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View article: Coherent terahertz control of metastable magnetization in FePS3
Coherent terahertz control of metastable magnetization in FePS3 Open
The crystal lattice governs the emergent electronic, magnetic, and optical properties of quantum materials, making structural tuning through strain, pressure, or chemical substitution a key approach for discovering and controlling novel qu…
View article: Joint commensuration in moiré charge-order superlattices drives shear topological defects
Joint commensuration in moiré charge-order superlattices drives shear topological defects Open
The advent of two-dimensional moiré systems has revolutionized the exploration of phenomena arising from strong correlations and nontrivial band topology. Recently, a moiré superstructure formed by two coexisting charge density wave (CDW) …
View article: Terahertz control of linear and nonlinear Magno-phononics
Terahertz control of linear and nonlinear Magno-phononics Open
Coherent manipulation of magnetism through the lattice provides opportunities for controlling spintronic functionalities on the ultrafast timescale. Such nonthermal control typically involves nonlinear excitation of Raman-active phonons wh…
View article: 2D van der Waals magnets: from fundamental physics to applications
2D van der Waals magnets: from fundamental physics to applications Open
Magnetism has played a central role in the long and rich history of modern condensed matter physics, with many foundational insights originating from theoretical studies of two-dimensional (2D) spin systems. The discovery of 2D van der Waa…
View article: Automated polarization rotation for multi-axis rotational-anisotropy second harmonic generation experiments
Automated polarization rotation for multi-axis rotational-anisotropy second harmonic generation experiments Open
Rotational anisotropy second harmonic generation (RA-SHG) is a nonlinear optical technique used to probe the symmetry of condensed matter systems. Measuring the dependence of the SHG susceptibility on one or more external parameters, notab…
View article: Light-Induced Reorientation Transition in an Antiferromagnetic Semiconductor
Light-Induced Reorientation Transition in an Antiferromagnetic Semiconductor Open
Because of the lack of a net magnetic moment, antiferromagnets possess a unique robustness to external magnetic fields and are thus predicted to play an important role in future magnetic technologies. However, this robustness also makes th…
View article: Discovery of transient topological crystalline order in optically driven SnSe
Discovery of transient topological crystalline order in optically driven SnSe Open
Ultrafast optical excitation provides a powerful route for accessing emergent quantum phases far from equilibrium, enabling transient light-induced phenomena such as magnetism, ferroelectricity, and superconductivity. However, extending th…
View article: Light-induced reorientation transition in an antiferromagnetic semiconductor
Light-induced reorientation transition in an antiferromagnetic semiconductor Open
Due to the lack of a net magnetic moment, antiferromagnets possess a unique robustness to external magnetic fields and are thus predicted to play an important role in future magnetic technologies. However, this robustness also makes them q…
View article: Large moiré superstructure of stacked incommensurate charge density waves
Large moiré superstructure of stacked incommensurate charge density waves Open
Recent advances in van der Waals heterostructures have opened the new frontier of moiré physics, whereby tuning the interlayer twist angle or adjusting lattice parameter mismatch have led to a plethora of exotic phenomena such as unconvent…
View article: Terahertz field-induced metastable magnetization near criticality in FePS3
Terahertz field-induced metastable magnetization near criticality in FePS3 Open
View article: Direct observation of a photoinduced topological phase transition in Bi-doped (Pb,Sn)Se
Direct observation of a photoinduced topological phase transition in Bi-doped (Pb,Sn)Se Open
Ultrafast photoexcitation offers a novel approach to manipulating quantum materials. One of the long-standing goals in this field is to achieve optical control over topological properties. However, the impact on their electronic structures…
View article: Room-temperature non-volatile optical manipulation of polar order in a charge density wave
Room-temperature non-volatile optical manipulation of polar order in a charge density wave Open
View article: Spontaneous emergence of phonon angular momentum through hybridization with magnons
Spontaneous emergence of phonon angular momentum through hybridization with magnons Open
Chirality, the breaking of improper rotational symmetry, is a fundamental concept spanning diverse scientific domains. In condensed matter physics, chiral phonons, originating from circular atomic motions that carry angular momentum, have …
View article: Terahertz Control of Linear and Nonlinear Magno-Phononics
Terahertz Control of Linear and Nonlinear Magno-Phononics Open
Coherent manipulation of magnetism through the lattice provides unprecedented opportunities for controlling spintronic functionalities on the ultrafast timescale. Such nonthermal control conventionally involves nonlinear excitation of Rama…
View article: Infrared Optical Anisotropy in Quasi‐1D Hexagonal Chalcogenide BaTiSe<sub>3</sub>
Infrared Optical Anisotropy in Quasi‐1D Hexagonal Chalcogenide BaTiSe<sub>3</sub> Open
Polarimetric infrared (IR) detection bolsters IR thermography by leveraging the polarization of light. Optical anisotropy, i.e., birefringence and dichroism, can be leveraged to achieve polarimetric detection. Recently, giant optical aniso…
View article: Dynamical decoding of the competition between charge density waves in a kagome superconductor
