Wenge Yang
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View article: A Strongly Anisotropic Superconducting Gap in the Kagome Superconductor CsV$_3$Sb$_5$: A Study of Directional Point-Contact Andreev Reflection Spectroscopy
A Strongly Anisotropic Superconducting Gap in the Kagome Superconductor CsV$_3$Sb$_5$: A Study of Directional Point-Contact Andreev Reflection Spectroscopy Open
In the recently discovered V-based kagome superconductors AV$_3$Sb$_5$ (A = K, Rb, and Cs), superconductivity is intertwined with an unconventional charge density wave (CDW) order, raising a fundamental concern on the superconducting gap s…
View article: 3D and 4D World Modeling: A Survey
3D and 4D World Modeling: A Survey Open
World modeling has become a cornerstone in AI research, enabling agents to understand, represent, and predict the dynamic environments they inhabit. While prior work largely emphasizes generative methods for 2D image and video data, they o…
View article: Orbital Signatures of Density Wave Transition in La3Ni2O7-delta and La2PrNi2O7-delta RP-Nickelates Probed via in-situ X-ray Absorption Near-edge Spectroscopy
Orbital Signatures of Density Wave Transition in La3Ni2O7-delta and La2PrNi2O7-delta RP-Nickelates Probed via in-situ X-ray Absorption Near-edge Spectroscopy Open
The report of superconductivity (SC) with Tc~80 K in bilayer Ruddlesden-Popper (RP) nickelate La3Ni2O7-delta have sparked considerable investigations on its normal state properties and SC mechanism under pressure and at low temperature. It…
View article: Distinguishing Electronic Band Structure of Single-layer and Bilayer Ruddlesden-Popper Nickelates Probed by in-situ High Pressure X-ray Absorption Near-edge Spectroscopy
Distinguishing Electronic Band Structure of Single-layer and Bilayer Ruddlesden-Popper Nickelates Probed by in-situ High Pressure X-ray Absorption Near-edge Spectroscopy Open
We report a comprehensive study of electronic band structure for single-layer (SL) and bilayer (BL) RP-nickelates probed by in-situ HP X-ray absorption near edge spectroscopy (XANES). At ambient pressure (AP), the energy splitting delta_E …
View article: Pressure Impact on the Crystal Structure, Optical, and Transport Properties in Layered Oxychalcogenides BiCu<i>Ch</i>O (<i>Ch</i> = S, Se)
Pressure Impact on the Crystal Structure, Optical, and Transport Properties in Layered Oxychalcogenides BiCu<i>Ch</i>O (<i>Ch</i> = S, Se) Open
The layered oxychalcogenides BiCuChO (Ch = S, Se, Te) represent a unique family of two-dimensional semiconductors with extraordinary optoelectronic and thermoelectric properties. Chemical strategies such as elemental doping have been used …
View article: Anomalous Surface Doping Effect in Semiconductor Nanowires
Anomalous Surface Doping Effect in Semiconductor Nanowires Open
Surface doping is being used as an effective approach to improve the mechanical, optical, electronic, and magnetic properties of various materials. For example, experimental studies have proven that rare-earth element doping can enhance th…
View article: Anomalous bulk modulus in vanadate spinels
Anomalous bulk modulus in vanadate spinels Open
All single-valent oxide spinels are insulators. The relatively small activation energy in the temperature dependence of resistivity in vanadate spinels led to the speculation that the spinels are near the crossover from localized to itiner…
View article: Anomalous expansion of Nb nanowires in a NiTi matrix under high pressure
Anomalous expansion of Nb nanowires in a NiTi matrix under high pressure Open
Under high pressure, materials usually shrink during compression as described by an equation of state. Here, we present the anomalous volume expansion behavior of a one-dimensional Nb nano-wire embedded in a NiTi transforming matrix, while…
View article: Pressure induced polymerization of acetylide anions in CaC<sub>2</sub> and 10<sup>7</sup> fold enhancement of electrical conductivity
Pressure induced polymerization of acetylide anions in CaC<sub>2</sub> and 10<sup>7</sup> fold enhancement of electrical conductivity Open
Pressure induced polymerization of CaC 2 in the amorphous phase is evidenced for the first time, accompanied by a 10 7 fold enhancement of the electrical conductivity.
