Articles tagged with Mott Insulators
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A team of researchers has observed counterflow superfluidity in a two-component Mott insulator for the first time, providing key evidence for this novel quantum state. The study uses ultracold atomic quantum simulation to explore rich quantum modulation and observational techniques.
Scientists at National University of Singapore have created electron-hole crystals in an exotic quantum material, paving the way for advancements in computing technologies. The breakthrough was achieved using scanning tunneling microscopy and reveals two distinct ordered patterns at different energy levels.
A new theory explains why one type of Mott insulator resists conducting electricity even with added electrons. The material's lattice structure interacts with trapped electronic charge to form bipolarons, acting as roadblocks for electron movement.
A new atomically-thin material has been discovered that can switch between an insulating and conducting state by controlling the number of electrons. This property makes it a promising candidate for use in electronic devices such as transistors.
Scientists used new instrumentation to study the chiral magnetic ordering of Cu2OSeO3, revealing helical and conical magnetic modulations. This discovery enables novel investigations of polar magnetic textures with high spatial resolution and short time scales.
Researchers improved the Kitaev spin liquid model by freezing electrons in space, allowing only spin contributions at low temperatures. The study successfully explained experimental data and predicted a topological phase in the presence of an external magnetic field.
A novel quantum simulation method clarifies the correlated properties of complex material 1T-TaS2. The study reveals that the insulating behavior stems from a complex interplay between bonding-antibonding splittings and electronic correlation.
Researchers at University of Illinois discover key connection between symmetry and Mott physics, providing new insight into high-temperature superconductivity. They found that breaking a hidden symmetry destroys Fermi liquids, implying that all models of Mott insulators must break this particle-hole symmetry.
A team of Boston College researchers has discovered a dramatic re-arrangement of magnetic domains with thermal cycling in a Mott insulator. They used spin-polarized scanning tunneling microscopy to map the local strength of antiferromagnetic ordering on nanometer length scales.
A team of researchers from Tohoku University discovered a unique, purely two-dimensional Mott insulator phase that is extremely robust against various perturbations such as heating. This breakthrough has significant implications for realizing monolayer charge-density wave-Mott insulator-based devices operating at room temperatures.
Researchers exactly solve a representative model of the cuprate problem, explaining Cooper pairing and wave function for superconducting state in doped Mott insulators. The solution reveals that superconductivity exists and its properties differ drastically from standard BCS theory.
Researchers developed a charge model to describe photoexcited states of one-dimensional Mott insulators, enabling the calculation of large-system optical conductivity spectra. The study reveals that charge fluctuation is essential for describing photoexcited states and demonstrates the effectiveness of the charge model.
A team of researchers from Boston College, MIT, and UC Santa Barbara has discovered an elusive atomic-scale magnetic signal in a Mott insulator material as it undergoes a transition from insulator to metal. The study uses spin-polarizing scanning tunneling microscopy to detail the underlying physics at the atomic level.
Researchers developed a graphene device that can switch between superconducting and insulating states, allowing for the study of exotic quantum physics. The device, made of three atomically thin layers of graphene, exhibits unique properties such as high-temperature superconductivity and Mott insulator behavior.
Researchers found that light pulses can induce eta pairing in Mott insulators, turning them into superconductors. This unconventional type of conductivity arises from repulsive interactions between electrons and is believed to take place under non-equilibrium conditions.
A University of Illinois team found that twisted bilayer graphene exhibits a Wigner crystal, not a Mott insulator, by injecting electrons into the material. This discovery holds promise for room-temperature superconductors and other groundbreaking applications.
Researchers have found that graphene can be tuned to behave as an insulator or a superconductor, exhibiting unusual electronic properties. By creating a 'superlattice' of stacked graphene sheets, the team demonstrated intrinsic superconductivity in pure carbon-based material.
Scientists have confirmed novel theoretical work on Mott insulators, revealing a unique form of magnetism that arises when these materials are cooled below a critical temperature. This discovery helps to shed light on the complex interactions between electrons in these materials, which are crucial for developing new electronic devices.
Researchers at Boston College manipulate a compound of strontium, iridium and oxygen into the metallic regime by substituting ruthenium metal ions. Scanning tunneling microscopy reveals the emergence of charge carriers, forming minute metallic puddles that coalesce to form a metal across which charges freely flow.
Physicists have discovered a new copper-based compound that exhibits properties never seen before in a superconductor. The material can be made to conduct electricity with or without electrons, offering a new path to studying the relationship between these two methods of creating superconductors.
Scientists have confirmed a long-standing mystery in high-temperature superconductors: lightly doped Mott insulators remain insulators. Strong electron interaction is the key to understanding this phenomenon. The research was funded by the National Science Foundation.
Researchers find high-temperature superconductors break Pauli principle due to linked high- and low-energy scales. Strong electron interactions cause mixing of energy levels, affecting renormalization and spectral features.
Scientists have successfully created a crystal of atoms and observed a quantum phase transition, shedding light on fundamental problems in solid-state physics, quantum optics, and atomic physics. By increasing the strength of a microscopic lattice, researchers induced a transition from a superfluid phase to an insulating Mott phase.