A5078050424- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Physics of Superconductivity and Magnetism
- Multiferroics and related materials
- Rare-earth and actinide compounds
- Iron-based superconductors research
- Electronic and Structural Properties of Oxides
- Nuclear materials and radiation effects
- Inorganic Chemistry and Materials
- Magnetism in coordination complexes
- X-ray Diffraction in Crystallography
- Ferroelectric and Piezoelectric Materials
- Magnetic Properties of Alloys
- Topological Materials and Phenomena
- Theoretical and Computational Physics
- Crystal Structures and Properties
- Superconducting Materials and Applications
- Microwave Dielectric Ceramics Synthesis
- Atomic and Subatomic Physics Research
- Perovskite Materials and Applications
- Algebraic structures and combinatorial models
- Superconductivity in MgB2 and Alloys
- Advanced Chemical Sensor Technologies
- Magnetic properties of thin films
- Organic and Molecular Conductors Research
Songshan Lake Materials Laboratory
2021-2025
Max Planck Institute for Chemical Physics of Solids
2015-2024
Chinese Academy of Sciences
2023
RIKEN Nishina Center
2014-2017
Zhejiang University
2010-2017
State Key Laboratory of Silicon Materials
2010-2017
Max Planck Society
2015
RIKEN Advanced Science Institute
2013
The material class of rare earth nickelates with high Ni$^{3+}$ oxidation state is generating continued interest due to the occurrence a metal-insulator transition charge order and appearance non-collinear magnetic phases within this insulating regime. recent theoretical prediction for superconductivity in LaNiO$_3$ thin films has also triggered intensive research efforts. seems be only nickelate that stays metallic paramagnetic down lowest temperatures. So far, centimetre-sized...
We report on the single crystal growth of single-layer perovskite cobaltate LaSrCoO4 that was grown by optical floating zone method using high oxygen pressures. Phase purity and crystallinity were confirmed X-ray diffraction techniques. The pure Co3+ oxidation state absorbtion spectroscopy measurements. A transition to a spin glass is observed at ∼7 K in magnetic susceptibility specific heat
Among others, pyrochlore iridates with strong spin-orbit coupling have received attention recently due to the prediction of Weyl semimetal states in these materials. Despite tremendous efforts, there exists no direct measurement spin structure at iridium site by means neutron diffraction. This might be caused small ordered Ir moment and also absorbing properties ions. Up now, only basic indirect evidence for exists. From observation here full magnetic Nd${}_{2}$Ir${}_{2}$O${}_{7}$ via...
The efficient excitation and controlled propagation of nanoscale spin waves remain significant challenges, as their intrinsic dispersion relations are primarily determined by magnetic dipole exchange interactions. Here we report the first observed coexistence quantum wave single-molecule magnet behavior in a mixed chromium(III) dysprosium(III) complex, namely Dy4Cr2(μ3-F)2(mdea)3(piv)10, which shows large ferrimagnetic ground moment with restricted tunneling gap (<3.8 × 10–7 cm–1) up to nine...
The study reports the discovery of Cs(chrysene˙ − )(THF) 0.5 ·(THF) 0.25 , a pure-phase spin-½ organic magnet featuring triangular-based zigzag magnetic layers and exhibiting quantum spin liquid state with gapless excitations.
Nickelate superconductors have attracted a great deal of attention over the past few decades due to their similar crystal and electronic structures with high-temperature cuprate superconductors. Here, we report superconductivity in pressurized Ruddlesden-Popper phase single <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"...
Motivated by the rich interplay among electronic correlation, spin-orbit coupling (SOC), crystal-field splitting, and geometric frustrations in honeycomblike lattice, we systematically investigated magnetic properties of Li${}_{2}$RhO${}_{3}$. The material is semiconducting with a narrow band gap $\ensuremath{\Delta}\ensuremath{\sim}78$ meV, its temperature dependence resistivity conforms to three-dimensional variable range hopping mechanism. No long-range ordering was found down 0.5 K, due...
Abstract Trace NO 2 detection is essential for the production and life, where sensing strategy appropriate rapid but lacks molecular specificity. This investigation proposes a mechanism dominated by surface-scattering to achieve molecularly-specific detection. Two-dimensional Bi O Se firstly fabricated into Schottky-junction-based gas-sensor. Applied with an alternating excitation, sensor simultaneously outputs multiple response signals (i.e., resistance, reactance, impedance angle). Their...
Muon-spin relaxation results on the pyrochlore iridate Nd$_2$Ir$_2$O$_7$ are reported. Spontaneous coherent muon-spin precession below metal-insulator transition (MIT) temperature of about 33 K is observed, indicating appearance a long-ranged magnetic ordering Ir$^{4+}$ moments. With further decrease in temperature, internal field at muon site increases again 9 K. The second increase suggests Nd$^{3+}$ moments, which consistent with previous neutron experiment. Our suggest that MIT and...
A novel electrocatalyst based on the LIFT graphene/Cu<sub>x</sub>O with expressive HER activity has successfully been fabricated <italic>via</italic> one step of laser deposition method. It can be foreseen more electrocatalysts will obtained inspired by this work.
A quantum spin liquid (QSL) is an exotic state in which electron spins are highly entangled, yet keep fluctuating even at zero temperature. Experimental realization of model QSLs has been challenging due to imperfections, such as antisite disorder, strain, and extra or a lack interactions real materials compared the Hamiltonian. Here we report magnetic susceptibility, thermodynamic, inelastic neutron scattering (INS), muon-spin relaxation studies on polycrystalline sample...
