- Physics of Superconductivity and Magnetism
- Quantum and electron transport phenomena
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Condensed Matter Physics
- Topological Materials and Phenomena
- Graphene research and applications
- Carbon Nanotubes in Composites
- Thermal Radiation and Cooling Technologies
- Mechanical and Optical Resonators
- Superconducting and THz Device Technology
- Quantum Information and Cryptography
- Pulsars and Gravitational Waves Research
- Atomic and Subatomic Physics Research
- Gamma-ray bursts and supernovae
- Quantum optics and atomic interactions
- Thermal properties of materials
- Quantum many-body systems
- Photonic and Optical Devices
- nanoparticles nucleation surface interactions
- Rare-earth and actinide compounds
- Astrophysical Phenomena and Observations
- Gold and Silver Nanoparticles Synthesis and Applications
- Magnetic and transport properties of perovskites and related materials
- Cosmology and Gravitation Theories
- Quantum Chromodynamics and Particle Interactions
Nanjing University
2018-2024
Collaborative Innovation Center of Advanced Microstructures
2018-2024
Tsinghua University
2011-2023
National Laboratory of Solid State Microstructures
2018-2019
University Town of Shenzhen
2019
Institute of Microelectronics
2016-2018
McGill University
2012-2014
University of Washington
1998-2011
State Key Laboratory of New Ceramics and Fine Processing
2010
Seattle University
2009
A seedy route: Monodisperse CuAu and Cu3Au nanocrystals (NCs) were fabricated by a seed-based diffusion route using Au NCs as precursors. This method has advantages in controlling the size monodispersity of products. Moving solid-state reaction into solution may help to achieve homogeneous require less time thermal energy.
At ambient temperatures, graphene conducts heat via lattice vibrations called phonons, but at very low electron-phonon coupling becomes weak and thermal conductance is mostly due to electron diffusion. High-sensitivity measurements across a wide temperature range provide new, state-of-the-art data on coupling, reveal intriguing deviations from theoretical predictions regarding electron-based electric transport.
We calculate the heat flux and electron-phonon thermal conductance in a disordered graphene sheet, going beyond Fermi's Golden rule approach to fully account for modification of interaction by disorder. Using Keldysh technique combined with standard impurity averaging methods regime $k_F l >> 1$ (where $k_F$ is Fermi wavevector, mean free path), we consider both scalar potential (i.e. deformation potential) vector couplings between electrons phonons. also effects electronic screening at...
Electromagnetically induced transparency (EIT) has been realized in atomic systems, but fulfilling the EIT conditions for artificial atoms made from superconducting circuits is a more difficult task. Here we report an experimental observation of tunable three-dimensional transmon by probing cavity transmission. To fulfill conditions, tune to adjust its damping rates utilizing effect on states. From observations, clearly identify and Autler-Townes splitting (ATS) regimes as well transition...
Alkaline-earth-metal atoms have a long-lived electronic excited state, and when in this state are localized the Fermi sea of ground-state by an external potential, they serve as magnetic impurities, due to spin-exchange interaction between excited- atoms. This can give rise Kondo effect. However, order achieve effect current atomic gas experiments, it requires temperature be increased sizable portion temperature. In paper we calculate confinement-induced resonance (CIR) for spin-exchanging...
We study the Kitaev model in a [001] magnetic field employing mean-field theory Majorana fermion representation. The Hamiltonian of system has Bogoliubov--de Gennes (BdG) form two-dimensional superconductor. discover robust gapless regime intermediate for both and gapped antiferromagnetic models with ${J}_{x}={J}_{y}$ before is polarized high field. A topological phase transition connecting two phases nodal line takes place at critical ${h}_{{c}_{1}}$ this regime. While disappears when...
We consider a one-dimensional optomechanical lattice where each site is strongly driven by control laser to enhance the basic interaction. then study propagation of photons injected an additional probe beam; this lattice-generalization well-known optomechanically-induced transparency (OMIT) effect in single cavity. find interesting interplay between OMIT-type physics and geometric, Fabry-Perot type resonances. In particular, phonon-like polaritons can give rise high-amplitude transmission...
We develop a Boltzmann-Langevin description of the Coulomb drag effect in clean double-layer systems with large interlayer separation $d$ as compared to average interelectron distance ${\ensuremath{\lambda}}_{F}$. arises from density fluctuations spatial scales order $d$. At low temperatures, their characteristic frequencies exceed intralayer equilibration rate electron liquid, and may be treated collisionless approximation. As temperature is raised, mean free path becomes short due...
Frisch legiert: Monodisperse intermetallische CuAu- und Cu3Au-Nanokristalle (NCs) mit einstellbarer Größe wurden ausgehend von Au-NCs nach einem Diffusionsverfahren hergestellt. Der Transfer einer Festphasenreaktion in die Lösungsphase erleichtert homogene Diffusion der Reaktanten führt zu Zeit- Energieersparnis. Detailed facts of importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available...
We study the conductance of an interconnect between two graphene leads formed by a single-atom carbon chain. Its dependence on chemical potential and number atoms in chain is qualitatively different from that case normal metal leads. Electron transport proceeds via narrow resonant states wire. The latter arise due to strong reflection at junctions leads, which caused small density low energy. energy transmission coefficient near resonance asymmetric acquires universal form energies. find...
