Jiangang Guo
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View article: Superconductivity-Driven Unipolar State in a Superatomic Antipolar Metal
Superconductivity-Driven Unipolar State in a Superatomic Antipolar Metal Open
Coexistence of electric polarization with metallicity or superconductivity defines the exotic polar metallic or superconducting states, which are exceedingly rare due to inherent mutual exclusivity. Recently, interweaved charge-density-wav…
View article: Realization of Kagome Kondo lattice
Realization of Kagome Kondo lattice Open
The Kondo lattice, describing a grid of the local magnetic moments coupling to itinerant electrons, is a fertile ground of strongly correlated states in condensed matter physics. While the Kagome lattice has long been predicted to host Kon…
View article: Solar Flare Tracks: Unveiling Features and Their Impact on Distinct Lunar Soil Transformations
Solar Flare Tracks: Unveiling Features and Their Impact on Distinct Lunar Soil Transformations Open
Studying crystal defects is essential for understanding a material's origin, evolution, and behavior. Lunar materials can exhibit defects from space weathering including high‐energy ion implantations, which rarely happens on Earth. Investi…
View article: Direct observation of phase transition in Hf0.5Zr0.5O2 thin films affected by top electrodes using in-situ STEM heating
Direct observation of phase transition in Hf0.5Zr0.5O2 thin films affected by top electrodes using in-situ STEM heating Open
High-scalability HfO2-based ferroelectric thin films are promising for application in fast, energy-efficient, and high-density non-volatile memories. This ferroelectricity is believed to originate from the metastable orthorhombic phase, wh…
View article: Quantum Acoustics with Superconducting Qubits in the Multimode Transition-Coupling Regime
Quantum Acoustics with Superconducting Qubits in the Multimode Transition-Coupling Regime Open
Hybrid mechanical-superconducting systems for quantum information processing have attracted significant attention due to their potential applications. In such systems, the weak coupling regime, dominated by dissipation, has been extensivel…
View article: Ising Superconductivity and Signatures of Orbital FFLO State in Non‐Centrosymmetric 3<i>R</i>‐TaSe<sub>2</sub> Thin Flakes
Ising Superconductivity and Signatures of Orbital FFLO State in Non‐Centrosymmetric 3<i>R</i>‐TaSe<sub>2</sub> Thin Flakes Open
Layered superconductors without inversion symmetry exhibit fantastic phenomena like spin‐triplet, Ising pairing, and non‐zero momentum of Cooper pairs. Identifying such unique compound and achieving accessible single crystals are rather ch…
View article: Fourfold Anisotropic Magnetoresistance and Unconventional Critical Exponents in Twinned FePd$_2$Te$_2$
Fourfold Anisotropic Magnetoresistance and Unconventional Critical Exponents in Twinned FePd$_2$Te$_2$ Open
As a special material symmetry operation, crystal twins usually influence physical properties. Here, detailed electrical transport and magnetic measurements were performed to reveal twinning effect on properties of van der Waals ferromagne…
View article: Quantum-Confined Tunable Ferromagnetism on the Surface of a Van der Waals Antiferromagnet NaCrTe<sub>2</sub>
Quantum-Confined Tunable Ferromagnetism on the Surface of a Van der Waals Antiferromagnet NaCrTe<sub>2</sub> Open
The surface of three-dimensional materials provides an ideal and versatile platform to explore quantum-confined physics. Here, we systematically investigate the electronic structure of Na-intercalated CrTe2, a van der Waals antiferromagnet…
View article: Realization of Kagome Kondo lattice
Realization of Kagome Kondo lattice Open
The Kondo lattice, describing a grid of the local magnetic moments coupling to itinerant electrons, is a fertile ground of strongly correlated states in condensed matter physics. While the Kagome lattice has long been predicted to host Kon…
