Tag

Quantum Materials

All articles tagged with #quantum materials

innovation16 days ago•11 min saved

Switchable quantum material promises real-time control for future chips

US researchers identify a nickel sulfide compound, KxNi4S2, that reversibly switches between Dirac-cone and flat-band quantum states by electrically tuning potassium content, enabling real-time control of electron speed and flow. Demonstrated at Argonne's Center for Nanoscale Materials and Advanced Photon Source, the work could simplify device design and boost future chip and sensor performance; the study was published in Matter.

via Interesting Engineering|

#chip-technology #dirac-cones #flat-bands

science1 month ago•4 min saved

Graphene Excitons Stop Flow, Hinting at a New Quantum Phase

Scientists using graphene bilayers under a strong magnetic field observed excitons behaving as a superfluid at high density, but as density decreases the excitons halt and the material becomes insulating; heating restores the superfluid, a result that could point to a supersolid-like excitonic state or another unusual quantum phase, though measurements are not yet definitive.

via Indian Defence Review|

#excitons #graphene #quantum-materials

science2 months ago•5 min saved

Gravity-like quantum geometry steers electrons, hinting at faster electronics

Researchers at the University of Geneva and collaborators observed the quantum metric—a hidden geometric feature at the SrTiO3/LaAlO3 oxide interface—that distorts electron trajectories under strong magnetic fields, bending them like gravity bends light. This experimental confirmation of a long-theorized quantum geometry could improve understanding of material properties and enable faster, more efficient electronics and advances in quantum technologies, including terahertz devices and superconductivity.

via ScienceDaily|

#electron-dynamics #gravity-like-bending #quantum-materials

science2 months ago•7 min saved

Laser flips magnetism in twisted 2D material, enabling light-defined circuits

Researchers demonstrated optical, non-thermal control of magnetism in a twisted bilayer MoTe2; a laser pulse reversibly flips the ferromagnetic polarity, with switching dynamics tied to whether electrons reside in a topological insulating or metallic state. This links topology and magnetism in a single platform and suggests future possibilities for light-written topological circuits and tiny interferometers on chips.

via SciTechDaily|

#laser #magnetism #moire-materials

science3 months ago•3 min saved

Breakthrough in 30-Year Superconductivity Mystery

New research applying shear strain to ultrathin crystals of strontium ruthenate (Sr₂RuO₄) found that its superconducting transition temperature remains almost unchanged, challenging previous theories and suggesting a simpler, one-component superconducting state. This study refines understanding of the material's hidden symmetry and opens new avenues for exploring unconventional superconductors.

via SciTechDaily|

#phase-transitions #quantum-materials #science

science3 months ago•3 min saved

Einstein's Geometry: How It Shapes Electron Movement in Chips

Scientists at UNIGE have discovered a hidden quantum geometry within materials that influences electron paths similarly to gravity bending light, opening new possibilities for advanced electronics and quantum technology. This finding, observed at the interface of specific oxides, challenges previous assumptions and could lead to breakthroughs in high-frequency electronics, superconductivity, and light-matter interactions.

via SciTechDaily|

#electron-paths #future-electronics #quantum-geometry

science5 months ago•7 min saved

MIT Researchers Confirm Unconventional Superconductivity in Magic-Angle Graphene

MIT physicists have provided the most direct evidence yet of unconventional superconductivity in magic-angle twisted trilayer graphene (MATTG), revealing a distinct superconducting gap that suggests a different pairing mechanism than traditional superconductors, potentially paving the way for room-temperature superconductivity and advanced quantum technologies.

via MIT News|

#graphene #mit #quantum-materials

science5 months ago•3 min saved

Light-Induced Non-Reciprocal Magnetism Challenges Traditional Physics

Researchers from Japan have theoretically demonstrated that shining specific light on magnetic metals can induce non-reciprocal magnetic interactions that effectively violate Newton's third law, leading to a novel chiral phase with persistent rotation, opening new avenues in non-equilibrium materials science and potential technological applications.

via Phys.org|

#light-induced-phase-transition #magnetism #non-reciprocal-interactions

science5 months ago•2 min saved

Revolutionary Light-Based Techniques Transforming Quantum and Material Science

Researchers have achieved a breakthrough in high-order harmonic generation using topological insulators and nanostructures, enabling the production of both even and odd terahertz frequencies, which could revolutionize terahertz technology for communications, imaging, and quantum computing.

via ScienceDaily|

#harmonic-generation #nanostructures #quantum-materials

science5 months ago•3 min saved

Electrons in Kagome Crystals Exhibit Geometry-Driven Quantum Coherence

Physicists have discovered that electrons in Kagome crystals can synchronize and produce a collective quantum 'song' that is influenced by the crystal's shape, revealing a new way to control quantum states through geometry, with potential implications for future material design.

via Phys.org|

#electron-synchronization #kagome-crystals #material-geometry

science-and-technology5 months ago•5 min saved

Factors Influencing the Scaling of Quantum Materials

MIT researchers developed a framework to evaluate the commercial potential of quantum materials by considering their quantum properties, cost, and environmental impact, identifying promising sustainable materials for future applications in electronics, energy, and medicine.

via MIT News|

#cost-analysis #environmental-impact #quantum-materials

science6 months ago•6 min saved

Innovative Tool Boosts AI-Driven Material Breakthroughs

MIT researchers developed SCIGEN, a tool that guides AI models to generate new quantum materials with specific geometric structures, leading to the discovery of two novel compounds and accelerating the search for materials crucial for quantum computing and other advanced technologies.

via MIT News|

#ai #generative-models #materials-science

science7 months ago•2 min saved

Mathematical Trick Reveals Topological Magnetization in Quantum Materials

A new study extends the Středa formula to non-equilibrium driven quantum systems, revealing that a 'sum of zeros' mathematically encodes a universal, quantized topological magnetic response, with implications for understanding exotic phases in quantum materials.

via Phys.org|

#cesaro-summation #floquet-systems #quantum-materials

science7 months ago•2 min saved

Hidden Symmetries Enable Advanced Light Control in Quantum Materials

Researchers have discovered that nonsymmorphic symmetry in quantum materials like nodal-line semimetals suppresses even-order optical responses and enables polarization-dependent light emission patterns, opening new avenues for ultrafast lightwave-based devices and quantum technologies.

via Phys.org|

#light-control #nonlinear-optics #quantum-materials

science8 months ago•5 min saved

Scientists Observe Phonon Angular Momentum in Chiral Crystals

Scientists have experimentally observed phonon angular momentum in chiral crystals for the first time using a novel cantilever-based measurement system, revealing how thermal gradients induce mechanical torques related to quantum lattice vibrations, with potential implications for quantum technology development.

via Phys.org|

#chiral-crystals #experimental-physics #phonon-angular-momentum