:NOTE Most electronics waste energy as heat. Every data centre, every phone, every MRI scanner loses a fraction of every electron to resistance. Superconductivity eliminates that loss entirely: below a critical temperature, certain materials conduct electricity with zero resistance, zero heat, zero waste. The catch has always been that these materials need extreme cooling, near absolute zero, making them expensive and impractical for everyday use. A team at Chalmers University of Technology in Sweden :INFO What They Actually Did The Chalmers team, led by professor Floriana Lombardi, took a thin film of YBCO (yttrium barium copper oxide, the workhorse of high-temperature superconductor research) and grew it on a substrate of magnesium oxide. The film itself was only a few nanometres thick: less than one millionth the width of a human hair. Rather than searching for a new material or tweaking the chemistry, they sculpted the substrate itself at the nanoscale, etching a regular pattern of tiny ridges and valleys before deposition. When YBCO grows on that textured surface, the atoms settle differently. The interface between the two layers creates an electronic landscape that lets superconductivity survive at higher temperatures than a flat substrate allows, and crucially, it persists even when strong magnetic fields are applied. Magnetic fields ordinarily kill superconductivity in thin films. That this technique defeats them is the headline result. The technique is described as a new design principle: instead of :STATS :CHECKLIST Seven things superconductivity could transform [ ] - Data centres and AI. Every GPU cluster, training run and inference call loses energy to resistive heat. Superconducting interconnects and processors could cut data centre electricity use sharply, just as AI pushes grid demand to record levels. [ ] - MRI scanners. Today's machines already use superconducting magnets cooled to near absolute zero with liquid helium. If they ran at higher temperatures with simpler cooling, MRI becomes far more accessible to smaller hospitals and remote clinics. [ ] - Maglev and rail transport. The fastest trains, including Japan's SCMaglev record of 603 km/h, rely on superconducting magnets. Cheaper, higher-temperature materials could make maglev viable on routes currently ruled out by cooling costs. [ ] - Quantum computers. Every superconducting quantum computer (IBM, Google, IQM) runs its qubits near absolute zero. Better high-temperature superconductors reduce the engineering burden of keeping those systems cold, making scale-up more tractable. [ ] - Power grids. Superconducting cables lose no energy in transmission. Replacing even a fraction of the world's long-distance lines would eliminate enormous waste, which matters more as grids carry renewable energy from remote sites. [ ] - Particle accelerators. Jefferson Lab, CERN and every major physics facility depends on superconducting radiofrequency cavities to accelerate particles. More robust, higher-temperature materials reduce operating costs for fundamental research. [ ] - Medical devices and sensors. Beyond MRI, superconducting quantum interference devices (SQUIDs) are the most sensitive magnetic detectors known, used in brain scanning, mineral exploration and submarine detection. Better materials make them cheaper. :NOTE.half The YBCO critical temperature (already a record-holder among practical superconductors) is around 93 Kelvin, minus 180 Celsius. The new substrate technique raises the effective working temperature further. Room temperature is 293 Kelvin. The gap is still large, but the direction is the right one. | :NOTE.half Funding came from the Swedish Research Council, the Knut and Alice Wallenberg Foundation, the European Union EIC Pathfinder programme, and the German Research Foundation (DFG). This is foundational science, not a commercial product, and the research group is not selling anything. :QUOTE [quotetype:plain, subtitle:Professor Floriana Lombardi] Instead of searching for entirely new materials or manipulating the chemical properties of existing ones, we are now showing how superconductivity can be enhanced by sculpting the substrate. :INFO Why This Matters More Than Most Physics Papers Physics journals publish breakthroughs constantly, and most of them take decades to reach products. This one matters for a specific reason: it is a technique, not a compound. New materials require fresh supply chains, regulatory clearance, and manufacturing investment. A new substrate engineering approach can, in principle, be applied to YBCO and other superconductors that are already manufactured at scale. The research group can share the technique. Other labs can reproduce it. Industry partners can licence it. That adoption pathway is much shorter than the one for a brand new exotic material. It also arrives at the right moment. AI infrastructure is creating the largest sustained surge in electricity demand since industrial electrification. Any technology that reduces the energy cost of computation is economically valuable, not in theory but right now, in the market, in 2026. The honest caveat: the path from a nanometres-thin film in a university lab to a manufacturable superconduc :NOTE The paper title is "Boosting superconductivity in ultrathin YBa2Cu3O7-d films via nanofaceted substrates" and is available in Nature Communications, June 2026. The lead author is Floriana Lombardi; co-authors include Thilo Bauch and colleagues at Chalmers. Replication attempts by independent groups will determine how quickly this moves into applied research programmes. :LINK https://www.chalmers.se/en/current/news/mc2-superconductor-advance-could-unlock-ultra-energy-efficient-electronics/ Chalmers University: Superconductor advance could unlock ultra-energy-efficient electronics :LINK https://scitechdaily.com/superconductivity-breakthrough-could-unlock-ultra-efficient-electronics/ SciTechDaily: Superconductivity breakthrough, June 2026