Ultrasound Study Uncovers Tetracritical Point in UTe2

Researchers at Cornell University, in collaboration with a QMC team, have demonstrated that UTe₂ can simultaneously host two distinct superconducting states, strengthening its promise as a candidate topological superconductor. Using precision ultrasound measurements under pressure, the team mapped the material’s superconducting phase diagram and identified a region where the two states coexist and compete.  The work was recently published in Nature Physics and highlighted in this news article.