New state of matter with Chiral Currents unveiled

New state of matter with Chiral Currents unveiled
by Robert Schreiber
Berlin, Germany (SPX) Feb 12, 2024

In a groundbreaking study published in Nature, an international team of researchers has unveiled a novel state of matter, distinguished by chiral currents at the atomic level. This discovery challenges traditional understandings of magnetic materials and opens up new avenues for quantum material applications.

Chirality, a property indicating that a structure cannot be superimposed onto its mirror image, is crucial across various scientific fields, notably in understanding DNA's structure. The research group, led by Federico Mazzola from Ca' Foscari University of Venice, observed these chiral currents through interactions between light and matter. Specifically, they demonstrated that electrons could be ejected from a material's surface with a distinct spin state by employing suitably polarized photons.

This finding is a significant leap in quantum materials research, shedding light on chiral quantum phases and phenomena occurring at material surfaces. Mazzola highlighted the potential of this discovery to revolutionize electronics by utilizing chiral currents as information carriers, replacing traditional electron charge-based devices. The implications extend to developing chiral optoelectronic devices, enhancing quantum technologies for new sensors, and applications in biomedical and renewable energy sectors.

The study was grounded in theoretical predictions about chiral currents, but until now, direct evidence of such states had been elusive. Utilizing the Italian Elettra synchrotron, the research team managed to confirm the existence of this quantum state on solid surfaces, marking a first in the field. This method of investigation highlights the role of synchrotron light sources in advancing our understanding of quantum materials.

Collaboration was key to this discovery, with contributions from national and international partners, including the Ca' Foscari University of Venice, the Spin Institute, the CNR Materials Officina Institute, and the University of Salerno. The material under investigation, known for its electronic properties and relevance to superconducting spintronics, proved to be a fertile ground for discovering broader phenomena applicable across a wide array of quantum materials.

Quantum materials are at the forefront of revolutionizing our understanding of physics and technology. Their properties, often defying classical physics explanations, pave the way for innovations that could transform various industries. This new state of matter, with its unique chiral properties, exemplifies the untapped potential within quantum physics, promising a future where quantum materials redefine technological boundaries.

Research Report:Signatures of a surface spin-orbital chiral metal