A5102736209- Electronic and Structural Properties of Oxides
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Semiconductor materials and devices
- Ferroelectric and Negative Capacitance Devices
- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Magnetic properties of thin films
- Magnetism in coordination complexes
- Corrosion Behavior and Inhibition
- Quantum and electron transport phenomena
- Atomic and Subatomic Physics Research
- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Catalytic Processes in Materials Science
- Photonic Crystals and Applications
- Organic and Molecular Conductors Research
- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Spectroscopy and Quantum Chemical Studies
- Metal Extraction and Bioleaching
- Terahertz technology and applications
- Rare-earth and actinide compounds
- Fullerene Chemistry and Applications
- Topological Materials and Phenomena
Beihang University
2008-2025
UNSW Sydney
2024-2025
Shanghai Advanced Research Institute
2024
Chinese Academy of Sciences
2017-2024
Kunming University of Science and Technology
2018-2024
University of Chinese Academy of Sciences
2018-2023
Ningxia University
2023
Henan University of Science and Technology
2023
Institute of Physics
2018-2022
Transnational Press London
2018
The oxide interface between LaAlO3 and KTaO3(111) can harbor a superconducting state. We report that by applying gate voltage (VG) across KTaO3, the be continuously tuned from into insulating states, yielding dome-shaped Tc-VG dependence, where Tc is transition temperature. electric gating has only minor effect on carrier density but strong one mobility. interpret tuning of mobility in terms change spatial profile carriers hence, effective disorder. As temperature decreased, resistance...
Single crystals of Ba(8)Au(5.3)Ge(40.7) [space group Pm(3)n (No. 223), a = 10.79891(8) Å] were prepared by Bridgman technique. The crystal structure refinement based on single-crystal X-ray diffraction data does not reveal any vacancies in the Au/Ge framework or cages. In addition to ionic bonding between Ba and anionic framework, direct interaction Au atoms was identified applying electron localizability indicator. As expected chemical-bonding picture, is diamagnet shows p-type electrical...
Two-dimensional electron gases (2DEGs) at oxide interfaces, which provide unique playgrounds for emergent phenomena, have attracted increasing attention in recent years. While most of the previous works focused on 2DEGs LaAlO_{3}/SrTiO_{3} here we report a new kind formed between magnetic insulator EuO and high-k perovskite KTaO_{3}. The are not only highly conducting, with maximal Hall mobility 111.6 cm^{2}/V s 2 K, but also well spin polarized, showing strongly hysteretic magnetoresistance...
Since interface superconductivity was discovered at the between two insulating layers LaAlO3 and SrTiO3, such interface-induced superconducting systems have been a research hotspot in superconductivity. Here, we report homogeneous interfaces formed by stacking chemically exfoliated monolayer TaS2 nanosheets randomly. Enhanced of Tc = 3 K is observed, compared with 0.8 parent 2H-TaS2. The measurement heat capacity shows increase electronic specific-heat coefficient γ restacked to 2H-TaS2...
We report on the observation of a ${T}_{c}\ensuremath{\sim}0.9\text{ }\text{ }\mathrm{K}$ superconductivity at interface between ${\mathrm{LaAlO}}_{3}$ film and $5d$ transition metal oxide ${\mathrm{KTaO}}_{3}(110)$ single crystal. The shows large anisotropy upper critical field, its superconducting is consistent with Berezinskii-Kosterlitz-Thouless transition. Both facts suggest that two-dimensional (2D) in nature. carrier density measured 5 K...
The rapid advancement of future information technologies necessitates the development high-efficiency and cost-effective solutions for terahertz emitters, which hold significant practical value in next-generation communication, sensing, quantum computing applications. Distinguished from trivial materials, three-dimensional topological insulators exhibit spin-momentum locking helical Dirac surface states, making them highly efficient spin-to-charge converters that have potential to...
