A5084617527- Iron-based superconductors research
- Physics of Superconductivity and Magnetism
- Electronic and Structural Properties of Oxides
- Magnetic and transport properties of perovskites and related materials
- Surface and Thin Film Phenomena
- Rare-earth and actinide compounds
- Corporate Taxation and Avoidance
- Superconductivity in MgB2 and Alloys
- Advanced Condensed Matter Physics
- Advancements in Battery Materials
- Semiconductor materials and interfaces
- Transition Metal Oxide Nanomaterials
- Semiconductor materials and devices
- Thin-Film Transistor Technologies
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Fluid Dynamics and Heat Transfer
- Microplastics and Plastic Pollution
- Coal Combustion and Slurry Processing
- Pulsars and Gravitational Waves Research
- Organic and Molecular Conductors Research
- Fluid Dynamics and Mixing
- Particle Dynamics in Fluid Flows
- Effects and risks of endocrine disrupting chemicals
Shanghai Ocean University
2025
Southern University of Science and Technology
2022-2024
Chinese Academy of Sciences
2015-2024
Tsinghua University
1998-2023
Institute of Physics
2017-2023
National Laboratory for Superconductivity
2023
University of Chinese Academy of Sciences
2018-2021
National Astronomical Observatories
2015
University of Science and Technology of China
2008
We introduce the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) stellar parameter pipeline at Peking University – lsp3, developed and implemented for determinations of radial velocity Vr atmospheric parameters (effective temperature Teff, surface gravity log g, metallicity [Fe/H]) LAMOST Survey Galactic Anticentre (LSS-GAC). describe algorithms lsp3 examine accuracy yielded by it. The precision are investigated comparing results multi-epoch observations candidate members...
The origin of the linear-in-temperature (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mi>T</a:mi></a:math>-linear) resistivity in cuprate superconductors remains a profound mystery condensed matter physics. Here, we investigate dependence <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mi>T</b:mi></b:math>-linear coefficient on doping, i.e., <c:math...
The interfacial FeSe/TiO
Pelton turbine, which applied to the high water head and small flow rate, is widely used in mountainous area. During operation period sediment contained does not only induce abrasion of buckets, but also leads erosion at nozzle may damage needle structure. The structure are mainly form quality cylindrical jet increase efficiency energy exchange runner most. Thus will lead deformation jet, then cause loss cavitation. favourable prediction characteristic can effectively guide optimization...
Beyond conventional ferromagnetism and antiferromagnetism, altermagnetism is a recently discovered unconventional magnetic phase characterized by time-reversal symmetry breaking spin-split band structures in materials with zero net magnetization. This distinct not only enriches the understanding of fundamental physical concepts but also has profound impacts on condense-matter physics research practical device applications. Spin-polarized have been observed semiconductors MnTe MnTe2 vanishing...
Superconductivity transition temperature (
Among hundreds of spinel oxides, LiTi2O4 (LTO) is the only one that exhibits superconductivity (Tc ~13 K). Although general electron-phonon coupling still main mechanism for electron pairing in LTO, unconventional behaviors such as anomalous magnetoresistance, anisotropic orbital/spin susceptibilities, etc. reveal both spin and orbital interactions should also be considered understanding superconductivity. Here, we investigate tunneling spectra [111]-, [110]- [001]-oriented high quality LTO...
Critical current density (Jc) is one of the major limiting factors for high field applications iron-based superconductors. Here, we report that Mn-ions are successfully incorporated into nontoxic superconducting (Li,Fe)OHFeSe films. Remarkably, Jc significantly enhanced from 0.03 to 0.32 MA/cm^2 under 33 T, and vortex pinning force monotonically increases up 106 GN/m^3, which highest record so far among all Our results demonstrate Mn incorporation an effective method optimize performance...
The discovery of high-mobility two-dimensional electron gas and low carrier density superconductivity in multiple SrTiO$_3$-based heterostructures has stimulated intense interest the surface properties SrTiO$_3$. recent high-T$_c$ monolayer FeSe/SrTiO$_3$ aroused upsurge underscored atomic precision probe structure. By performing atomically resolved cryogenic scanning tunneling microscopy/spectroscopy characterization on dual-TiO$_{2}$-${\delta}$-terminated SrTiO$_3$(001) surfaces with...
The discovery of high-mobility two-dimensional electron gas and low carrier density superconductivity in multiple SrTiO3-based heterostructures has stimulated intense interest the surface properties SrTiO3. recent high-Tc monolayer FeSe/SrTiO3 led to upsurge underscored atomic precision probe structure. By performing atomically resolved cryogenic scanning tunneling microscopy/spectroscopy characterization on dual-TiO2−δ-terminated SrTiO3(001) surfaces with (√13 × √13), c(4 2), mixed (2 1),...
High-field electrical transport and point-contact tunneling spectroscopy were used to investigate superconducting properties of the unique spinel oxide, LiTi$_2$O$_{4-\delta}$ films with various oxygen content. We find that upper critical field $B_\mathrm{c2}$ gradually increases as more impurities are brought into samples by carefully tuning deposition atmosphere. It is striking although transition temperature energy gap almost unchanged, an astonishing isotropic up $\sim$ 26 Tesla observed...
We present a newly developed facility, comprised of combinatorial laser molecular beam epitaxy system and an in-situ scanning tunneling microscopy (STM). This facility aims at accelerating the materials research in highly efficient way, by advanced high-throughput film synthesis techniques subsequent fast characterization surface morphology electronic states. Compared with uniform films deposited conventional methods, so-called thin will be beneficial to determining accurate phase diagrams...
As an essential component of the Materials Genome Initiative aiming to shorten period materials research and development, combinatorial synthesis rapid characterization technologies have been playing a more important role in exploring new comprehensively understanding properties. In this review, we discuss advantages high-throughput experimental techniques researches on superconductors. The evolution thin-film technology several high-speed screening devices are briefly introduced. We...
In situ Seebeck and Hall measurements on FeSe films are carried out to understand the intrinsic evolution of band structure as superconducting critical temperature $({T}_{c})$ is tuned by ionic liquid gating. At initial state, nonmonotonous behavior curves indicates multiband feature film. As ${T}_{c}$ increases via gating, hole gradually sinks below Fermi level. Meanwhile, energy electron reduces while its carrier density increases, indicating that flattening enhances. When reaches maximum...
We report the evolution of electrical transport properties in insulating FeSe films with electron doping induced by ionic liquid gating technique. Superconductivity never emerges strong insulators variable-range hopping behavior but is shown to arise once resistance normal state varies as $ln(1/T)$, indicating that this corresponds minimal conducting character for developing superconductivity. Our work points toward granular metallicity $ln(1/T)$ behavior, suggesting emergence...
The doping effects of transition metals (TMs = Mn, Co, Ni, and Cu) on the superconducting critical parameters are investigated in films iron selenide (Li,Fe)OHFeSe. samples grown via a matrix-assisted hydrothermal epitaxy method. Among TMs, elements Mn Co adjacent to Fe observed be incorporated into crystal lattice more easily. It is suggested that doped TMs mainly occupy sites intercalated (Li,Fe)OH layers rather than those FeSe layers. We find current density J c can enhanced much strongly...
Abstract Determining the pairing symmetry of single-layer FeSe on SrTiO3 is key to understanding enhanced mechanism; furthermore, it guides exploring new superconductors with high transition temperatures (Tc). Despite significant efforts, remains controversial whether sign-preserving s- or sign-changed s±-wave. Here, we investigate from a topological point view. Using low-temperature scanning tunneling microscopy/spectroscopy, have systematically characterized superconducting states at...