Publications (53)
Bichromatic Moiré Superlattices for Tunable Quadrupolar Trions and Correlated States
Mingfeng Chen, Runtong Li, Haonan Wang +11
Moiré superlattices in transition metal dichalcogenide heterostructures provide a platform to engineer many-body interactions. Here, we realize a bichromatic moiré superlattice i…
Charge ordering and ferrimagnetism in the strongly correlated -VPO single crystal
Jie Xing, Huibo Cao, Arpita Paul +8
A combined study of transport, thermodynamic, neutron diffraction, nuclear magnetic resonance measurements and first principles calculation were performed for -VPO sing…
Optical Control of Integer and Fractional Chern Insulators
William Holtzmann, Weijie Li, Eric Anderson +9
Optical control of topology, particularly in the presence of electron correlations, is a fascinating topic with broad scientific and technological impact. Twisted MoTe bilayer…
Visualizing Field-free Deterministic Magnetic Switching of all-van der Waals Spin-Orbit Torque System Using Spin Ensembles in Hexagonal Boron Nitride
Xi Zhang, Jingcheng Zhou, Chaowei Hu +19
Recently, optically active spin defects embedded in van der Waals (vdW) crystals have emerged as a transformative quantum sensing platform to explore cutting-edge materials science…
Quantum Imaging of Magnetic Phase Transitions and Spin Fluctuations in Intrinsic Magnetic Topological Nanoflakes
Nathan J. McLaughlin, Chaowei Hu, Mengqi Huang +6
Topological materials featuring exotic band structures, unconventional current flow patterns, and emergent organizing principles offer attractive platforms for the development of n…
A van der Waals antiferromagnetic topological insulator with weak interlayer magnetic coupling
Chaowei Hu, Xiaoqing Zhou, Pengfei Liu +11
Magnetic topological insulators (TI) provide an important material platform to explore quantum phenomena such as quantized anomalous Hall (QAH) effect and Majorana modes, etc. Thei…
Multiple closely spaced transitions and multi-band Hall response in clean ScVSn
Jonathan M. DeStefano, Elliott Rosenberg, Chaowei Hu +2
The kagome metal ScVSn has attracted attention as a platform for exploring the interplay between charge density wave (CDW) order and symmetry-breaking phenomena, including…
An antiferromagnetic diode effect in even-layered MnBi2Te4
Anyuan Gao, Shao-Wen Chen, Barun Ghosh +26
In a PN junction, the separation between positive and negative charges leads to diode transport. In the past few years, the intrinsic diode transport in noncentrosymmetric polar co…
Purcell enhancement of photogalvanic currents in a van der Waals plasmonic self-cavity
Xinyu Li, Jesse Hagelstein, Gunda Kipp +23
Cavities provide a means to manipulate the optical and electronic responses of quantum materials by selectively enhancing light-matter interaction at specific frequencies and momen…
Visualizing the microscopic origins of topology in twisted molybdenum ditelluride
Ellis Thompson, Keng Tou Chu, Florie Mesple +14
In moiré materials with flat electronic bands and suitable quantum geometry, strong correlations can give rise to novel topological states of matter. The nontrivial band topology…
Observation of Fractionally Quantized Anomalous Hall Effect
Heonjoon Park, Jiaqi Cai, Eric Anderson +17
The integer quantum anomalous Hall (QAH) effect is a lattice analog of the quantum Hall effect at zero magnetic field. This striking transport phenomenon occurs in electronic syste…
Record magnetoresistance, enhanced superconductivity, and fermiology in WTe2
Gianluca Delgado, Elliott Runburg, Chaowei Hu +12
The diverse electronic properties of transition metal chalcogenides can be very sensitive to crystal imperfections. A new crystal growth technique, known as horizontal flux transpo…
Nonperturbative Nonlinear Transport in a Floquet-Weyl Semimetal
Matthew W. Day, Kateryna Kusyak, Felix Sturm +23
Periodic laser driving, known as Floquet engineering, is a powerful tool to manipulate the properties of quantum materials. Using circularly polarized light, artificial magnetic fi…
