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Nematicity

All articles tagged with #nematicity

science1 year ago

New Superconductor Type Confirmed by Experiment

A Yale-led research team has provided strong evidence for a new type of superconductivity linked to electronic nematicity, a phase where particles break rotational symmetry. The study, published in Nature Physics, focused on iron selenide crystals mixed with sulfur, revealing a superconducting gap indicative of nematic fluctuation-driven superconductivity. This breakthrough could lead to new ways of achieving superconductivity without energy loss, advancing fundamental physics research.

via Phys.org|
#iron-selenide#nematicity#quantum-physics
science2 years ago

"MIT Physicists Uncover New Superconductor Switch"

MIT and Argonne scientists have discovered that iron selenide (FeSe) reaches the superconductive state through orbital polarization, not spin polarization like other iron-based superconductors. The discovery opens up a new door to discovering unconventional superconductors and optimizing chalcogenide superconductors for better performance. The team hopes to discover a continuum of materials that go between spin and orbital nematicity, which could enable superconducting at even warmer temperatures, clearing the way for practical applications.

via The Register|
#fese#mit#nematicity
physics2 years ago

Electron behavior in quantum systems revealed by crystal stripes.

Physicists at RIKEN have discovered hidden stripes in a crystal that could help understand the behavior of electrons in certain quantum systems, including high-temperature superconductors. The electrons in most materials interact weakly, but in materials where they interact strongly, they behave as quasiparticles. The team examined a crystal in which a layer of nickel atoms was arranged in a square lattice, and found that the electrons had broken this pattern and were instead aligned in stripes, called nematicity. Such experiments will help physicists test different proposed theories for the behavior of quantum systems with many particle interactions.

via Phys.org|
#crystal#density-wave#electrons