View article: High‐Quality and Wafer‐Scale Cubic Silicon Carbide Single Crystals
High‐Quality and Wafer‐Scale Cubic Silicon Carbide Single Crystals Open
Cubic silicon carbide (3C‐SiC) has superior mobility and thermal conduction over that of widely applied hexagonal 4H‐SiC. Moreover, much lower concentration of interfacial traps between insulating oxide gate and 3C‐SiC helps fabricate reli…
View article: Superconductivity in pressurized trilayer La$_4$Ni$_3$O$_{10-δ}$ single crystals
Superconductivity in pressurized trilayer La$_4$Ni$_3$O$_{10-δ}$ single crystals Open
The pursuit of discovering new high-temperature superconductors that diverge from the copper-based paradigm1-3 carries profound implications for elucidating mechanisms behind superconductivity and may also enable new applications4-8. Here,…
View article: Superconducting Properties of La$_2$(Cu$_{1-x}$Ni_x)$_5$As$_3$O$_2$: A $\rm μ$SR Study
Superconducting Properties of La$_2$(Cu$_{1-x}$Ni_x)$_5$As$_3$O$_2$: A $\rm μ$SR Study Open
We report the results of muon spin rotation and relaxation ($\rm μ$SR) measurements on the recently discovered layered Cu-based superconducting material La$_{2}($Cu$_{1-x}$Ni$_{x}$)$_{5}$As$_{3}$O$_{2}$ ($x =$ 0.40, 0.45). Transverse-field…
View article: Tightly bound and room-temperature-stable excitons in van der Waals degenerate-semiconductor Bi4O4SeCl2 with high charge-carrier density
Tightly bound and room-temperature-stable excitons in van der Waals degenerate-semiconductor Bi4O4SeCl2 with high charge-carrier density Open
Excitons, which represent a type of quasi-particles consisting of electron-hole pairs bound by the mutual Coulomb interaction, are often observed in lowly-doped semiconductors or insulators. However, realizing excitons in semiconductors or…
View article: Tightly-bound and room-temperature-stable excitons in van der Waals degenerate-semiconductor Bi4O4SeCl2 with high charge-carrier density
Tightly-bound and room-temperature-stable excitons in van der Waals degenerate-semiconductor Bi4O4SeCl2 with high charge-carrier density Open
Excitons, which represent a type of quasi-particles consisting of electron-hole pairs bound by the mutual Coulomb interaction, were often observed in lowly-doped semiconductors or insulators. However, realizing excitons in the semiconducto…
View article: Evidence of a hydrated mineral enriched in water and ammonium molecules in the Chang'e-5 lunar sample
Evidence of a hydrated mineral enriched in water and ammonium molecules in the Chang'e-5 lunar sample Open
The presence and distribution of water on the Moon are fundamental to our understanding of the Earth-Moon system. Despite extensive research and remote detection, the origin and chemical form of lunar water (H2O) have remained elusive. In …
View article: Anomalous enhancement of charge density wave in kagome superconductor CsV3Sb5 approaching the 2D limit
Anomalous enhancement of charge density wave in kagome superconductor CsV3Sb5 approaching the 2D limit Open
The recently discovered kagome metals AV 3 Sb 5 (A = Cs, Rb, K) exhibit a variety of intriguing phenomena, such as a charge density wave (CDW) with time-reversal symmetry breaking and possible unconventional superconductivity. Here, we rep…
View article: Observation of non-superconducting phase changes in LuH$_{2\pm\text{x}}$N$_y$
Observation of non-superconducting phase changes in LuH$_{2\pm\text{x}}$N$_y$ Open
The recent report of near-ambient superconductivity in nitrogen doped lutetium hydride has triggered a worldwide fanaticism and raised major questions about the latest claims. An intriguing phenomenon of color changes in pressurized sample…
View article: Atomic Delocalization in Solar Flare Heavy-Ion Tracks and Its Impact on the Plastic Deformation of CE-5 Lunar Soil
Atomic Delocalization in Solar Flare Heavy-Ion Tracks and Its Impact on the Plastic Deformation of CE-5 Lunar Soil Open
