Ming‐Wen Chu
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View article: Unidirectional and collective emission of integrated quantum emitters
Unidirectional and collective emission of integrated quantum emitters Open
Unidirectional emission holds significant potential for advancing integrated photonics and quantum information technologies. However, the inherent randomness of spontaneous emission fundamentally makes its efficient realization rather chal…
View article: Collimated Hard X-Rays from Hybrid Laser and Plasma Wakefield Accelerators
Collimated Hard X-Rays from Hybrid Laser and Plasma Wakefield Accelerators Open
We report a synergistic enhancement of betatron radiation based on the hybrid laser and plasma wakefield acceleration scheme. Quasi-phase-stable acceleration in an up-ramp plasma density first generates GeV-energy electron beams that act a…
View article: Direct visualization of a disorder driven electronic smectic phase in nonsymmorphic square-net semimetal GdSbTe
Direct visualization of a disorder driven electronic smectic phase in nonsymmorphic square-net semimetal GdSbTe Open
Electronic liquid crystal (ELC) phases are spontaneous symmetry breaking states believed to arise from strong electron correlation in quantum materials such as cuprates and iron pnictides. Here, we report a direct observation of a smectic …
View article: Controlled Betatron radiation from high-charge electron beams in multiple plasma channels
Controlled Betatron radiation from high-charge electron beams in multiple plasma channels Open
We propose what we believe is a novel approach for generating intense Betatron radiation in multiple plasma channels induced by the interference of two relativistic, intense laser pulses in near-critical density plasma (NCDP). Our method u…
View article: Crystalline Water Structure in Room‐Temperature Clathrate State: Hydrogen‐Bonded Pentagonal Rings
Crystalline Water Structure in Room‐Temperature Clathrate State: Hydrogen‐Bonded Pentagonal Rings Open
Water hydrogen bonding is extremely versatile; ≈20 ice structures and several types of clathrate hydrate structures are identified. These crystalline water structures form at temperatures below room temperature and/or at high pressure. Tra…
View article: Epitaxial Ferroelectric Hexagonal Boron Nitride Grown on Graphene
Epitaxial Ferroelectric Hexagonal Boron Nitride Grown on Graphene Open
Ferroelectricity realized in van der Waals (vdW) materials with non‐centrosymmetric stacking configurations holds promise for future 2D devices with nonvolatile and reconfigurable functionalities. However, the epitaxial growth of ferroelec…
View article: In-situ heating TEM observation of solidification cell evolutions in an Al-Fe alloy built by laser-powder bed fusion
In-situ heating TEM observation of solidification cell evolutions in an Al-Fe alloy built by laser-powder bed fusion Open
Cellular structures (i.e., solidification cells) are a unique feature within alloys fabricated through rapid solidification, such as laser-powder bed fusion (L-PBF). Ever since the report of these structures’ beneficial effects on the mate…
View article: The growing charge-density-wave order in CuTe lightens and speeds up electrons
The growing charge-density-wave order in CuTe lightens and speeds up electrons Open
Charge density waves (CDWs) are pervasive orders in solids that usually enhance the effective mass (m*) and reduce the Fermi velocity ( ) of carriers. Here, we report on the inverse - a reduced m* and an enhanced correlated with th…
View article: Ti30Zr10Hf10Ni35Cu15 high-entropy shape memory alloy with tunable transformation temperature and elastocaloric performance by heat treatment
Ti30Zr10Hf10Ni35Cu15 high-entropy shape memory alloy with tunable transformation temperature and elastocaloric performance by heat treatment Open
This work investigates the influence of heat treatments on a pseudo-binary Ti30Zr10Hf10Ni35Cu15 high-entropy shape memory alloy. Heat treatments on the alloy resulted in the formation of second phases and thus were able to adjust its trans…
View article: Three-dimensional ultrafast charge-density-wave dynamics in CuTe
Three-dimensional ultrafast charge-density-wave dynamics in CuTe Open
Charge density waves (CDWs) involved with both electronic and phononic subsystems simultaneously are a common quantum state in solid-state physics, especially in low-dimensional materials. However, there is no complete CDW phase diagram in…
View article: Antiferroelectric PbSnO<sub>3</sub> Epitaxial Thin Films
Antiferroelectric PbSnO<sub>3</sub> Epitaxial Thin Films Open
In condensed matter physics, oxide materials show various intriguing physical properties. Therefore, many efforts are made in this field to develop functional oxides. Due to the excellent potential for tin‐based perovskite oxides, an expan…
View article: Publisher's Note: “Perpendicular magnetic tunnel junctions based on half-metallic NiCo2O4” [Appl. Phys Lett. <b>117</b>, 042408 (2020)]
Publisher's Note: “Perpendicular magnetic tunnel junctions based on half-metallic NiCo2O4” [Appl. Phys Lett. <b>117</b>, 042408 (2020)] Open
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View article: Tailoring excitonic states of van der Waals bilayers through stacking configuration, band alignment, and valley spin
Tailoring excitonic states of van der Waals bilayers through stacking configuration, band alignment, and valley spin Open
We report the layer-hybridized valley excitons in 2D hetero- and homobilayers manifested by band alignment and valley spin.
View article: Hidden Antipolar Order Parameter and Entangled Neel-Type Charged Domain Walls in Hybrid Improper Ferroelectrics
Hidden Antipolar Order Parameter and Entangled Neel-Type Charged Domain Walls in Hybrid Improper Ferroelectrics Open
Hybrid improper ferroelectricity (HIF) denotes a new class of polar instability by the mixture of two octahedral-distortion modes and can feature the coexistence of abundant head-to-head and tail-to-tail polar domains, of which the domain …
View article: Superconducting topological surface states in the noncentrosymmetric bulk superconductor PbTaSe <sub>2</sub>
Superconducting topological surface states in the noncentrosymmetric bulk superconductor PbTaSe <sub>2</sub> Open
Topological surface states in PbTaSe 2 show fully gapped superconductivity, making it a potential topological superconductor.
View article: Large single crystal growth, transport property and spectroscopic characterizations of three-dimensional Dirac semimetal Cd3As2
Large single crystal growth, transport property and spectroscopic characterizations of three-dimensional Dirac semimetal Cd3As2 Open
The three dimensional (3D) Dirac semimetal is a new quantum state of matter that has attracted much attention recently in physics and material science. Here, we report on the growth of large plate-like single crystals of Cd 3 As 2 in two m…
View article: Functional helical silica nanofibers with coaxial mixed mesostructures for the fabrication of PtCo nanowires that display unique geometry-dependent magnetism
Functional helical silica nanofibers with coaxial mixed mesostructures for the fabrication of PtCo nanowires that display unique geometry-dependent magnetism Open
Helical mesoporous silicas are notable from a self-assembly and applications points of view. We report a novel confinement-free synthesis of chloropropyl-functionalized helical mesoporous silica nanofibers (CP-HMSNFs) possessing straight c…
View article: Graphene-like conjugated <i>π</i> bond system in Pb1−<i>x</i>Sn<i>x</i>Se
Graphene-like conjugated <i>π</i> bond system in Pb1−<i>x</i>Sn<i>x</i>Se Open
Following the identification of the π bond in graphene, in this work, a π bond constructed through side-to-side overlap of half-filled 6pz orbitals was observed in a non-carbon crystal of Pb1–xSnxSe (x ∼ 0.34) (PSS), a prototype topologica…