A5048263206- Graphene research and applications
- 2D Materials and Applications
- Topological Materials and Phenomena
- Quantum and electron transport phenomena
- MXene and MAX Phase Materials
- Physics of Superconductivity and Magnetism
- Graphene and Nanomaterials Applications
- Iron-based superconductors research
- Carbon Nanotubes in Composites
- Conducting polymers and applications
- Membrane Separation Technologies
- Perovskite Materials and Applications
- Advanced Semiconductor Detectors and Materials
- Luminescence Properties of Advanced Materials
- Advanced Memory and Neural Computing
- Photocathodes and Microchannel Plates
- Advanced Sensor and Energy Harvesting Materials
- Quantum optics and atomic interactions
- Near-Field Optical Microscopy
- Calibration and Measurement Techniques
- Quantum Computing Algorithms and Architecture
- Ga2O3 and related materials
- Quantum, superfluid, helium dynamics
- Organic and Molecular Conductors Research
- Energy, Environment, Economic Growth
Nanjing University
2017-2025
Collaborative Innovation Center of Advanced Microstructures
2017-2024
Hankou University
2024
National Supercomputing Center in Wuxi
2022
University of Manchester
2013-2018
Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine
2015
Many layered materials can be cleaved down to individual atomic planes, similar graphene, but only a small minority of them are stable under ambient conditions. The rest react and decompose in air, which has severely hindered their investigation potential applications. Here we introduce remedial approach based on cleavage, transfer, alignment, encapsulation air-sensitive crystals, all inside controlled inert atmosphere. To illustrate the technology, choose two archetypal two-dimensional...
In this work, we use Raman spectroscopy as a nondestructive and rapid technique for probing the van der Waals (vdW) forces acting between two atomically thin crystals, where one is transition metal dichalcogenide (TMDC). MoS2 used probe: show that its Raman-active phonon modes can provide information on interaction crystals. particular, in-plane vibration (E2g1) provides strain, while out-of-plane mode (A1g) gives evidence quality of interfacial contact. We vdW contact with characterized by...
Abstract Microelectromechanical systems, which can be moved or rotated with nanometre precision, already find applications in such fields as radio-frequency electronics, micro-attenuators, sensors and many others. Especially interesting are those allow fine control over the motion on atomic scale because of self-alignment mechanisms forces acting level. Such machines produce well-controlled movements a reaction to small changes external parameters. Here we demonstrate that, for system...
Graphene placed on hexagonal-boron nitride (h-BN) experiences a superlattice (Moiré) potential, which leads to strong reconstruction of graphene's electronic spectrum with new Dirac points emerging at sub-eV energies. Here we study the effect such superlattices Raman spectrum. In particular, 2D peak is found be exquisitely sensitive misalignment between graphene and h-BN lattices, probably due presence strain distribution same periodicity Moiré potential. This feature can used identify angle...
It is well known that superconductivity in thin films generally suppressed with decreasing thickness. This suppression normally governed by either disorder-induced localization of Cooper pairs, weakening Coulomb screening, or generation and unbinding vortex-antivortex pairs as described the Berezinskii-Kosterlitz-Thouless (BKT) theory. Defying general expectations, few-layer NbSe2 - an archetypal example ultrathin superconductors has been found to remain superconducting down monolayer Here...
A high performance near-infrared photodetector is achieved by the graphene/GaAs Schottky junction which can be further improved coating NaYF<sub>4</sub>:Yb<sup>3+</sup>/Er<sup>3+</sup> nanoparticles.
An energy gap can be opened in the electronic spectrum of graphene by lifting its sublattice symmetry. In bilayers, it is possible to open gaps as large 0.2 eV. However, these rarely lead a highly insulating state expected for such semiconductors at low temperatures. This long-standing puzzle usually explained charge inhomogeneity. Here we investigate spatial distributions proximity-induced superconducting currents gapped and, also, compare measurements Hall bar and Corbino geometries normal...
Abstract We theoretically study the propagation and interference of plasmon polaritons in soliton superlattices minimally twisted bilayer graphene with arbitrary angle, which characterizes local strain direction. show that band structures optical conductivity across evolve systematically providing an important tunable degree freedom for tuning polariton-soliton interactions. Consequently, polariton profile near single solitons can be significantly continuously modulated through angle....
