The interplay between topology and magnetism has a bright future — ScienceDaily

The brand new evaluate paper on magnetic topological supplies of Andrei Bernevig, Princeton College, USA, Haim Beidenkopf, Weizmann Institute of Science, Israel, and Claudia Felser, Max Planck Institute for Chemical Physics of Solids, Dresden, Germany, introduces the brand new theoretical idea that interweave magnetism and topology. It identifies and surveys potential new magnetic topological supplies, mentions their attainable future purposes in spin and quantum electronics and as supplies for environment friendly power conversion. The evaluate discusses the connection between topology, symmetry and magnetism at a degree appropriate for graduate college students in physics, chemistry and supplies science which have a primary data of condensed matter physics.

Magnetic topological supplies symbolize a category of compounds whose properties are strongly influenced by the topology of the digital wavefunctions coupled with their spin configuration. Topology is a straightforward idea coping with the surfaces of objects. The topology of a mathematical construction is an identical whether it is preserved underneath steady deformation. A pancake has the identical topology as a dice, a donut as a espresso cup, and a pretzel as a board with three holes. Including spin affords further construction — a brand new diploma of freedom — for the belief of latest states of matter that aren’t recognized in non-magnetic supplies. Magnetic topological supplies can assist chiral channels of electrons and spins, and can be utilized for an array of purposes from info storage, management of dissipationless spin and cost transport, to large responses underneath exterior stimuli reminiscent of temperature and light-weight.

The evaluate summarizes the theoretical and experimental progress achieved within the discipline of magnetic topological supplies starting with the theoretical prediction of the Quantum Anomalous Corridor Impact with out Landau ranges, and resulting in the latest discoveries of magnetic Weyl semimetals and antiferromagnetic topological insulators. Latest theoretical progress that resulted within the tabulation of all magnetic symmetry group representations and topology is printed. On account of this, all recognized magnetic supplies — together with future discoveries — could be absolutely characterised by their topological properties. The identification of supplies for a particular technological software (e.g. Quantum Anomalous Corridor) is simple. Utilizing this strategy magnetic topological supplies with magnetic transition temperatures above room temperature could be recognized or if crucial, designed for classical purposes reminiscent of thermoelectric gadgets, Corridor sensors or environment friendly catalysts however they’re additionally helpful for quantum purposes at low temperatures, together with computing and sensing.

Andrei Bernevig feedback that “The conclusion of the QAHE at room temperature could be revolutionary, overcoming limitations of many data-based applied sciences, that are affected by energy losses from Joule heating,” and his colleague Stuart Parkin, Max PIanck Institute of Microstructure Physics, Halle, Germany, “can think about how the novel properties of this new class of magnetic supplies can pave the way in which to new generations of low power consuming quantum digital and spintronic gadgets and even novel superconducting spintronic gadgets.” Claudia Felser, MPI CPfS is most enthusiastic about their potential purposes in chemistry. She says “if we will design a magnetic catalyst for water splitting we’d be capable to change the catalytic properties with an exterior discipline, which might permit us to modify on and off catalysis.” For Haim Beidenkopf, the quantum pc is maybe essentially the most thrilling path in science in the present day: “The design of a cloth that displays a excessive temperature quantum anomalous Corridor through quantum confinement of a magnetic Weyl semimetal, and its integration into quantum gadgets is my essential objective for the long run.” The sector of magnetic topological supplies clearly has and may have influence in each the scientific and technological worlds.

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Supplies offered by Max Planck Institute for Chemical Physics of Solids. Notice: Content material could also be edited for model and size.

Journal Reference:

  1. B. Andrei Bernevig, Claudia Felser, Haim Beidenkopf. Progress and prospects in magnetic topological supplies. Nature, 2022; 603 (7899): 41 DOI: 10.1038/s41586-021-04105-x

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Max Planck Institute for Chemical Physics of Solids. “The interaction between topology and magnetism has a vivid future.” ScienceDaily. ScienceDaily, 2 March 2022. <>.

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