Nickelate superconductors have attracted a great deal of attention over the past few decades due to their similar crystal and electronic structures with high-temperature cuprate superconductors. Here, we report superconductivity in pressurized Ruddlesden-Popper phase single crystal, La4Ni3O10 (n = 3), its interplay density wave order diagram. With increasing pressure, as indicated by anomaly resistivity is progressively suppressed, followed emergence around 25 K. Our angle-resolved...
The rare-earth (RE) based Shastry-Sutherland lattice (SSL) materials have attracted recent attention for exploring the exotic magnetic phases of $4f$ electrons. Here, we present a comparative study on low-temperature magnetization and specific-heat results two tetragonal structure compounds ${RE}_{2}\mathrm{B}{\mathrm{e}}_{2}\mathrm{Ge}{\mathrm{O}}_{7}$ ($RE=\mathrm{Pr}$, Nd), where non-Kramers $\mathrm{P}{\mathrm{r}}^{3+}$ ($J=4$) ions Kramers $\mathrm{N}{\mathrm{d}}^{3+}$ ($J=9/2$) are...
Abstract Here we report the successful synthesis of large single crystals triangular frustrated PrMgAl 11 O 19 using optical floating zone technique. Single crystal x-ray diffraction (XRD) measurements unveiled presence quenched disorder within mirror plane, specifically ~7% Pr ions deviating from ideal 2 d site towards 6 h site. Magnetic susceptibility revealed an Ising anisotropy with c -axis being easy axis. Despite a spin–spin interaction that develops below ~10 K and considerable...
Heavily doped Ba$_{1-x}$K$_{x}$Mn$_{2}$As$_{2}$ ($x$=0.19 and 0.26) single crystals were successfully grown, investigated by the measurements of resistivity anisotropic magnetic susceptibility. In contrast to antiferromagnetic insulating ground state undoped BaMn$_{2}$As$_{2}$, K-doped show metallic conduction with weak ferromagnetism below $\sim$50 K Curie-Weiss-like in-plane susceptibility above K. Under high pressures up 6 GPa, low-temperature metallicity changes into a characterized...
The magnetic ground state of the Rh-doped Kondo semiconductor CeRu${}_{2}$Al${}_{10}$ [Ce(Ru${}_{1\ensuremath{-}x}$Rh${}_{x}$)${}_{2}$Al${}_{10}$] is investigated with muon spin relaxation method. Muon precession two frequencies observed in $x=0$ sample, while only one frequency present $x=0.05$ and 0.10 samples, which attributed to broad static field distribution at site. internal site enhanced from about 180 G sample 800 supporting spin-flop transition as suggested by magnetization...
We observe quasi-static incommensurate magnetic peaks in neutron scattering experiments on layered cobalt oxides La2-xSrxCoO4 with high Co oxidation states that have been reported to be paramagnetic. This enables us measure the excitations this highly hole-doped regime and compare our results those found low-doped exhibit hourglass spectra. The shape of completely disappears given a Sr doping. Moreover, broad low-energy are found, which not centered at peak positions but around...
The exploration of new rare-earth (RE)-based triangular-lattice materials plays a significant role in motivating the discovery exotic magnetic states. Herein, we report family hexagonal perovskite compounds Ba6RE2Ti4O17 (RE = Nd, Sm, Gd, Dy–Yb) with space group P63/mmc, where RE3+ ions are distributed on parallel layers within ab-plane and stacked an 'AA'-type fashion along c-axis. low-temperature characterizations indicate that all synthesized exhibit dominant antiferromagnetic (AFM)...
We report on the determination of full magnetic structure ${\mathrm{Tb}}_{2}{\mathrm{Ir}}_{2}{\mathrm{O}}_{7}$ including Ir sublattice by means powder neutron diffraction. Below ${T}_{N}\ensuremath{\sim}125\phantom{\rule{0.28em}{0ex}}\mathrm{K}$, both Tb and sublattices order in a so-called all-in/all-out structure. However, additional intensity appears below 10 K (111) reflection indicating change were able to describe low-temperature with an $XY$ component sublattices. The moment sizes at...
Magnetic-ordered states of the pyrochlore iridates Nd2Ir2O7 (Nd227) and Sm2Ir2O7 (Sm227), showing metal–insulator transitions at 33 117 K, respectively, were studied by both muon-spin-relaxation (μSR) method density functional theory (DFT) calculations. A long-range magnetic ordering Ir moments appeared in conjunction with metal insulator transition, additional long-range-ordered Nd/Sm confirmed temperatures below about 10 K. We found that all-in all-out spin structure most convincingly...
We report on a combined soft x-ray absorption and magnetic circular dichroism (XMCD) study at the Co-$L_{3,2}$ hybrid 3$d$/5$d$ solid state oxide Sr$_2$Co$_{0.5}$Ir$_{0.5}$O$_4$ with K$_2$NiF$_4$ structure. Our data indicate unambiguously pure high spin $(S=2)$ for Co$^{3+}$ (3$d^6$) ions significant unquenched orbital moment $L_z/2S_z=0.25$ despite sizeable elongation of CoO$_6$ octahedra. Using quantitative model calculations based parameters consistent our spectra, we have investigated...