Five-fold twinned, starfish-like Rh nanocrystals consisting of five arms (see TEM) have been synthesized in high yields with the use [{(CF3COO)2Rh}2] as a precursor to completely eliminate oxidative etching from this system. The as-prepared were shown great performance substrate for SERS. Detailed facts importance specialist readers are published "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by authors. Please note:...
Controlling electronic processes in low-dimension electron systems is centrally important for both fundamental and applied researches. While most of the previous works focused on SrTiO3-based two-dimensional gases (2DEGs), here we report a comprehensive investigation this regard amorphous-LaAlO3/KTaO3 2DEGs with Fermi energy ranging from ∼13 meV to ∼488 meV. The observation dramatic variation Rashba spin–orbit coupling (SOC) as sweeps through 313 meV: SOC effective field first jumps then...
The free-field switching of the perpendicular magnetization by out-of-plane polarized spin current induced spin-orbit torque makes it a promising technology for developing high-density memory and logic devices. materials intrinsically with low symmetry are generally utilized to generate polarization. However, generation engineering has not yet been reported. Here, we demonstrate that paramagnetic CaRuO3 films able crystal symmetry. non-uniform oxygen octahedral tilt/rotation along film's...
Self-endowed internal electric field (IEF) of BiOX crystals affects the effective electrons through O → Bi X path to BiOX(001) interfaces with key roles as “Magpie Bridge”.
Two-dimensional electron gases (2DEGs) at the LaAlO_{3}/SrTiO_{3} interface have attracted wide interest, and some exotic phenomena are observed, including 2D superconductivity, magnetism, diverse effects associated with Rashba spin-orbit coupling. Despite intensive investigations, however, there still hidden aspects that remain unexplored. For first time, here we report on circular photogalvanic effect (CPGE) for oxide 2DEG. Spin polarized electrons selectively excited by light from in-gap...
For polar/nonpolar heterostructures, Maxwell's theory dictates that the electric potential in polar components will increase divergently with film thickness. LaAlO3/SrTiO3, a conceptually intriguing route, termed charge reconstruction, has been proposed to avert such "polar catastrophe". The existence of LaAlO3 is prerequisite for validity reconstruction picture, yet date, its direct measurement remains major challenge. Here we establish unambiguously residual ultrathin films on SrTiO3,...
With the help of two-dimensional electron gas (2DEG) at LaAlO3–SrTiO3 interface, spin and charge currents can be interconverted. However, conversion efficiency has been strongly depressed by LaAlO3, which blocks transmission. It is therefore highly desired to explore 2DEGs sandwiched between ferromagnetic insulators that are transparent for magnons. By constructing epitaxial heterostructure with EuO, conducting current but insulating electric current, KTaO3, we successfully obtained 2DEGs,...
Modifying the crystal structure and corresponding functional properties of complex oxides by regulating their oxygen content has promising applications in energy conversion chemical looping, where controlling migration plays an important role. Therefore, finding efficacious feasible method to facilitate become a critical requirement for practical applications. Here, we report compressive-strain-facilitated with reversible topotactic phase transformation (RTPT) La0.5Sr0.5CoOx films based on...
Abstract By modifying the entangled multi‐degrees of freedom transition‐metal oxides, interlayer coupling usually produces interfacial phases with unusual functionalities. Herein, a symmetry‐mismatch‐driven phase transition from paramagnetic to ferromagnetic state is reported. constructing superlattices using CaRuO 3 and SrTiO , two oxides different oxygen octahedron networks, tilting/rotation octahedra near interface tuned dramatically, causing an angle increase ≈150° ≈165° for RuORu...
Oxygen stoichiometry is critical for physical properties, but it hard to precisely control in many multivalent transition metal oxides, example, cuprate superconductors, magnetoresistive manganite and TiOx (x < 2). We have developed a new method synthesize rock-salt TiO sealed evacuated quartz tube by using KClO4 as the only oxygen source react with elemental Ti (in Ti/O molar ratio of 1:1). The stoichiometric titanium monoxide (TiO) exhibits an enhanced superconductivity temperature (Tc)...