We show that a conical magnetic field H=(1,1,1)H can be used to tune the topological order and hence, anyon excitations of Z_{2} quantum spin liquid in isotropic antiferromagnetic Kitaev model. A novel order, featured with Chern number C=4 Abelian excitations, is induced narrow range intermediate fields H_{c1}≤H≤H_{c2}. On other hand, C=1 Ising-topological non-Abelian as previously known present at small fields, found here survive up H_{c1}. The results are obtained by developing applying...
In vitro assays using reconstituted microtubules have provided molecular insights into the principles of microtubule dynamics and roles microtubule-associated proteins. Emerging questions that further uncover complexity in dynamics, especially those on tubulin isotypes post-translational modifications, raise new technical challenges how to visualize composed purified from limited sources, primarily due low efficiency conventional labeling protocol. Here, we develop a peptide probe, termed...
We study the anomalous Hall effect (AHE) in tilted Weyl metals with weak Gaussian disorder under Kubo-Streda formalism this work. To separate three different contributions, namely, intrinsic, side-jump, and skew-scattering it is usually considered necessary to go eigenstate (chiral) basis of formula. However, more straightforward compute total current spin basis. For reason, we develop a systematic transparent scheme contributions for relativistic systems by building one-to-one...
We study the anomalous Hall effect (AHE) in tilted Weyl metals with Gaussian disorder due to crossed X and {\Psi} diagrams this work. The importance of such AHE has been demonstrated recently two dimensional (2D) massive Dirac model Rashba ferromagnets. It shown that inclusion dramatically changes total systems. In work, we show contributions from are same order non-crossing diagram studied a previous but opposite sign. contribution cancels majority part metals, similar 2D model. also...
We show that strong Luttinger correlations of the electron liquid in armchair carbon nanotubes significantly enhance onset temperature putative twist Peierls instability and lead to its 1/R3 dependence on tube radius. Depending values coupling constants umklapp processes can either assist or compete with instability. In case a competition win wide tubes. narrow tubes outcome depends relative strength e-e e-ph backscattering. Our estimates may be realized freestanding (5,5)
Abstract Twisted bilayer graphene (TBG) has attracted great interest in the last decade due to novel properties it exhibited. It was revealed that e-phonon interaction plays an important role a variety of phenomena this system, such as superconductivity and exotic phases. However, its complexity, TBG is not well studied yet. In work, we study electron with acoustic phonon mode twisted one consequences, i.e., Kohn anomaly. The anomaly ordinary metals usually happens at momentum q = 2k_F...
Monolayer ${\mathrm{FeTe}}_{1\ensuremath{-}x}{\mathrm{Se}}_{x}$ films grown on a ${\mathrm{SrTiO}}_{3}(001)$ substrate is promising platform to explore both high-temperature and topological superconductivity. Using molecular beam epitaxy, we successfully synthesized monolayer ($0\ensuremath{\le}x\ensuremath{\le}1$) $\mathrm{Nb}$-doped substrate. The as-grown with $0.30\ensuremath{\le}x\ensuremath{\le}1$ show By spatially mapping the superconducting gap distribution, found large variation of...
We evaluate the rate of energy loss a plasmon in disorder-free carbon nanotube. The decays into neutral bosonic excitations electron liquid. process is mediated either by phonon-assisted backscattering single or Umklapp two electrons. To lowest order interactions, partial decay rates are additive. At zero doping, corresponding scale as power laws temperature with positive and negative exponents for mechanisms, respectively. precise values depend on Luttinger-liquid parameter. finite...
The storage potential of selected sites within the Bahaiwan Basin was evaluated, capacity estimated and selection criteria considered for COACH project. This paper examines two methods used during project calculation in Shengli oilfield complex Basin. Both methodologies were to quantify CO2 depleted oil hydrocarbon reservoirs complex. They can both be as "simple" equation models which try capture an "approximation" a possible capacity. Nevertheless, between these several differences exist....
We study the response of Kitaev spin liquid (KSL) to a local magnetic field perpendicular honeycomb lattice. The induces dynamical excitation flux pair in and system can be described by generally particle-hole asymmetric interacting resonant level model. closes gap spectrum correlation function locally for gapless KSL even from perturbative weak field. Beyond regime, p-h asymmetry competes with results rich phase diagram. Moreover, breaks gauge equivalence ferromagnetic anti-ferromagnetic...
Phonon-induced anomalous Hall or thermal effects have been observed in various systems recent experiments. However, the theoretical studies on this subject are still incomplete and not unified, current works mainly focus semiclassical Boltzmann equation approach. In work, we present a systematic fundamental quantum field theory study phonon-induced effect, including both side jump skew scattering contributions, two-dimensional massive Dirac metal, which is considered as minimum system. We...
Within the method of parity-projected QCD sum rules, we study mass spectra light hybrid baryons with $I(J^{P})=1/2(1/2^{\pm}), 3/2(1/2^{\pm}), 1/2(3/2^{\pm}), 3/2(3/2^{\pm})$ by constructing local $qqqg$ interpolating currents. We calculate correlation functions up to dimension eight condensates at leading order $\alpha_{s}$. The stable Lapalce rules can be established for positive-parity $N_{1/2^+}, \Delta_{3/2^+}, \Delta_{1/2^+}$ and negative-parity $N_{1/2^-}, N_{3/2^-}, \Delta_{1/2^-}$...