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Magnetic domain walls can exhibit a variety of different spin textures. Chen et al. show that it is possible to switch these textures between left handed, right handed, cycloidal, helical and mixed domain wall structures by controlling uniaxial strain in iron/nickel bilayer thin films on tungsten.

Here, the authors show the emergence of valley-polarized Floquet-Bloch states in 2H-WSe₂ upon below-band-gap driving using circularly polarized light.

Three-dimensional nanofabrication allows for the precise tailoring of curvature of magnetic nanowires, and therefore the local symmetry breaking. Here, Ruiz-Gomez et al use this control to study the interaction of domain walls with local curvature, engineering potential wells and shift registers.

Monolayer graphene has been long proposed as a candidate system for Floquet engineering. Time- and angle-resolved photoemission spectroscopy measurements now show the formation of Floquet–Bloch states in this material.

Bloch oscillations are oscillatory motions of particles in a periodic potential. The observation of fractional Bloch oscillations in a photonic model system by Corrielli and colleagues offers alternative means to study this quantum phenomenon in systems other than natural crystals.

Bloch oscillations—oscillatory motions of wave packets in periodic potentials acting under constant forces—have been observed in semiconductor superlattices and photonic waveguide arrays. Here, the authors extend these ideas to plasmonics to observe Bloch oscillations and discrete diffraction.

Authors predict polar Bloch points with negative capacitance in tensile-strained ultrathin ferroelectric PbTiO₃ film by phase-field simulations, observing their polarization structures by scanning transmission electron microscopic imaging.

Periodic laser light can modify the electronic properties of solids and offers a path to create new material phases. In a topological antiferromagnet, periodic driving with opposite light helicities is now shown to produce distinct Dirac mass gaps.

By forcing electron–hole pairs onto closed trajectories attosecond clocking of delocalized Bloch electrons is achieved, enabling greater understanding of unexpected phase transitions and quantum-dynamic phenomena.

Observation of a Bloch-Siegert shift has remained elusive. Here, Wu et al, reports spin-selective Bloch-Siegert shift in lead halide perovskite quantum dots, and highlights the importance of many-body interactions in correctly modeling the shift.

Synthetic dimensions can introduce band properties without a periodic structure in real space, but they have largely been studied in linear systems. A study using an optical resonator has now shown non-linear soliton states in synthetic frequency space.

There are many possible mechanisms of high-harmonic generation from crystals. Here the authors discuss the role of the Bloch oscillation to nonlinear response of the crystal and harmonic radiation from it.

Photonic crystals (PhCs) are artificial periodic materials that can be used to manipulate the flow of light. Here, the authors report the realization of asymmetric PhCs based on in-plane hyperbolic phonon polaritons in perforated α-MoO₃, showing low-symmetry deep-subwavelength Bloch modes that are robust against lattice rearrangement in specific directions.

The build-up and dephasing of Floquet-–Bloch bands is visualized in both subcycle band-structure videography and quantum theory, revealing the interplay of strong-field intraband and interband excitations in a non-equilibrium Floquet picture.

In three dimensional systems with broken bulk inversion symmetry, skyrmions can form extended string-like structures. Here, Birch et al use scanning transmission x-ray microscopy to demonstrate the current induced generation and motion of these three dimensional skyrmion strings.

The Bloch–Siegert shift—a strong-field phenomenon that implies a failure of the rotating-wave approximation—is observed in the polariton dispersion diagram of a two-dimensional electron gas system inside a high-Q terahertz photonic crystal cavity.

Skyrmions and anti-skyrmions often exist in distinct material systems. Here, the authors observe elliptical skyrmions and anti-skyrmions with opposite topological charges in one tetragonal Heusler compound Mn_1.4Pt_0.9Pd_0.1Sn with D_2d symmetry.

Graphene has a centrosymmetric crystal symmetry, which prohibits second-order effects in transport experiments. Yet, giant second-order nonlinear transports can emerge in graphene moiré superlattices at zero magnetic field, originating from the skew scattering of chiral Bloch electrons in the superlattice and giving rise to both longitudinal and transverse nonlinear conductivities under time-reversal symmetry.

Konrad E. Bloch (1912–2000) — research chemist who outlined the path of cholesterol synthesis.

Hole spin qubits in germanium have seen significant advancements, though improving control and noise resilience remains a key challenge. Here, the authors realize a dressed singlet-triplet qubit in germanium, achieving frequency-modulated high-fidelity control and a tenfold increase in coherence time.

Floquet engineering is often limited by weak light–matter coupling and heating. Now it is shown that exciton-driven fields in monolayer semiconductors produce stronger, longer-lived Floquet effects and reveal hybridization linked to excitonic phases.

