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Direct visualization of the charge transfer in Graphene/-RuCl heterostructure
Antonio Rossi, Riccardo Dettori, Cameron Johnson +13
We investigate the electronic properties of a graphene and -ruthenium trichloride (hereafter RuCl) heterostructure, using a combination of experimental and theoretical techn…
The sample-dependent and sample-independent thermal transport properties of -RuCl
Heda Zhang, Andrew May, Hu Miao +5
We investigated the thermal transport properties of two -RuCl crystals with different degrees of stacking disorder to understand the origin of the previously reported oscill…
Stacking disorder and thermal transport properties of -RuCl
Heda Zhang, Michael A McGuire, Andrew F May +9
-RuCl, a well-known candidate material for Kitaev quantum spin liquid, is prone to stacking disorder due to the weak van der Waals bonding between the honeycomb layers. Afte…
Anomalous magneto-thermoelectric behavior in massive Dirac materials
Yanan Li, Huichao Wang, Jingyue Wang +15
Extensive studies of electron transport in Dirac materials have shown positive magneto-resistance (MR) and positive magneto-thermopower (MTP) in a magnetic field perpendicular to t…
Discrete scale invariance of the quasi-bound states at atomic vacancies in a topological material
Zhibin Shao, Shaojian Li, Yanzhao Liu +10
Recently, log-periodic quantum oscillations have been detected in topological materials zirconium pentatelluride (ZrTe5) and hafnium pentatelluride (HfTe5), displaying intriguing d…
Observation of giant surface second harmonic generation coupled to nematic orders in the van der Waals antiferromagnet FePS
Zhuoliang Ni, Nan Huang, Amanda V. Haglund +2
Second harmonic generation has been applied to study lattice, electronic and magnetic proprieties in atomically thin materials. However, inversion symmetry breaking is usually requ…
Direct STM Measurements of R- and H-type Twisted MoSe2/WSe2 Heterostructures
Rachel Nieken, Anna Roche, Fateme Mahdikhanysarvejahany +6
When semiconducting transition metal dichalcogenides heterostructures are stacked the twist angle and lattice mismatch leads to a periodic moiré potential. As the angle between the…
Disentangling Electronic, Lattice and Spin Dynamics in the Chiral Helimagnet Cr1/3NbS2
N. Sirica, H. Hedayat, D. Bugini +7
We investigate the static and ultrafast magneto-optical response of the hexagonal chiral helimagnet above and below the helimagnetic ordering temperature. The pre…
Direct imaging of antiferromagnetic domains and anomalous layer-dependent mirror symmetry breaking in atomically thin MnPS
Zhuoliang Ni, Huiqin Zhang, David Hopper +8
We have developed a sensitive cryogenic second-harmonic generation microscopy to study a van der Waals antiferromagnet MnPS. We find that long-range Néel antiferromagnetic orde…
Electron-beam induced emergence of mesoscopic ordering in layered MnPS
Kevin M. Roccapriore, Nan Huang, Mark P. Oxley +8
Ordered mesoscale structures in 2D materials induced by small misorientations have opened pathways for a wide variety of novel electronic, ferroelectric, and quantum phenomena. Unt…
Imaging the Néel vector switching in the monolayer antiferromagnet MnPSe with strain-controlled Ising order
Zhuoliang Ni, A. V. Haglund, H. Wang +7
The family of monolayer two-dimensional (2D) materials hosts a wide range of interesting phenomena, including superconductivity, charge density waves, topological states and ferrom…
Revealing the chemical bonding in adatoms arrays via machine learning of 3D scanning tunneling spectroscopy data
Kevin M. Roccapriore, Qiang Zou, Lizhi Zhang +9
The adatom arrays on surfaces offer an ideal playground to explore the mechanisms of chemical bonding via changes in the local electronic tunneling spectra. While this information…
Bayesian learning of adatom interactions from atomically-resolved imaging data
Mani Valleti, Qiang Zou, Rui Xue +8
Atomic structures and adatom geometries of surfaces encode information about the thermodynamics and kinetics of the processes that lead to their formation, and which can be capture…
Induced anomalous Hall effect of massive Dirac fermions in ZrTe5 and HfTe5 thin flakes
Yanzhao Liu, Huichao Wang, Huixia Fu +8
Researches on anomalous Hall effect (AHE) have been lasting for a century to make clear the underlying physical mechanism. Generally, the AHE appears in magnetic materials, in whic…
Tunable discrete scale invariance in transition-metal pentatelluride flakes
Yanzhao Liu, Huichao Wang, Haipeng Zhu +9
Log-periodic quantum oscillations discovered in transition-metal pentatelluride give a clear demonstration of discrete scale invariance (DSI) in solid-state materials. The peculiar…
The nature of ferromagnetism in the chiral helimagnet
N. Sirica, P. Vilmercati, F. Bondino +12
The chiral helimagnet, , hosts exotic spin textures, whose influence on the magneto-transport properties, make this material an ideal candidate for future spintron…
Graphene/-RuCl: An Emergent 2D Plasmonic Interface
Daniel J. Rizzo, Bjarke S. Jessen, Zhiyuan Sun +16
Work function-mediated charge transfer in graphene/-RuCl heterostructures has been proposed as a strategy for generating highly-doped 2D interfaces. In this geometry, graphe…
Canted antiferromagnetic order in the monoaxial chiral magnets VTaS and VNbS
Kannan Lu, Deepak Sapkota, Lisa DeBeer-Schmitt +6
The Dzyaloshinskii-Moriya (DM) interaction is present in the transition metal dichalcogenides (TMDC) magnets of form S ( 3d transition metal, {Nb,…
Anisotropic susceptibilities in the honeycomb Kitaev system -RuCl
P. Lampen-Kelley, S. Rachel, J. Reuther +6
The magnetic insulator -RuCl is a promising candidate to realize Kitaev interactions on a quasi-2D honeycomb lattice. We perform extensive susceptibility measurements on s…
Magnetism out of disorder in a J=0 compound Ba2YIrO6
Q. Chen, C. Svoboda, Q. Zheng +8
We systematically investigate the magnetic properties and local structure of Ba2YIrO6 to demonstrate that Y and Ir lattice defects in the form of antiphase boundary or clusters of…
Excitations in the field-induced quantum spin liquid state of alpha-RuCl3
A. Banerjee, P. Lampen-Kelley, J. Knolle +14
The Kitaev model on a honeycomb lattice predicts a paradigmatic quantum spin liquid (QSL) exhibiting Majorana Fermion excitations. The insight that Kitaev physics might be realized…
Discovery of Log-Periodic Oscillations in Ultra-Quantum Topological Materials
Huichao Wang, Haiwen Liu, Yanan Li +10
Quantum oscillations are usually the manifestation of the underlying physical nature in condensed matter systems. Here we report a new type of log-periodic quantum oscillations in…
Unusual Exciton-Phonon Interactions at van der Waals Engineered Interfaces
Colin M. Chow, Hongyi Yu, Aaron M. Jones +6
Raman scattering is a ubiquitous phenomenon in light-matter interactions which reveals a material's electronic, structural and thermal properties. Controlling this process would en…
Bipolar Conduction is the Origin of the Electronic Transition in Pentatellurides: Metallic vs. Semiconducting Behavior
P. Shahi, D. J. Singh, J. P. Sun +5
The pentatellurides, ZrTe5 and HfTe5 are layered compounds with one dimensional transition-metal chains that show a never understood temperature dependent transition in transport p…