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The formation of an excitonic Mott insulator state in a moirΓ© superlattice

27 November 2023 at 14:10
When a negatively charged electron and a positively charged hole in a pair remain bound together following excitation by light, they produce states known as excitons. These states can influence the optical properties of materials, in turn enabling their use for developing various technologies.

Physicists find evidence of exotic charge transport in quantum material

23 November 2023 at 19:00
True to form, a "strange metal" quantum material proved strangely quiet in recent quantum noise experiments at Rice University. Published this week in Science, the measurements of quantum charge fluctuations known as "shot noise" provide the first direct evidence that electricity seems to flow through strange metals in an unusual liquidlike form that cannot be readily explained in terms of quantized packets of charge known as quasiparticles.

Three-pronged approach discerns qualities of quantum spin liquids

16 November 2023 at 20:31
In 1973, physicist Phil Anderson hypothesized that the quantum spin liquid, or QSL, state existed on some triangular lattices, but he lacked the tools to delve deeper. Fifty years later, a team led by researchers associated with the Quantum Science Center headquartered at the Department of Energy's Oak Ridge National Laboratory has confirmed the presence of QSL behavior in a new material with this structure, KYbSe2.

Unlocking the secrets of spin with high-harmonic probes

10 November 2023 at 19:00
Deep within every piece of magnetic material, electrons dance to the invisible tune of quantum mechanics. Their spins, akin to tiny atomic tops, dictate the magnetic behavior of the material they inhabit. This microscopic ballet is the cornerstone of magnetic phenomena, and it's these spins that a team of JILA researchersβ€”headed by JILA Fellows and University of Colorado Boulder professors Margaret Murnane and Henry Kapteynβ€”has learned to control with remarkable precision, potentially redefining the future of electronics and data storage.

From supersolid to microemulsion: Exploring spin-orbit coupled Bose-Einstein condensates

6 November 2023 at 15:00
In a new study, researchers from the University of California, Santa Barbara, (UCSB) have reported the discovery of a spin microemulsion in two-dimensional systems of spinor Bose-Einstein condensates, shedding light on a novel phase transition marked by the loss of superfluidity, complex pseudospin textures, and the emergence of topological defects.

Simulating spins, spirals and shrinking devices for new classes of energy-efficient materials

30 October 2023 at 17:19
The diamond in an engagement ring, the wonder-material graphene and the lead in a humble pencil are all formed from carbon, but display profoundly different characteristics. Carbon materials such as these are among the most famous examples of how diverse properties can emerge in materials, based only on the rearrangement of the structure of atoms.

Theoretical modeling illuminates a new nonlinear Hall Effect

30 October 2023 at 16:34
An international team of researchers including a team from the Center for the Advancement of Topological Semimetals (CATS), an Energy Frontier Research Center under the U.S. Department of Energy's Office of Science led by Ames National Laboratory, experimentally demonstrated a new type of nonlinear Hall effect. This Hall effect is driven by the quantum metric, which defines the distances between electronic wavefunctions inside a crystal.

New algorithms inspired by quantum computing for simulating polymeric materials

27 October 2023 at 15:33
The advent of quantum computing is opening previously unimaginable perspectives for solving problems deemed beyond the reach of conventional computers, from cryptography and pharmacology to the physical and chemical properties of molecules and materials. However, the computational capabilities of present-day quantum computers are still relatively limited.

A deep look into the dipolar quantum world

27 October 2023 at 15:23
In a new collaboration, two research groups, one led by Francesca Ferlaino and one by Markus Greiner, have joined force to develop an advanced quantum gas microscope for magnetic quantum matter. This state-of-the-art instrument reveals intricate dipolar quantum phases shaped by the interactions as reported in Nature.