Crystal and magnetic structures of magnetic topological insulators MnBiTe and MnBiTe
Lei Ding, Chaowei Hu, Feng Ye +3
Using single crystal neutron diffraction, we present a systematic investigation of the crystal structure and magnetism of van der Waals topological insulators MnBiTe and Mn…
Unconventional pressure-driven metamagnetic transitions in topological van der Waals magnets
Tiema Qian, Eve Emmanouilidou, Chaowei Hu +3
Activating metamagnetic transitions between ordered states in van der Waals magnets and devices bring great opportunities in spintronics. We show that external pressure, which enha…
Magnetic dilution effect and topological phase transitions in (MnPb)BiTe
Tiema Qian, Yueh-Ting Yao, Chaowei Hu +5
As the first intrinsic antiferromagnetic (AFM) topological insulator (TI), MnBiTe has provided a material platform to realize various emergent phenomena arising from the in…
Single crystal growth, chemical defects, magnetic and transport properties of antiferromagnetic topological insulators (GeMn)BiTe (, )
Tiema Qian, Chaowei Hu, Jazmine C. Green +3
Magnetic topological insulators provide a platform for emergent phenomena arising from the interplay between magnetism and band topology. Here we report the single crystal growth,…
Gapless surface Dirac cone in antiferromagnetic topological insulator MnBiTe
Yu-Jie Hao, Pengfei Liu, Yue Feng +18
The recent discovered antiferromagnetic topological insulators in Mn-Bi-Te family with intrinsic magnetic ordering have rapidly drawn broad interest since its cleaved surface state…
Ferromagnetism and Topology of the Higher Flat Band in a Fractional Chern Insulator
Heonjoon Park, Jiaqi Cai, Eric Anderson +18
The recent observation of the fractional quantum anomalous Hall effect in moiré fractional Chern insulators provides an opportunity to investigate zero magnetic field anyons. To p…
Axion optical induction of antiferromagnetic order
Jian-Xiang Qiu, Christian Tzschaschel, Junyeong Ahn +25
Using circularly-polarized light to control quantum matter is a highly intriguing topic in physics, chemistry and biology. Previous studies have demonstrated helicity-dependent opt…
A Néel-type antiferromagnetic order in the spin 1/2 rare-earth honeycomb YbCl
Jie Xing, Erxi Feng, Yaohua Liu +8
Most of the searches for Kitaev materials deal with magnets with spin-orbit-coupled local moments such as iridates and -RuCl. Here we propose the monoclin…
Strongly Gapped Topological Surface States on Protected Surfaces of Antiferromagnetic MnBiTe and MnBiTe
Kyle N. Gordon, Hongyi Sun, Chaowei Hu +8
The search for materials to support the Quantum Anomalous Hall Effect (QAHE) have recently centered on intrinsic magnetic topological insulators (MTIs) including MnBiTe or…
Dichotomy of flat bands in the van der Waals ferromagnet FeGeTe
Han Wu, Jianwei Huang, Chaowei Hu +28
Quantum materials with bands of narrow bandwidth near the Fermi level represent a promising platform for exploring a diverse range of fascinating physical phenomena, as the high de…
Growth, characterization and Chern insulator state in MnBiTe via the chemical vapor transport method
Chaowei Hu, Anyuan Gao, Bryan Stephen Berggren +7
As the first intrinsic antiferromagnetic topological insulator, MnBiTe has provided a platform to investigate the interplay of band topology and magnetism as well as the em…
Magnetic order induces symmetry breaking in the single crystalline orthorhombic CuMnAs semimetal
Eve Emmanouilidou, Huibo Cao, Peizhe Tang +7
Recently, orthorhombic CuMnAs has been proposed to be a magnetic material where topological fermions exist around the Fermi level. Here we report the magnetic structure of the orth…
Notes on remanent magnetization measurements in superconductors and hard ferromagnets
Sergey L. Bud'ko, Mingyu Xu, Weiwei Xie +3
Data on zero applied field measurements of remanent magnetization and magnetic relaxation in a BCS superconductor LuNi2B2C and several hard ferromagnets are presented and compared.…
Revealing the competition between charge-density wave and superconductivity in CsVSb through uniaxial strain
