Researchers Find Light Controls Superconductivity Up To 8.5 K In New System

Researchers have, for the first time, demonstrated a light-programmable superconducting state at an aluminium-silicon heterojunction, achieving critical temperatures ranging from 1.8 to 8.5 K through precise control with femtosecond laser pulses. The work, reported by Viktoria Yursa and eight colleagues, reveals a complex yet robust superconducting effect where temperatures can be increased or erased at will. This light-induced superconductivity (LiPS) exhibits a Berezinski-Kosterlitz-Thouless topological transition at low temperatures, alongside a distinct quantum phase disorder appearing above 2 K, suggesting multi-state behavior. The origin of this effect is linked to light pulse control of a “Moire-like superlattice of misfit dislocations” visible at the interface, opening a route to engineering long-range phase coherent superconducting states for quantum circuits and switchable devices. Light-Induced Superconductivity at Al/Si Heterojunctions The creation of programmable superconductivity, controlled by light, has moved closer to reality with the demonstration of a robust light-programmable superconducting (LiPS) state at an aluminium-silicon heterojunction; researchers achieved critical temperatures ranging from 1.8 to 8.5 K. This achievement, detailed in work led by Viktoria Yursa and eight colleagues, signifies a substantial, though still cryogenic, level of control over a superconducting state, opening possibilities for novel quantum devices.

The team’s experiments reveal that the interface between aluminium and silicon is key, specifically the control of the “Moire-like superlattice of misfit dislocations” visible with high-resolution electron microscopy. The LiPS state isn’t a single phenomenon; at low temperatures, the system exhibits characteristics of a Berezinski-Kosterlitz-Thouless topological transition, a specific type of phase transition in two-dimensional systems. Above 2 K, a distinct state emerges, displaying “clear signatures of quantum phase disorder,” suggesting a complex interplay of quantum behaviors manipulated by light. The researchers observed behavior consistent with vortex pinning and creep in the presence of a magnetic field, further supporting the two-dimensional nature of the phase-coherent system. The paper reports that the origin of this light-induced effect lies in the ability of laser pulses to manipulate the superlattice periodicity of misfit dislocations, defects naturally occurring at the aluminium-silicon interface. Light pulses can induce and control topologically protected soliton-like kinks along these dislocation lines, imparting metastability to the system. A critical temperature of 5 K represents a significant, though still cryogenic, achievement in controlling material properties with femtosecond laser pulses. This level of control allows for both the creation and erasure of the superconducting state through tailored pulse sequences, opening possibilities for dynamic manipulation of quantum materials. 👉 More information🗞 A programmable superconductor created by light✍️ Viktoria Yursa et al.🧠 ArXiv: https://arxiv.org/abs/2607.14567 Stay currentSee today’s quantum computing news on Quantum Zeitgeist for the latest breakthroughs in qubits, hardware, algorithms, and industry deals. Tags: Muhammad Rohail T. As a quantum scientist exploring the frontiers of physics and technology. My work focuses on uncovering how quantum mechanics, computing, and emerging technologies are transforming our understanding of reality. I share research-driven insights that make complex ideas in quantum science clear, engaging, and relevant to the modern world. Latest Posts by Muhammad Rohail T.: Instituto de Física Teórica UAM/CSIC Maps Holographic Flows to Little Rip August 20, 2026 Positive Translation-Invariant Solution Found for Cayley Tree Dynamics August 20, 2026 Triangular Lattice Estimate Reaches 1.475661534848 Via Duality August 19, 2026