Dynamical decoding of the competition between charge density waves in a kagome superconductor Open
View article: Keldysh tuning of photoluminescence in a lead halide perovskite crystal
Keldysh tuning of photoluminescence in a lead halide perovskite crystal Open
In 1964, Keldysh laid the groundwork for strong-field physics in atomic, molecular, and solid-state systems by delineating a ubiquitous transition from multiphoton absorption to quantum electron tunneling under intense AC driving forces. W…
View article: Light-induced insulator–metal transition in Sr <sub>2</sub> IrO <sub>4</sub> reveals the nature of the insulating ground state
Light-induced insulator–metal transition in Sr <sub>2</sub> IrO <sub>4</sub> reveals the nature of the insulating ground state Open
Sr 2 IrO 4 has attracted considerable attention due to its structural and electronic similarities to La 2 CuO 4 , the parent compound of high- T c superconducting cuprates. It was proposed as a strong spin–orbit-coupled J eff = 1/2 Mott in…
View article: Superconductivity and Pronounced Electron‐Phonon Coupling in Rock‐Salt Al<sub>1−<i>x</i></sub>O<sub>1−<i>x</i></sub> and Ti<sub>1−<i>x</i></sub>O<sub>1−<i>x</i></sub>
Superconductivity and Pronounced Electron‐Phonon Coupling in Rock‐Salt Al<sub>1−<i>x</i></sub>O<sub>1−<i>x</i></sub> and Ti<sub>1−<i>x</i></sub>O<sub>1−<i>x</i></sub> Open
The highest ambient‐pressure Tc among binary compounds is 40 K (MgB2). Higher Tc is achieved in high‐pressure hydrides or multielement cuprates. Alternatively, are explored superconducting properties of binary, metastable sub‐oxides, that …
View article: Coexistence of Interacting Charge Density Waves in a Layered Semiconductor
Coexistence of Interacting Charge Density Waves in a Layered Semiconductor Open
Coexisting orders are key features of strongly correlated materials and underlie many intriguing phenomena from unconventional superconductivity to topological orders. Here, we report the coexistence of two interacting charge-density-wave …
View article: Direct observation of Floquet-Bloch states in monolayer graphene
Direct observation of Floquet-Bloch states in monolayer graphene Open
Floquet engineering is a novel method of manipulating quantum phases of matter via periodic driving [1, 2]. It has successfully been utilized in different platforms ranging from photonic systems [3] to optical lattice of ultracold atoms [4…
View article: Time-of-flight detection of terahertz phonon-polariton
Time-of-flight detection of terahertz phonon-polariton Open
A polariton is a fundamental quasiparticle that arises from strong light-matter interaction and as such has attracted wide scientific and practical interest. When light is strongly coupled to the crystal lattice, it gives rise to phonon-po…
View article: Current rectification based on noncentrosymmetric quantum materials
Current rectification based on noncentrosymmetric quantum materials Open
Rectification is a process that converts electromagnetic fields into direct current (DC). Such a process underlies a wide range of technologies, including wireless communication, wireless charging, energy harvesting, and infrared detection…
View article: Dynamical decoding of the competition between charge density waves in a kagome superconductor
Dynamical decoding of the competition between charge density waves in a kagome superconductor Open
The kagome superconductor CsV$_3$Sb$_5$ hosts a variety of charge density wave (CDW) phases, which play a fundamental role in the formation of other exotic electronic instabilities. However, identifying the precise structure of these CDW p…
View article: Distinct Optical Excitation Mechanisms of a Coherent Magnon in a van der Waals Antiferromagnet
Distinct Optical Excitation Mechanisms of a Coherent Magnon in a van der Waals Antiferromagnet Open
The control of antiferromagnets with ultrashort optical pulses has emerged as a prominent field of research. Tailored laser excitation can launch coherent spin waves at terahertz frequencies, yet a comprehensive description of their genera…
View article: Delamination-Assisted Ultrafast Wrinkle Formation in a Freestanding Film
Delamination-Assisted Ultrafast Wrinkle Formation in a Freestanding Film Open
Freestanding films provide a versatile platform for materials engineering thanks to additional structural motifs not found in films with a substrate. A ubiquitous example is wrinkles, yet little is known about how they can develop over as …
View article: Room-temperature non-volatile optical manipulation of polar order in a charge density wave
Room-temperature non-volatile optical manipulation of polar order in a charge density wave Open
Utilizing ultrafast light-matter interaction to manipulate electronic states of quantum materials is an emerging area of research in condensed matter physics. It has significant implications for the development of future ultrafast electron…
View article: Direct observation of the collective modes of the charge density wave in the kagome metal CsV <sub>3</sub> Sb <sub>5</sub>
Direct observation of the collective modes of the charge density wave in the kagome metal CsV <sub>3</sub> Sb <sub>5</sub> Open
A recently discovered group of kagome metals AV Sb (A = K, Rb, Cs) exhibit a variety of intertwined unconventional electronic phases, which emerge from a puzzling charge density wave phase. Understanding of this charge-ordered parent…
View article: Probing charge order of monolayer NbSe$_2$ within a bulk crystal
Probing charge order of monolayer NbSe$_2$ within a bulk crystal Open
Atomically thin transition metal dichalcogenides can exhibit markedly different electronic properties compared to their bulk counterparts. In the case of NbSe$_2$, the question of whether its charge density wave (CDW) phase is enhanced in …
View article: Spin-mediated shear oscillators in a van der Waals antiferromagnet
Spin-mediated shear oscillators in a van der Waals antiferromagnet Open