Intriguing behavior of such electrons in particular materials produced by chemical synthesis

Unpaired electrons located at linear band dispersion（LBD）are exceptional and called Dirac electrons（DE）. They are paid attention to because of the unique electronic properties such as temperature（T）-independent resistivity, as if they belong to neither metallic nor non-metallic substances. In this study, we have developed a series of new organic Dirac electron systems and discovered universal features of magnetic behavior originating from LBD.

Unique physical properties of materials have been the center of interest in material science community. Among them, quantum materials have recently garnered growing attention, because of their unprecedented physical properties governed by photon-like electrons. We have synthesized a series of organic compounds of as a new member of quantum materials. After theoretical and experimental examination, we have discovered universal features of magnetic behavior shared by them. Based on our original theoretical model, the behavior is directly related to a characteristic feature of their band structures called linear band dispersion（LBD）. Accordingly, such magnetic behavior is intrinsic and universal to quantum materials with LBD. The findings here will accelerate the understanding and application of quantum materials, which will enable advanced information and communication technology that other materials cannot achieve.

Reference URL: https://pubs.acs.org/doi/full/10.1021/acs.jpclett.5c02197

Bibliographic Information

Universal Features of Magnetic Behavior Originating from Linear Band Dispersion: α-BETS₂X and α’-BETS₂Y（BETS = Bis（ethylenedithio）tetraselenafulvalene X = IBr₂, I₂Br, Y = IBr₂, ICl₂）, Sakura Hiramoto, Koki Funatsu, Kensuke Konishi, Haruhiko Dekura, Naoya Tajima and Toshio Naito, The Journal of Physical Chemistry Letters, 16, 9116—9123, DOI: 10.1021/acs.jpclett.5c02197, 2025（August 26）.

Fundings

• Japan Society for the Promotion of Science（JSPS）KAKENHI Grant Number 22H02034, 24K21755, 23H03964, and 24K01470
• Canon Foundation for Scientific Research（Science and Technology that Achieves a Good Future）

Media

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  Electrons in Wonderland

  Quantum materials contain relativistic particles called Dirac electrons governing unique physical properties. They are sometimes massless and move with the light velocity, being rather like photons than electrons. However, in some organic charge-transfer complexes, they transform themselves between standard and Dirac electrons depending on temperature. Furthermore, they sometimes behave in between.

  credit : The copyright is owned by the American Chemical Society.
  Usage Restriction : With explicit citation of the original article; https://pubs.acs.org/doi/full/10.1021/acs.jpclett.5c02197