All articles tagged with #quantum materials
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Caltech researchers have developed a new method to sum all Feynman diagrams for electron-lattice interactions, solving the long-standing polaron problem and enabling more accurate predictions of electron behavior in complex materials, with potential applications in quantum and electronic device design.