A5013246065- Quantum and electron transport phenomena
- Topological Materials and Phenomena
- Physics of Superconductivity and Magnetism
- Cold Atom Physics and Bose-Einstein Condensates
- Metamaterials and Metasurfaces Applications
- Graphene research and applications
- Plasmonic and Surface Plasmon Research
- Quantum many-body systems
- 2D Materials and Applications
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Thermal Radiation and Cooling Technologies
- Quantum, superfluid, helium dynamics
- Particle physics theoretical and experimental studies
- Calibration and Measurement Techniques
- Advanced Fiber Optic Sensors
- MXene and MAX Phase Materials
- Advanced Photocatalysis Techniques
- Perovskite Materials and Applications
Hefei University of Technology
2020-2024
University of Science and Technology of China
2019
Nanjing University
2016-2018
Institute of Acoustics
2017
Collaborative Innovation Center of Advanced Microstructures
2017
Strong near-infrared absorption of light in semiconducting transition metal dichalcogenides (TMDs) is essential for improving the photocarrier extraction efficiency optoelectronic devices. Here, we numerically demonstrate that an original TMD Huygens metasurface specifically designed to overcome 50% absorptance limit a subwavelength thin film. The unique comprising nanodisk array shows evidence characteristic Mie resonances including electric and magnetic dipoles. By carefully optimizing...
Coherent absorption, as the time-reversed counterpart to laser, has been widely proposed recently flexibly modulate light-matter interactions in two-dimensional materials. However, multiband coherent perfect absorption (CPA) atomically thin materials still elusive. We exploit CPA vertically stacked metal/dielectric/graphene heterostructures via ultraconfined acoustic plasmons which can reduce photon wavelength by a factor of about 70 and thus enable multiple-order resonances on graphene...
Designing two-dimensional (2D) ferromagnetic (FM) semiconductors with elevated Curie temperature, high carrier mobility, and strong light harvesting is challenging but crucial to the development of spintronics multifunctionalities. Herein, we show first-principles computation evidence 2D metal–organic framework Kagome ferromagnet Cr3(CN3)2. Monolayer Cr3(CN3)2 predicted be an FM semiconductor a record-high temperature 943 K owing use single-atom linker (N), which results in direct d–p...
According to the extensive theoretical and experimental investigations, it is widely accepted that long-range Coulomb interaction too weak generate a dynamical excitonic gap in graphene with perfect Dirac cone. We study impact of deformation cone on generation. When uniaxial strain applied graphene, made elliptical equal-energy plane fermion velocity becomes anisotropic. The has two effects: decreases velocity; increases anisotropy. After solving Dyson-Schwinger equation, we show generation...
We investigate the nonequilibrium dynamics of two multiband boundary-obstructed topological systems (BOTSs) and a higher-order superconductor (HOTSC). The singular behavior exhibited by dynamical free energy indicates presence quantum phase transitions (DQPTs) within these systems. By studying in BOTS featuring even-parity Cooper pairing, we find that there are DQPTs this via quenching from different regions. analysis spectra shows previously considered identical phases actually different....
We present a general ab initio method based on Wannier functions using the covariant derivative for simulating photocurrent in solids. The is widely applicable to charge/spin dc and ac at any perturbation levels both semiconductors metals linearly circularly polarized light. This because theoretically complete (within relaxation-time approximation), that say, it includes all intraband, interband, their cross terms. Specifically second-order photocurrent, of following contributions---shift...
We study the excitonic semimetal-insulator quantum phase transition in three-dimensional Dirac semimetal which fermion dispersion is strongly anisotropic. After solving Dyson-Schwinger equation for gap, we obtain a global diagram plane spanned by parameter Coulomb interaction strength and velocity anisotropy. find that gap generation promoted as becomes stronger, but suppressed if anisotropy increases. Applying our results to two realistic semimetals Na$_{3}$Bi Cd$_{3}$As$_{2}$, establish...
In a realistic interacting system described by ($2+1$)-dimensional quantum electrodynamics (${\mathrm{QED}}_{3}$), there is always certain number of impurities which fermions are scattered. general, impurity scattering can generate finite density states at the Fermi level, screens temporal component gauge field. This effect expected to weaken dynamical fermion mass generation. Within Born approximation, introducing damping term in energy propagator, influences temperature and on chiral phase...
We present a general \textit{ab initio} method based on Wannier function for simulating the photocurrent in solids. The is widely applicable to charge/spin DC and AC at any perturbation levels both semiconductors metals linearly circularly polarized light. This because theoretically complete (within relaxation time approximation), that say, it includes all intra-band, inter-band their cross terms. Specifically second-order photocurrent, of following contributions - shift current, (magnetic)...
Phonon vibration excitation is an effective approach to enhance photoelectric conversion efficiency of $g\text{\ensuremath{-}}{\mathrm{C}}_{3}{\mathrm{N}}_{4}$-based heterostructures, yet the influencing mechanism on interlayer transfer photogenerated charges remains unclear. Herein, we show first-principles evidence using $g\text{\ensuremath{-}}{\mathrm{C}}_{3}{\mathrm{N}}_{4}/$ transition metal dichalcogenide ($\mathrm{MoT}{\mathrm{e}}_{2}$ and $\mathrm{WT}{\mathrm{e}}_{2}$)...
In the framework of Dyson–Schwinger equations, we employ two kinds criteria (one kind is chiral condensate, other thermodynamic quantities, such as pressure, entropy, and specific heat) to investigate nature phase transitions in QED 3 for different fermion flavors. It found that flavors are all typical second-order transitions; critical temperature order transition obtained from condensate susceptibility same with by which means they equivalent describing transition; decreases number...
Two-dimensional Dirac fermions are subjected to two types of interactions, namely, the long-range Coulomb interaction and short-range on-site interaction. The former induces excitonic pairing if its strength $\ensuremath{\alpha}$ is larger than some critical value ${\ensuremath{\alpha}}_{c}$, whereas latter drives an antiferromagnetic Mott transition when $U$ exceeds a threshold ${U}_{c}$. Here, we study impacts interplay these interactions on with Dyson-Schwinger equation approach. We find...
We investigate the dual-band perfect absorption and their hybridization on multilayer tungsten disulfide (WS2) gratings with metallic substrates by finite-difference time-domain method coupled-mode theory. Numerical results suggest that, under illumination of transverse magnetic polarized plane wave, special WS2 grating high refractive index not only allows circulating-current-drove resonance but also provides additional wavevectors to excite plasmonic substrate surface simultaneously....
In this paper, we investigate dynamical mass generation in (2+1)-dimensional quantum electrodynamics at finite temperature. Many studies are carried out within the instantaneous-exchange approximation, which ignores all but zero-frequency component of boson propagator and fermion self-energy function. We extend these by taking retardation effects into consideration. get explicit frequency n momentum p dependence function identify critical temperature for different flavors chiral limit. Also,...