{"id":307070,"date":"2025-07-31T16:57:24","date_gmt":"2025-07-31T16:57:24","guid":{"rendered":"https:\/\/www.europesays.com\/uk\/307070\/"},"modified":"2025-07-31T16:57:24","modified_gmt":"2025-07-31T16:57:24","slug":"new-phase-of-quantum-matter-will-result-in-big-tech-advances-earth-com","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/uk\/307070\/","title":{"rendered":"New phase of quantum matter will result in big tech advances- Earth.com"},"content":{"rendered":"

The familiar catalog of matter \u2013 solid, liquid, gas, plasma, BEC \u2013 just gained a new entry thanks to a custom crystal grown in the laboratory. This new quantum matter phase occurs when electrons<\/a> and the positive \u201choles\u201d they leave behind lock into pairs that swirl together in the same spin direction, creating a fluid of light-emitting quasiparticles.<\/p>\n

\u201cIt\u2019s a new phase of matter, similar to how water can exist as liquid, ice or vapor,\u201d said Luis A. Jauregui<\/a>, professor of physics and astronomy at UC Irvine<\/a>. <\/p>\n


\n \"EarthSnap\"\/
\n<\/a><\/p>\n

His team outlines the evidence in a recently published study, staking a claim that moves a half-century-old theory from speculation to the lab bench.<\/p>\n

New phase from electron-hole pairs<\/p>\n

Researchers first proposed the excitonic insulator<\/a> in 1965, arguing that a strong enough pull between electrons and holes would cause them to bind and open an energy<\/a> gap that halts ordinary conduction. <\/p>\n

The twist in the Irvine work is that the pairs align their spins rather than cancel them, forming a spin triplet condensate hinted at only in thought experiments until now.<\/p>\n

Fresh reviews<\/a> note that solid evidence for any excitonic insulator has remained elusive because most candidate materials freeze or destabilize before the necessary correlations emerge. <\/p>\n

By coaxing a narrowly gapped crystal into the \u201cultra-quantum limit,\u201d the new experiment clears that hurdle and offers a platform stable at a few kelvin, a temperature range reachable with common cryostats.<\/p>\n

The resulting liquid is not a superconductor, yet its charge-neutral pairs can flow without the scattering that heats conventional circuits. <\/p>\n

That distinction excites engineers who hunt for ways to move data with spin or valley degrees of freedom rather than raw charge.<\/p>\n

Hafnium pentatelluride breaks the rules<\/p>\n

The team built their sample from Hafnium pentatelluride<\/a>, a layered topological material previously known for anomalous thermoelectric behavior. <\/p>\n

Strong spin-orbit coupling in the telluride lattice narrows the band gap to fractions of an electron volt, making it fertile ground for electron-hole attraction.<\/p>\n

Postdoctoral researcher Jinyu Liu<\/a> cut the crystal into Hall-bar devices<\/a> and added gold contacts thinner than a human hair. <\/p>\n

The delicate patterning, carried out in Irvine\u2019s cleanroom, preserved the material\u2019s pristine layers while allowing two-terminal transport tests under extreme magnetic fields<\/a>.<\/p>\n

\u201cIf we could hold it in our hands, it would glow a bright, high-frequency light,\u201d remarked Jauregui, hinting at the virtual photons tied to each bound pair. The comment highlights how the phase mixes electronic and optical properties in ways still being mapped.<\/p>\n

Phase change confirmed in lab<\/p>\n

With help from the Los Alamos National Laboratory (LANL<\/a>), the group exposed the devices to a 70-tesla pulse, roughly 700,000 times stronger than Earth\u2019s field. <\/p>\n

Resistance along the current path jumped by orders of magnitude, while the Hall signal collapsed toward zero, classic fingerprints of an insulating state.<\/p>\n

Landau quantization simplifies the spectrum in such fields, forcing carriers into discrete Landau levels<\/a>. Past a critical field, the two lowest levels, one for spin-up electrons, one for spin-down holes, cross and hybridize. <\/p>\n

Modeling by theorist Shi-Zeng Lin<\/a> shows that the crossing seeds the spin-triplet gap<\/a> measured at about 250 micro-electron-volts.<\/p>\n

Because the gap is tied to spin alignment, it survives minor disorder that would kill a conventional charge gap. That resilience hints at practical robustness missing from many fragile quantum phases.<\/p>\n

Why does any of this matter?<\/p>\n

Using spins instead of electric charges to carry information could cut down on heat in computer chips, which is a major goal for researchers in spintronics<\/a>. <\/p>\n

These special spin-aligned pairs don\u2019t carry any net charge, so they aren\u2019t disrupted by stray electric fields that often cause problems in tiny circuits.<\/p>\n

Some scientists think these pairs could even allow spin to flow smoothly without resistance, like how liquid helium flows without friction. <\/p>\n

If that\u2019s true, it could lead to strange and useful effects that have only been seen in a few advanced systems, opening the door to new types of tech.<\/p>\n

Power without plugs<\/p>\n

Exciton liquids naturally couple to light. In Hafnium pentatelluride, recombination is expected to emit photons in the ultraviolet range that can be harvested by integrated diodes. <\/p>\n

A chip that recycles this light back into electrical work would, in principle, top itself up while idling, a vision sometimes called a \u201cself-charging computer.\u201d<\/p>\n

This idea fits well with brain-inspired computer designs that use low-power memory components instead of energy-hungry traditional circuits. <\/p>\n

Recent tests<\/a> show that spin-based parts can switch using extremely small amounts of energy, much less than what today\u2019s standard chips need.<\/p>\n

Electron-hole pairs and space tech<\/p>\n

Deep space is awash in protons and heavy ions that flip bits and pummel silicon. Radiation-tolerant design<\/a> often adds shielding, redundant logic, and hardened gates, all at weight and cost penalties.<\/p>\n

A condensate made of neutral pairs sidesteps many single-event upsets because incoming particles interact mainly through charge. <\/p>\n

Topological protections further suppress backscattering, according to modeling<\/a> of magnetic 2D heterostructures that remain stable after megarad doses.<\/p>\n

Shieldless computers would lighten probes to Mars and beyond, and their longer lifetimes would shrink the spare-parts budgets of satellite constellations. <\/p>\n

Industry already hunts for components that tolerate 1.5 billion-rad totals<\/a>, a bar this phase could help clear.<\/p>\n

Where the science heads next<\/p>\n

Jauregui\u2019s group plans to grow wider samples to check whether the phase supports edge currents that could be braided for fault-tolerant qubits. <\/p>\n

They also aim to tweak the telluride stoichiometry, nudging the band overlap so the triplet forms at lower fields reachable with tabletop magnets.<\/p>\n

Devices that layer hafnium pentatelluride between magnetic or superconducting materials might reveal new ways electron-hole pairs and other particles interact inside the material<\/a>. <\/p>\n

These setups could give engineers new tools for building tiny switches that use just a small amount of spin energy to turn on and off.<\/p>\n

Finally, collaborators at the National High Magnetic Field Laboratory<\/a> are designing long-pulse coils to probe the condensate\u2019s lifetime. If the phase lingers after the field ramps down, chips could run in everyday labs instead of billion-dollar magnets.<\/p>\n

The study is published in Physical Review Letters<\/a>.<\/p>\n

\u2014\u2013<\/p>\n

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Check us out on EarthSnap<\/a>, a free app brought to you by Eric Ralls<\/a> and Earth.com.<\/p>\n

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