Abstract α-RuCl3 is known for its potential to realize a Kitaev quantum spin liquid by tuning&#xD;the competing interactions, such as doping effects. Here, we investigated the doping&#xD;effect of α-RuCl3/graphene heterostructures and observed G peak splitting related&#xD;to different spins, revealed Raman spectroscopy. The deliberate disruption the&#xD;heterostructure led transition from double single peak, underscoring&#xD;the significance interface quality. This...
In flat-band systems, emergent physics can be substantially modified by the presence of another nearby electronic band. For example, a Mott˘Hubbard insulator turn into charge transfer if other states enter between upper and lower Hubbard bands. Here, we introduce twisted double bilayer (TDB) WSe2, with twist angles near 60°, as controllable platform in which K-valley band tuned to close vicinity Γ-valley moiré flat At half-filling, correlations split bands charge-transfer forms Using gate...
<title>Abstract</title> For several decades, research has centered on electronic systems where an electron’s kinetic energy rivals its interaction energy. Although many have been proposed, none enable continuous tuning of key parameters, such as doping or work function. By contrast, graphene permits precise carrier density control via gating, but sample inhomogeneities hinder access to the low-density regime electron-electron interactions dominate. Improving graphene’s mobility remains...
In three-dimensional topological insulators (TIs), the nontrivial topology in their electronic bands casts a gapless state on solid surfaces, using which dissipationless TI edge devices based quantum anomalous Hall (QAH) effect and (QH) have been demonstrated. Practical present pair of parallel-transport surface states (TSSs) top bottom surfaces. However, due to no-go theorem, two TSSs always appear as are expected quantize synchronously. Quantized transport separate Dirac channel is still...
Few-layer black phosphorus was recently rediscovered as a narrow-bandgap atomically thin semiconductor and has already attracted unprecedented attention due to its interesting properties. One feature of this material that sets it apart from other crystals is structural in-plane anisotropy which manifests in strongly anisotropic transport characteristics. However, traditional angle-resolved conductance measurements present challenge for nanoscale systems such phosphorus, calling new...
Abstract Arsenene, as a member of the Group V elemental two-dimensional materials appears on horizon, has shown great prospects. However, its indirect bandgap limits applications in optoelectronics. In this theoretical work, we reported that partial oxidation can tune arsenene into direct one. Attributed to enthalpy decreasing linear oxygen ratio, oxidized be controllably produced by progressive under low temperature. Importantly, increasing content from 1O/18As 18O/18As, narrow 1.29 0.02...
Flexible strain sensors based on 2D materials have been proven effective for wearable health monitoring devices, human motion detection, and fitness applications. These are flexible, light, user-friendly, but their sensitivity detection range need to be enhanced. Among many materials, MXene attracts much interest due its remarkable properties, such as high electrical conductivity, excellent mechanical flexibility, good hydrophilicity. However, it is a challenge fabricate with extreme wide...
Abstract Dielectric microspheres naturally possess unique optical properties by which the light's focus and confinement can be manipulated on a microscale. Combining or Raman microscopy, super‐resolution imaging beyond diffraction limit enhancement of signals are demonstrated to provide abundant spectroscopic information materials. However, microsphere‐aided scanning photocurrent remains challenging date. Here, based photonic nanojet mechanism, spectral microscopy equipped with tip silica...
Reversible regulation of ferroelectric polarization possesses great potentials recently in bionic neural networks. Photoinduced cis-trans isomers have changeable dipole moments, but they cannot be directed to some specific orientation. Here, we construct a host-guest composite structure which consists porous metal (Ni)-organic framework [Ni(DPA)2] as host and photoisomer, azobenzene (AZB), guest molecules. When AZB molecules are embedded the nanopores Ni(DPA)2 form single molecule, strength...
The van der Waals Fe5–xGeTe2 is a 3d ferromagnetic metal with high Curie temperature of 275 K. We report herein the observation an exceptional weak antilocalization (WAL) effect that can persist up to 120 K in nanoflake, indicating dual nature both itinerant and localized magnetism electrons. WAL behavior characterized by magnetoconductance peak around zero magnetic field supported calculated nondispersive flat band Fermi level. dip crossover starting 60 visible, which could be ascribed...