Despite intensive research, the mechanism determining terahertz (THz) emission of ferromagnetic (FM) metallic monolayers remains elusive. Here, we report on results a systematic investigation THz generated by pumping Ni80Fe20 Al2O3 substrates with femtosecond laser. We found solid evidence that is dominated anomalous Nernst effect (ANE), in which transient spin-polarized charge current can be induced an ultrafast electron temperature gradient picosecond timescale, outputting emission....
Due to the strong interlayer coupling between multiple degrees of freedom, oxide heterostructures have demonstrated exotic properties that are not shown by their bulk counterparts. One most interesting is ferromagnetism at interface formed "nonferromagnetic" compounds. Here we report on interfacial ferromagnetic phase induced in superlattices consisting two paramagnetic oxides CaRuO3 (CRO) and LaNiO3 (LNO). By varying sublayer thickness superlattice period, demonstrate order has been...
Fullerenes, with well-defined molecular structures and high scalability, hold promise as fundamental building blocks for creating a variety of carbon materials. The fabrication transfer large-area films precisely controlled thicknesses morphologies on desired surfaces are crucial designing developing fullerene-based materials devices. In this work, we present strategies solid-state transferring C
Exploring the intricate interplay between magnetism and superconductivity is crucial for unveiling underlying mechanisms of unconventional superconductivity. Here, we report on magnetotransport evidence coexistence a two-dimensional (2D) superconducting state 2D ferromagnetic at interface amorphous CaZrO3 film (111)-oriented KTaO3 single crystal. Remarkably, fingerprint ferromagnetism, i.e., hysteretic magnetoresistance loops, observed in state. The butterfly-shaped hysteresis with twin...
Exploration and manipulation of electronic states in low-dimensional systems are great importance the fundamental practical aspects nanomaterial nanotechnology. Here, we demonstrate that incorporation vacancy defects into monatomic indium wires on $n$-type Si(111) can stabilize electronically phase-separated ground where insulating $8\ifmmode\times\else\texttimes\fi{}2$ metallic $4\ifmmode\times\else\texttimes\fi{}1$ phases coexist. Furthermore, areal ratio two be tuned reversibly by...
Investigation on terahertz (THz) emission is important not only for fundamental research but also practical application. A rapidly developing approach to generate THz using a heterostructure composed of ferromagnetic metal (FM) and nonmagnetic (NM) which pumped by femtosecond laser pulse. Previous works in this regard mainly focused bilayer with heavy NM (such as Pt) large spin Hall angle. Here we present comprehensive investigation from Co/Al heterostructures stemming the inverse effect. It...
Spin-polarized two-dimensional electron gas (2DEG) at the interface of two insulating perovskite oxides has been a focus intensive studies in recent years. So far all attempts to construct magnetic 2DEG are based on selection an appropriate buffer layer or cap $\mathrm{SrTi}{\mathrm{O}}_{3}$-based heterostructures, and effect thus produced is indirect weak. Here, we fabricated Fe-doped $\mathrm{SrTi}{\mathrm{O}}_{3}$ that superparamagnetic rather than diamagnetic like...
The use of water-soluble sacrificial layer Sr$_3$Al$_2$O$_6$ has tremendously boosted the research on freestanding functional oxide thin films, especially thanks to its ultimate capability produce high-quality epitaxial perovskite films. However, costly single-crystalline substrates, e.g. SrTiO$_3$, were generally discarded after obtaining Here, we demonstrate that SrTiO$_3$ substrates can be recycled fabricate La$_{0.7}$Sr$_{0.3}$MnO$_3$ films with nearly identical structural and electrical...
Abstract Ferromagnetic materials with a strong spin‐orbit coupling (SOC) have attracted much attention in recent years because of their exotic properties and potential applications energy‐efficient spintronics. However, such are scarce nature. Here, proximity‐induced paramagnetic to ferromagnetic transition for the heavy metal oxide CaRuO 3 (001)‐(LaMnO /CaRuO ) superlattices is reported. Anomalous Hall effect observed temperature range up 180 K. Maximal anomalous conductivity angle as large...