D) band touching line, rather than discrete (Dirac or Weyl) points. While so…
Two-dimensional topological nodal line semimetal in layered ( = Ca, Sr, and Ba; = As, Sb, and Bi)
Chengwang Niu, Patrick M. Buhl, Gustav Bihlmayer +4
In topological semimetals the Dirac points can form zero-dimensional and one-dimensional manifolds, as predicted for Dirac/Weyl semimetals and topological nodal line semimetals, re…
Robust Dual Topological Character with Spin-Valley Polarization in a Monolayer of the Dirac Semimetal NaBi
Chengwang Niu, Patrick M. Buhl, Gustav Bihlmayer +4
Topological materials with both insulating and semimetal phases can be protected by crystalline (e.g. mirror) symmetry. The insulating phase, called topological crystalline insulat…
Mixed Weyl semimetals and dissipationless magnetization control in insulators by spin-orbit torques
Jan-Philipp Hanke, Frank Freimuth, Chengwang Niu +2
Reliable and energy efficient magnetization switching by electrically-induced spin-orbit torques is of crucial technological relevance for spintronic devices implementing memory an…
$\mbox{Bi}_{1}\mbox{Te}_{1}$: a dual topological insulator
Markus Eschbach, Martin Lanius, Chengwang Niu +15
A combined theoretical and experimental study reveals evidence for the dual topological insulating character of the stoichiometric natural superlattice phase $\mathrm{Bi_{1}Te_{1}}…
Topological Crystalline Insulator and Quantum Anomalous Hall States in IV-VI based Monolayers and their Quantum Wells
C. Niu, P. M. Buhl, G. Bihlmayer +3
Different from the two-dimensional (2D) topological insulator, the 2D topological crystalline insulator (TCI) phase disappears when the mirror symmetry is broken, e.g., upon placin…
Two-Dimensional Inversion Asymmetric Topological Insulators in Functionalized III-Bi Bilayers
Yandong Ma, Liangzhi Kou, Binghai Yan +3
The search for inversion asymmetric topological insulators (IATIs) persists as an effect for realizing new topological phenomena. However, so for only a few IATIs have been discove…
Functionalized Bismuth Films: Giant Gap Quantum Spin Hall and Valley-Polarized Quantum Anomalous Hall States
Chengwang Niu, Gustav Bihlmayer, Hongbin Zhang +3
The search for new large band gap quantum spin Hall (QSH) and quantum anomalous Hall (QAH) insulators is critical for their realistic applications at room temperature. Here we pred…