Monday 10 March 2025
The quest for precise control over magnetism has long been a holy grail for scientists. Traditionally, magnetic fields are generated through external means, such as electromagnets or permanent magnets. However, this approach has its limitations – it can be difficult to focus magnetic fields and generate strong fields in small spaces.
In recent years, researchers have turned their attention to electrical and optical methods of controlling magnetism. These approaches involve using electric fields or light to manipulate the spin of electrons and create a magnetic response. The linear Edelstein effect is one such phenomenon where an electric field can induce a static magnetic moment in certain materials.
However, there are limitations to this approach as well. The strength of the magnetic response is often weak and can be easily disrupted by external factors. Moreover, it’s difficult to predict when and how these effects will occur in different materials.
A new study published in Materials Today Quantum Linear and Nonlinear Edelstein Effects in Chiral Topological Semimetals has shed light on a previously overlooked phenomenon – the nonlinear Edelstein effect (NLEE). This effect occurs when an electric field induces a magnetic response that is not proportional to the strength of the electric field. Instead, it’s a more complex interplay between the electric and magnetic fields.
The researchers used first-principles calculations to investigate the NLEE in chiral topological semimetals – a class of materials known for their unusual electronic properties. They found that the NLEE can occur even in non-magnetic materials, as long as they have broken time-reversal symmetry. This means that the material’s internal structure and arrangement of atoms play a crucial role in determining the strength and direction of the magnetic response.
The study also revealed that the NLEE can be highly dependent on the specific material being studied. In some cases, the effect can be quite strong, while in others it may be much weaker. This highlights the importance of understanding the underlying physics of each material to harness its potential for magnetism control.
One of the most exciting implications of this research is the possibility of creating new devices that can manipulate magnetism with unprecedented precision and control. These devices could have far-reaching applications in fields such as spintronics, magnetic memory, and even quantum computing.
The NLEE also opens up new avenues for fundamental research into the properties of materials at the quantum level.
Cite this article: “Unlocking Magnetic Control with Nonlinear Edelstein Effects”, The Science Archive, 2025.
Magnetism, Edelstein Effect, Nonlinear Edelstein Effect, Chiral Topological Semimetals, Time-Reversal Symmetry, Quantum Computing, Spintronics, Magnetic Memory, First-Principles Calculations, Materials Science.
Reference: Haowei Xu, Ju Li, “Linear and Nonlinear Edelstein Effects in Chiral Topological Semimetals” (2025).
