Rice University Physicists Solve the Mystery of the Lazarus Phase in Rare Uranium Superconductor

Rice University scientists explain how UTe2 superconductivity dies and returns as a 3D halo under extreme 40 Tesla magnetic fields.

By: AXL Media

Published: Apr 10, 2026, 10:45 AM EDT

Source: Information for this report was sourced from Science Daily

Defying the Conventional Limits of Magnetism

The traditional understanding of superconductivity suggests that magnetic fields act as a destructive force, tearing apart the electron pairs that allow electricity to flow without resistance. However, a collaborative study led by Rice University has identified a remarkable exception in the material uranium ditelluride, known as UTe2. While typical superconductors fail under modest magnetic pressure, UTe2 exhibits a resilient property that allows it to maintain its state in environments hundreds of times more intense than standard limits. This discovery challenges long held physics principles and suggests that certain materials possess hidden phases that only activate under the most extreme cosmic conditions.

The Emergence of the Lazarus Phase

The most startling aspect of the research is the discovery of what scientists have nicknamed the Lazarus phase. In experimental settings, the superconductivity in UTe2 is first suppressed as expected when magnetic fields reach approximately 10 Tesla. However, as the field strength continues to climb toward 40 Tesla, the zero resistance state unexpectedly returns. Physicist Andriy Nevidomskyy expressed astonishment at this reemergence, noting that the revival is highly dependent on the specific orientation of the magnetic field relative to the crystal structure. This "resurrection" represents a rare instance where increasing a traditionally disruptive force actually restores a quantum state.

Mapping the Three Dimensional Superconducting Halo

Detailed measurements conducted by teams at NIST and the University of Maryland revealed that this high field superconductivity does not occur uniformly. Instead, it forms a toroidal, or doughnut like, halo that wraps around a specific axis of the crystal. This three dimensional structure explains why the Lazarus phase only appears at very narrow angles. According to researcher Sylvia Lewin, this geometric halo is a beautiful and surprising physical manifestation of quantum mechanics, providing a visual map of where the material's electrons are able to pair up despite the overwhelming magnetic interference surrounding them.