Quasi-BICs are known for their high sensitivity to structural disorder, which strongly affects their quality factor. Here, authors introduce quasi-bound flat bands in the continuum — optical states originating from disorder-induced band folding. Their theoretical and experimental results provide a paradigm for designing devices of high-quality factor and broad angular response.

The bulk boundary effects of non-hermitian systems are a burgeoning area of interest with the potential to unveil new and interesting physics. Here, the authors investigate how the non-Hermitian skin effect can drastically affect the emission and absorption quanta and Rabi oscillations in a driven non-Hermitian two-level lattice, which is sustainable even the system possess gain or loss.

A method to coherently manipulate excitons and perform all-optical logic operations using the valley degree of freedom in monolayer WS₂ is discussed.

Most 2D magnets support only a single skyrmion phase. Here, the authors observe two distinct topological phases: Bloch and hybrid skyrmions, with high thermostability in the room-temperature ferromagnet Fe₃GaTe₂.

The fluorooxoborate crystal NH₄B₄O₆F shows promise as a nonlinear optical material for vacuum ultraviolet light sources through second-harmonic generation, demonstrating record output energy and efficiency resulting from optimized arrangements of fluorine-based units creating asymmetric sublattices.

Authors investigate graphene/cobalt and graphene/nickel interfaces, and observe a non-zero Dzyaloshinskii–Moriya interaction that they attribute to the Rashba effect; calculations suggest the effect can be enhanced in van der Waals heterostructures.

Current-driven domain wall propagation in ferromagnetic layers adjacent to normal metals can be very fast, which could recently be explained by their chirality. Here, the authors show means of controlling the magnetic chirality, which opens the possibility to tune the dynamics of domain walls.

In this work, the authors show that photonic topological lattices with dissipative couplings could exhibit non-Abelian dynamics and geometric phases that are in sharp contrast to those arising in typical energy-conserving systems.

Information leaked by a quantum system into its environment causes decoherence but if it is recorded then it can be used to infer the quantum state. Ficheux et al. monitor the relaxation and dephasing of a qubit and show that this allows all three components of the qubit to be probed simultaneously.

Examples of materials with non-trivial band topology in the presence of strong electron correlations are rare. Now it is shown that quantum fluctuations near a quantum phase transition can promote topological phases in a heavy-fermion compound.

How white matter develops along the length of major tracts in humans remains unknown. Here, the authors identify fundamental patterns of human white matter development along distinct axes that reflect brain organization.

Recent studies on topological flat bands and their fractional states have suggested an analogy between moiré flat bands and Landau levels (LLs). Here, the authors describe a family of single component wavefunctions that cannot be written in a form similar to the Laughlin ansatz, implying that moiré flat bands are fundamentally different from LLs and this analogy has fundamental limits.

Here, authors construct a moving potential barrier in a synthetic temporal lattice. They unveil the selection rules for choosing potential moving speed as well as the conditions to achieve transparent moving potentials and refraction.

This work demonstrates superadiabatic topological pumping on photonic chips, achieving a 20-fold device miniaturization and high-efficiency operation across a 650–920 nm bandwidth, paving the way for ultracompact integrated photonic transports.

Using a wafer-scale monolayer 2D MoS₂ process instead of conventional silicon-based devices to manufacture components of spaceborne communication systems demonstrates radiation tolerance, low bit error rate and long-term stability, even under much harsher radiation environments.

Trapping electromagnetic waves within the radiation continuum has significant implications in lasers and sensing. Here the authors achieved a moiré BIC in a photonic crystal slab, demonstrating simultaneous flat-band dispersing and high-Q features within a wide-angle regime.

Magnetic skyrmions typically form hexagonal crystals with either uniquely Bloch or Néel-type textures. Here, a polar magnet EuNiGe₃ is shown to host two skyrmion crystal phases with hexagonal and square structures, and hybrid Bloch-Néel textures.

Frequency modulation is a standard approach for encoding information in, for example radio waves. While there has been a lot of interest in using magnons for information processing, frequency modulation of magnons is relatively unexplored. Here, Xu, Hua, Chen and Yu introduce the concept of synthetic dimensions to manipulate the frequency of magnons.

Known examples of negative refraction in metamaterials do not distinguish between positive and negative angles of incidence. Here, the authors show that it is possible to break this symmetry using an asymmetric unit cell, and demonstrate it using a mechanical metamaterial working at GHz frequencies.

Liu et al. experimentally demonstrate a terahertz chaos source based on a terahertz quantum cascade laser without any external perturbations. It is found that the chaos generation in the terahertz laser is ascribed to the defect-mediated turbulence.