Physical world and mathematics

Moiré exciton

A moiré exciton is an exciton trapped by the periodic moiré potential that forms when two atomically thin semiconductor layers are stacked with a small twist angle or lattice mismatch.

Moiré excitons in twisted transition-metal dichalcogenides

Moiré excitons are excitons trapped and reshaped by the moiré superlattice formed when two atomically thin transition metal dichalcogenide layers are stacked at a small twist angle.

Moiré ferroelectricity is electrically switchable spontaneous polarization that emerges in moiré superlattices of twisted two-dimensional van der Waals crystals such as graphene and boron nitride, first demonstrated in bilayer graphene in 2020.

Moiré flat band

A moiré flat band is a nearly flat electronic band formed when two atomically thin crystal layers are stacked with a small twist angle, making electron interactions dominant.

Moiré Hubbard model

The moiré Hubbard model is a lattice model of interacting electrons on triangular moiré lattices in twisted semiconductor bilayers, generalizing the Hubbard model with strong, tunable spin-orbit coupling.

Moiré Hubbard model simulations in twisted TMD homobilayers

Moiré Hubbard model simulations in twisted TMD homobilayers use methods like DMFT and DMRG to predict Mott transitions and superconductivity in twisted WSe2 and MoTe2, checked against experiment.

Moiré interferometry

Moiré interferometry is a high-sensitivity optical method for measuring in-plane displacement and strain on a specimen surface, applied to composite materials, fracture mechanics, biomechanics, and deformation of electronic packages.

Moiré magnetism

Moiré magnetism is the study of magnetic phases that arise when a moiré pattern, formed by twisted or lattice-mismatched 2D layers, modifies magnetism in materials such as CrI3 and graphene.

Moiré materials

Moiré materials are artificial quantum materials built by twisting stacked atomically thin crystals, creating a moiré superlattice whose flat bands host superconductivity and topological states.

Moiré Mott insulator

A moiré Mott insulator is a Mott insulating state in moiré materials, where flat bands from twisted atomically thin layers make Coulomb repulsion dominate over kinetic energy.

Moiré pattern

A moiré pattern, or moiré effect, is a large-scale interference pattern that appears when two repetitive structures, such as line gratings or grids, overlap with slightly different spacing or alignment.

Moiré photonics

Moiré photonics is the branch of optics in which twisted or mismatched periodic photonic lattices create long-wavelength superstructures used to engineer optical bands and localize light.

Moiré quantum simulation

Moiré quantum simulation uses stacked and twisted two-dimensional materials, whose moiré interference pattern forms an artificial lattice, to simulate strongly correlated quantum models such as the Hubbard model.

Moiré quantum simulator

A moiré quantum simulator is a stack of twisted or lattice-mismatched atomically thin crystals whose moiré superlattice acts as a solid-state analog computer for the Hubbard model.

Moiré superconductivity

Moiré superconductivity is superconductivity arising when two-dimensional materials are stacked with small twist angles, creating flat electronic bands; it was first demonstrated in magic-angle twisted bilayer graphene in 2018.

Moiré superlattice

A moiré superlattice is a long-wavelength periodic structure formed when two atomically thin layers are stacked with a small twist angle or slight lattice mismatch, studied in twistronics.

Moiré superlattices in twisted bilayer graphene

A moiré superlattice in twisted bilayer graphene is the long-wavelength periodic structure formed when two graphene layers are stacked at a small twist angle of about a degree.

Moissanite

Moissanite is the naturally occurring mineral form of silicon carbide, named for Nobel laureate Henri Moissan; extremely rare in nature, it is grown in labs as a diamond simulant.

Moist static energy

Moist static energy (MSE) is a thermodynamic quantity of moist air, the sum of enthalpy, gravitational potential energy, and latent heat of water vapor, conserved in reversible adiabatic processes and widely used to study tropical convection.

Moisture-swing CO2 capture

Moisture-swing CO2 capture is a direct air capture method in which an anion-exchange resin binds carbon dioxide when dry and releases it when humid, using humidity as the switching variable.

Oct 20, 2026

Mojanda

Mojanda (Volcan Mojanda-Fuya Fuya) is an extinct 4,263 m volcanic complex in Ecuador's Interandean Depression near Otavalo, formed by two contemporaneous volcanoes with calderas, three summit lakes, and no confirmed Holocene eruptions.

Sep 21, 2026

Mojib Latif

Mojib Latif, born 1954 in Hamburg, is a German physical oceanographer and climatologist at GEOMAR Kiel whose influential work on decadal climate prediction earned the German Environmental Prize in 2015.

Oct 10, 2026

Mojżesz Presburger

Mojżesz Presburger (1904–1943) was a Polish student of mathematics who proved in 1929 that arithmetic with addition but no multiplication is decidable, a result now known as Presburger arithmetic.

Molality

Molality, symbol b, is a measure of concentration defined as moles of solute per kilogram of solvent, used mainly for colligative properties like freezing point depression.

Molar concentration

Molar concentration, formally called amount concentration or amount-of-substance concentration, is the amount of a constituent in moles divided by the volume of the mixture, commonly given in mol/L.

Molar conductivity

Molar conductivity (Λ) is an electrolyte solution's conductivity divided by its molar concentration, Λ = κ/c, expressing the conducting power contributed by one mole of electrolyte.

Molar mass

Molar mass, also called molar weight, is the mass of one mole of a substance, measured in g/mol and used to convert between mass and moles.

Molar volume

Molar volume is the volume occupied by one mole of a substance, defined as volume divided by amount of substance. For an ideal gas at 0 °C it is about 22.4 liters per mole.

Molasse

Molasse, introduced by Bernhard Studer in 1825, is a geology term for the thick sandstone and conglomerate sediments that fill foreland basins beside rising mountain chains.