A Breakthrough in Manipulating Topological Materials

Has introduced a groundbreaking method for controlling the electronic properties of magnetic Weyl semimetals using hydrogen cations (H⁺). These semimetals, a class of topological materials, allow electrons to act as massless Weyl fermions—particles with a unique property called chirality, which links their spin and momentum.

Figure 1. Hydrogen Ions: Revolutionizing Quantum Technology.

Focusing on the magnetic material MnSb₂Te₄, the researchers discovered that introducing hydrogen ions can "tune" and enhance the chirality of electron transport. This approach modifies the material's energy features, known as Weyl nodes, in a precise and controllable way. Their findings, could drive advancements in quantum technologies, including chiral nano-spintronics and fault-tolerant quantum computing. Figure 1 Shows Hydrogen Ions: Revolutionizing Quantum Technology.

Hydrogen Tuning for Improved Quantum Performance

The team's innovative technique uses hydrogen ions to reduce bond disorder in the Mn-Te structure of MnSb₂Te₄, lowering internode scattering and reshaping Weyl nodes. By employing angularly-resolved electrical transport, they observed how electrical charges respond differently to clockwise or counterclockwise magnetic field rotation. This process generates low-dissipation currents, enhancing the material's transport chirality.

The tuned Weyl states also exhibited doubled Curie temperatures and a "chiral switch," which is tunable at low fields. This switch arises from the interplay of topological Berry curvature, the chiral anomaly, and hydrogen-mediated Weyl node dynamics, offering exciting possibilities for designing new quantum devices.

Expanding the Potential of Topological Quantum Materials

Professor Krusin-Elbaum highlighted the significance of this work: “The major advance of this research is broadening the scope of designer topological quantum materials beyond nature's blueprint. By using hydrogen or other light elements to engineer defect pathways, we unlock new platforms for exploring topological phases with remarkable macroscopic behaviors. This could revolutionize chirality-based applications in future quantum devices.”

Toward Energy-Efficient Quantum Technologies

The Krusin Lab is at the forefront of studying cutting-edge quantum phenomena, including the Quantum Anomalous Hall effect (where insulators conduct current on their surfaces without energy loss), 2D superconductivity, and axion state phenomena involving quantized thermal transport. These advancements hold immense potential for energy-efficient and scalable quantum technologies.

Their demonstrated technique is highly adaptable and could transform intrinsic topological magnets into key components for next-generation quantum electronics.

Source: SciTECHDaily

Cite this article:

Priyadharshini S (2025),How Hydrogen Ions Are Transforming Quantum Technology, AnaTechMaz, pp. 187