View article: Giant Pressure‐Driven Lattice Collapse Coupled with Intermetallic Bonding and Spin‐State Transition in Manganese Chalcogenides
Giant Pressure‐Driven Lattice Collapse Coupled with Intermetallic Bonding and Spin‐State Transition in Manganese Chalcogenides Open
Materials with an abrupt volume collapse of more than 20 % during a pressure‐induced phase transition are rarely reported. In such an intriguing phenomenon, the lattice may be coupled with dramatic changes of orbital and/or the spin‐state …
View article: Sodium Ion Transport Mechanisms in Antiperovskite Electrolytes Na<sub>3</sub>OBr and Na<sub>4</sub>OI<sub>2</sub>: An <i>in Situ</i> Neutron Diffraction Study
Sodium Ion Transport Mechanisms in Antiperovskite Electrolytes Na<sub>3</sub>OBr and Na<sub>4</sub>OI<sub>2</sub>: An <i>in Situ</i> Neutron Diffraction Study Open
Na-rich antiperovskites are recently developed solid electrolytes with enhanced sodium ionic conductivity and show promising functionality as a novel solid electrolyte in an all solid-state battery. In this work, the sodium ionic transport…
View article: CCDC 1501593: Experimental Crystal Structure Determination
CCDC 1501593: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 1501580: Experimental Crystal Structure Determination
CCDC 1501580: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 1501596: Experimental Crystal Structure Determination
CCDC 1501596: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 1501600: Experimental Crystal Structure Determination
CCDC 1501600: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 1501606: Experimental Crystal Structure Determination
CCDC 1501606: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Synthesis, Structure, and Pressure-Induced Polymerization of Li<sub>3</sub>Fe(CN)<sub>6</sub> Accompanied with Enhanced Conductivity
Synthesis, Structure, and Pressure-Induced Polymerization of Li<sub>3</sub>Fe(CN)<sub>6</sub> Accompanied with Enhanced Conductivity Open
Pressure-induced polymerization of charged triple-bond monomers like acetylide and cyanide could lead to formation of a conductive metal-carbon network composite, thus providing a new route to synthesize inorganic/organic conductors with t…
View article: Deformation Twinning of a Silver Nanocrystal under High Pressure
Deformation Twinning of a Silver Nanocrystal under High Pressure Open
Within a high-pressure environment, crystal deformation is controlled by complex processes such as dislocation motion, twinning, and phase transitions, which change materials' microscopic morphology and alter their properties. Understandin…
View article: K<sub>3</sub>Fe(CN)<sub>6</sub> under External Pressure: Dimerization of CN<sup>–</sup> Coupled with Electron Transfer to Fe(III)
K<sub>3</sub>Fe(CN)<sub>6</sub> under External Pressure: Dimerization of CN<sup>–</sup> Coupled with Electron Transfer to Fe(III) Open
The addition polymerization of charged monomers like C≡C2– and C≡N– is scarcely seen at ambient conditions but can progress under external pressure with their conductivity significantly enhanced, which expands the research field of polymer…
View article: An insight into the origin of low-symmetry bridging phase and enhanced functionality in systems containing competing phases
An insight into the origin of low-symmetry bridging phase and enhanced functionality in systems containing competing phases Open
High piezoelectric activity of ferroelectrics with morphotropic phase boundary (MPB) compositions has been the focus of numerous recent investigations. The concept of a bridging low-symmetry phase between competing phase structures of the …
View article: Origin of the enhanced piezoelectric thermal stability in BiScO3-PbTiO3 single crystals
Origin of the enhanced piezoelectric thermal stability in BiScO3-PbTiO3 single crystals Open
BiScO3-PbTiO3 single crystals were reported to possess high piezoelectric coefficient of 1200 pC/N and Curie temperature of >400 °C, exhibiting excellent thermal stability of properties up to 350 °C. However, the origin of the thermal s…
View article: Nuclear resonant inelastic X-ray scattering at high pressure and low temperature
Nuclear resonant inelastic X-ray scattering at high pressure and low temperature Open
A new synchrotron radiation experimental capability of coupling nuclear resonant inelastic X-ray scattering with the cryogenically cooled high-pressure diamond anvil cell technique is presented. The new technique permits measurements of ph…