Tiema Qian, Morten H. Christensen, Chaowei Hu +5
In this paper we report the impact of uniaxial strain applied along the crystalline axis on the newly discovered kagome superconductor CsVSb. At ambient c…
Ferroaxial and nematic transitions in the charge density wave phase of 1T-TiSe
Sarah Edwards, Elliott Rosenberg, Ilaria Maccari +9
Charge density waves (CDWs) with multi-component order parameters can break unexpected symmetries through the interplay of nearly degenerate instabilities. In the widely investigat…
Spectral Evidence for Local-Moment Ferromagnetism in van der Waals Metals FeGaTe and FeGeTe
Han Wu, Chaowei Hu, Yaofeng Xie +26
Magnetism in two-dimensional (2D) materials has attracted considerable attention recently for both fundamental understanding of magnetism and their tunability towards device applic…
Absence of nematic instability and dominant response in the kagome metal CsVSb
Zhaoyu Liu, Yue Shi, Qianni Jiang +12
Ever since the discovery of the charge density wave (CDW) transition in the kagome metal CsVSb, the nature of its symmetry breaking is under intense debate. While evidence…
Layer Hall effect in a 2D topological Axion antiferromagnet
Anyuan Gao, Yu-Fei Liu, Chaowei Hu +33
While ferromagnets have been known and exploited for millennia, antiferromagnets (AFMs) were only discovered in the 1930s. The elusive nature indicates AFMs' unique properties: At…
Universal Magnetic Phases in Twisted Bilayer MoTe
Weijie Li, Evgeny Redekop, Christiano Wang Beach +15
Twisted bilayer MoTe (tMoTe) has emerged as a robust platform for exploring correlated topological phases, notably supporting fractional Chern insulator (FCI) states at zer…
Unusual dynamic susceptibility arising from soft ferromagnetic domains in MnBi8Te13 and Sb-doped MnBi2nTe3n+1 (n=2, 3)
Chaowei Hu, Makariy A. Tanatar, Ruslan Prozorov +1
MnBi2nTe3n+1(MBT) is the first intrinsic magnetic topological insulator and is promising to hostemergent phenomena such as quantum anomalous Hall effect. They can be made ferromagn…
Superfluid Onset and Compressibility of He Films Adsorbed on Carbon Nanotubes
Emin Menachekanian, Vito Iaia, Mingyu Fan +7
Third sound measurements of superfluid He thin films adsorbed on 10 nm diameter multiwall carbon nanotubes are used to probe the superfluid onset temperature as a function of t…
Fragile 3D Order in VMoO
Matthew A. Davenport, Matthew J. Krogstad, Logan M. Whitt +6
The metal-to-insulator transition (MIT) in rutile VO has proven uniquely difficult to characterize because of the complex interplay between electron correlations and atomic str…
Quantum metric nonlinear Hall effect in a topological antiferromagnetic heterostructure
Anyuan Gao, Yu-Fei Liu, Jian-Xiang Qiu +28
Quantum geometry - the geometry of electron Bloch wavefunctions - is central to modern condensed matter physics. Due to the quantum nature, quantum geometry has two parts, the real…
Observation of High-Temperature Dissipationless Fractional Chern Insulator
Heonjoon Park, Weijie Li, Chaowei Hu +13
The fractional quantum anomalous Hall effect has recently been experimentally observed in zero-field fractional Chern insulators (FCI). However, an outstanding challenge is the pre…
Engineering robust strain transmission in van der Waals heterostructure devices
John Cenker, Jordan Fonseca, Mai Nguyen +8
Atomically thin van der Waals materials provide a highly tunable platform for exploring emergent quantum phenomena in solid state systems. Due to their remarkable mechanical streng…
Absence of Weyl nodes in EuCdAs revealed by the carrier density dependence of the anomalous Hall effect
Yue Shi, Zhaoyu Liu, Logan A. Burnett +8
The antiferromagnetic layered compound EuCdAs is widely considered as a leading candidate of ideal Weyl semimetal, featuring a single pair of Weyl nodes in its field-induce…
Electrically Programmable Correlated Topology and Magnetism in a Moiré Trilayer
Christiano Wang Beach, Courtney Baier, Kaijie Yang +15
