By Dr. Tim Sandle
SCIENCE EDITOR
DIGITAL JOURNAL
April 11, 2026
Superconductor. Image by Tim Sandle
A strange new kind of superconductivity has been discovered in uranium ditelluride (UTe2). Here, electricity flows with zero resistance (albeit only under extremely strong magnetic fields that should normally destroy it). Uranium ditelluride is an unconventional spin-triplet superconductor with remarkable resilience to magnetic fields and potential applications in quantum computing.
Superconductors are materials that exhibit zero electrical resistance and expel magnetic fields when cooled below a certain critical temperature, allowing for highly efficient electrical conduction. Superconductors are crucial for quantum computing because they enable the creation of qubits, which are the fundamental units of quantum information.
Strangely, with the new finding, the superconductivity disappears at first and then dramatically reappears at even higher fields, earning it the nickname the “Lazarus phase.”
Lazarus of Bethany is a mythical figure of the Biblical New Testament, a figure whose life is restored by Jesus four days after his death, as told in the Gospel of John.
Researchers from Rice University successfully uncovered and subsequently explained an unusual form of superconductivity that only appears under extremely strong magnetic fields.
Why Are Superconductors Important?
Superconductors are crucial due to their ability to conduct electricity without resistance, leading to significant advancements in energy efficiency, medical technology, and high-speed transportation.Medicine: Superconductors are used in Magnetic Resonance Imaging (MRI) machines, where they create strong magnetic fields necessary for high-resolution imaging of internal organs.
Energy Transmission: Superconducting cables can transmit electricity over long distances with minimal energy loss, significantly enhancing the efficiency of power grids.
Transportation: Maglev trains, which use superconducting magnets, can float above tracks, reducing friction and allowing for faster travel.
Quantum Computing: Superconductors are integral to the development of qubits, the basic units of quantum computers, enabling unprecedented computational power.
Particle Accelerators: Superconducting materials are used in particle accelerators like the Large Hadron Collider, allowing for the acceleration of particles to near-light speeds.
Coventionally, magnetic fields disrupt superconductors. Even relatively modest fields tend to weaken superconductivity, while stronger ones usually eliminate it entirely once a critical limit is reached.
UTe2 breaks this rule. In 2019, scientists discovered that it can remain superconducting in magnetic fields hundreds of times stronger than what typical materials can withstand.
A Superconducting “Resurrection” at Extreme Fields
This strange behaviour quickly drew attention across the physics community. In UTe2, superconductivity disappears below 10 Tesla, which is already an extremely strong field, but unexpectedly returns at field strengths above 40 Tesla.
A Tesla (T) is the SI unit of magnetic flux density, representing the strength of a magnetic field, defined as one weber per square meter (a weber is a smaller unit of magnetic flux).
It transpires this phase depends strongly on the angle between the magnetic field and the material’s crystal structure. The measurements by the scientists showed that the superconducting region forms a toroidal, or doughnutlike, shape that surrounds a particular axis within the crystal.
The measurements revealed a three-dimensional superconducting halo that wraps around the hard b-axis of the crystal.
Experiments confirmed that superconductivity changes with the direction of the magnetic field. An experimental model showed how orientation plays a crucial role in whether superconductivity survives or returns in UTe2.
In terms of what is happening, the researchers propose that some phenomenon is causing electrons to pair into Cooper pairs.
Cooper pairs are pairs of electrons that are bound together at low temperatures, playing a crucial role in the phenomenon of superconductivity.
The next stage of the research revealed that Cooper pairs in this material behave as if they carry angular momentum, similar to a spinning object. When a magnetic field is applied, it interacts with this motion, creating a directional effect that produces the observed halo pattern. This insight helps explain how magnetism and superconductivity can coexist in materials with strong directional properties like UTe2 – a ‘metamagnetic transition’.
Subsequently scientists are now debating what causes this metamagnetic transition and how it influences superconductivity.
The research appears in the journal Science, titled “High-field superconducting halo in UTe 2.”