Understanding the impact of space weathering on the mechanical properties of materials can provide strong implications for the exploration of the space including the building of a permanent base on airless planets. By examining the structu…
View article: Interweaving Polar Charge Orders in a Layered Metallic Superatomic Crystal
Interweaving Polar Charge Orders in a Layered Metallic Superatomic Crystal Open
Electronic properties of superatomic crystals have not been sufficiently explored due to the versatility of their building units; moreover, their interunit couplings are even poorly understood. Here, we present a joint experiment-theory in…
View article: Anomalous enhancement of charge density wave in kagome superconductor CsV3Sb5 approaching the 2D limit
Anomalous enhancement of charge density wave in kagome superconductor CsV3Sb5 approaching the 2D limit Open
The two-dimensional (2D) kagome lattice is a versatile platform to explore exotic quantum states. The recently discovered kagome superconductors AV3Sb5 (A= Cs, Rb, K) containing vanadium kagome lattices exhibit a variety of intriguing phen…
View article: Delicate Superconductivity in NaAlGe Single Crystal
Delicate Superconductivity in NaAlGe Single Crystal Open
Nodal-line superconductor NaAlSi with a transition temperature ($T_c$) of 7 K has attracted considerable attention in recent years, whereas its Ge counterpart, NaAlGe, does not superconduct down to the lowest temperature regardless of thei…
View article: Coevolution of Superconductivity With Structure and Hall Coefficient in Pressurized NaSn2As2
Coevolution of Superconductivity With Structure and Hall Coefficient in Pressurized NaSn2As2 Open
A new class of van der Waals-type layered materials, A Sn 2 Pn 2 ( A = Li, Na, Sr, Eu; Pn = As, P, Sb), has attracted much attention in the field of condensed matter physics because they have interesting physical properties and various gro…
View article: Two-Dimensional Electron Gas with High Mobility Forming at BaO/SrTiO<sub>3</sub> Interface
Two-Dimensional Electron Gas with High Mobility Forming at BaO/SrTiO<sub>3</sub> Interface Open
Two-dimensional electron gas (2DEG) with high electron mobility is highly desired to study the emergent properties and to enhance future device performance. Here we report the formation of 2DEG with high mobility at the interface between r…
View article: Discovery of Two Families of Vsb-Based Compounds with V-Kagome Lattice
Discovery of Two Families of Vsb-Based Compounds with V-Kagome Lattice Open
We report the structure and physical properties of two newly discovered compounds AV 8 Sb 12 and AV 6 Sb 6 (A = Cs, Rb), which have C 2 (space group: Cmmm ) and C 3 (space group: ) symmetry, respectively. The basic V-kagome unit ap…
View article: Superconductivity in layered Zintl phase LiSn2As2
Superconductivity in layered Zintl phase LiSn2As2 Open
We report the superconductivity in the layered Zintl phase LiSn$_2$As$_2$, which is isostructural to NaSn$_2$As$_2$ and has a transition temperature ($T_{\mathrm{c}}$) of 1.6 K. Despite similar $T_{\mathrm{c}}$ and Debye temperatures, subs…
View article: Reentrant superconductivity in superatomic crystal AuTe2Se4/3 induced by pressure
Reentrant superconductivity in superatomic crystal AuTe2Se4/3 induced by pressure Open
Superatomic crystal is a class of hierarchical materials composed of atomically precise clusters, self-assembling via van der Waals or covalent-like interactions. Here, we use the case of AuTe2Se4/3 to investigate the tunability of bonding…
View article: Emerging correlated charge orders in a layered super-atomic crystal
Emerging correlated charge orders in a layered super-atomic crystal Open
Synthesis of emergent crystals is the foundation of discovering novel phenomena and exploring intriguing properties. Comparing to the diverse exotic quantum states of covalent crystals, the unique super-atomic crystals are far from being e…