Strong electron-electron interactions underlie a wide range of quantum many-body phenomena, including magnetism, superconductivity, and charge fractionalization. A central goal is…
Reversible Non-Volatile Electronic Switching in a Near Room Temperature van der Waals Ferromagnet
Han Wu, Lei Chen, Paul Malinowski +37
The ability to reversibly toggle between two distinct states in a non-volatile method is important for information storage applications. Such devices have been realized for phase-c…
Pressure tuning of structural and magnetic transitions in EuAgAs
Sergey L. Bud'ko, Li Xiang, Chaowei Hu +3
We report temperature dependent measurements of ambient pressure specific heat, magnetic susceptibility, anisotropic resistivity and thermal expansion as well as in-plane resistivi…
Fermiology and transport properties of the proposed topological crystalline insulator SrAg4Sb2
J Green, Eve Emmanouilidou, Harry W. T. Morgan +5
Compared to time-reversal symmetry-protected Z2 topological insulators and Dirac/Weyl semimetals, there are significantly fewer candidates for topological crystalline insulators. S…
Comprehensive Anisotropic Linear Optical Properties of Weyl Semimetals, TaAs and NbAs
Rui Zu, Mingqiang Gu, Lujin Min +5
TaAs and NbAs are two of the earliest identified Weyl semimetals that possess many intriguing optical properties, such as chirality-dependent optical excitations and giant second h…
Local probe of bulk and edge states in a fractional Chern insulator
Zhurun Ji, Heonjoon Park, Mark E. Barber +6
Fractional quantum Hall effect (FQHE) is a prime example of topological quantum many-body phenomena, arising from the interplay between strong electron correlation, topological ord…
Structural distortion and incommensurate noncollinear magnetism in EuAg4As2
Bing Shen, Chaowei Hu, Huibo Cao +4
Layered pnictide materials have provided a fruitful platform to study various emergent phenomena, including superconductivity, magnetism, charge density waves, etc. Here we report…
Magnetic Signatures of a Putative Fractional Topological Insulator in Twisted MoTe2
Yiping Wang, Gillian E. Minarik, Weijie Li +15
The interplay among electronic correlation, topology, and time-reversal-symmetry (TRS) often leads to exotic quantum states of matter, as highlighted by the discoveries of fraction…
Quantum Oscillations Measurement of the Heavy Electron Mass near the van Hove Singularity in a Kagome Metal
Elliott Rosenberg, Jonathan DeStefano, Yongbin Lee +6
Kagome metals with the Fermi energy tuned near the van Hove singularities (vHss) have shown to host exotic phases including unconventional superconductivity and a chiral flux phase…
Neutron diffraction study of magnetism in van der Waals layered MnBiTe
Lei Ding, Chaowei Hu, Erxi Feng +6
Two-dimensional van der Waals MnBiTe (n = 1, 2, 3, 4) compounds have been recently found to be intrinsic magnetic topological insulators rendering quantum anomalous…
Interaction-driven flat band and charge order in Fe5GeTe2
Qiang Gao, Gabriele Berruto, Khanh Duy Nguyen +9
Flat electronic bands enable fascinating emergent phenomena such as superconductivity and charge orders. A prevailing approach to realizing flat bands is to engineer lattice geomet…
Realization of an intrinsic, ferromagnetic topological state in MnBi8Te13
Chaowei Hu, Lei Ding, Kyle N. Gordon +18
The interplay between topology and magnetism is essential for realizing novel topological states including the axion insulator, the magnetic Weyl semimetal, etc. An intrinsically f…
Phonon modes and Raman signatures of MnBi2nTe3n+1 (n=1,2,3,4) magnetic topological heterostructures
Yujin Cho, Jin Ho Kang, Liangbo Liang +8
An intrinsic antiferromagnetic topological insulator can be realized by intercalating Mn-Te bilayer chain in a topological insulator, . $\m…
Tuning the magnetism and band topology through antisite defects in Sb doped MnBi4Te7
Chaowei Hu, Shang-Wei Lien, Erxi Feng +6
The fine control of magnetism and electronic structure is crucial since the interplay between magnetism and band topology can lead to various novel magnetic topological states incl…