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I'm sure it will continue to be investigated. If structure is detected inside of quarks and leptons some day, it'll definitely be in the news.
The electron has no known substructure. Nevertheless, in condensed matter physics, spin–charge separation can occur in some materials. In such cases, electrons 'split' into three independent particles, the spinon, the orbiton and the holon (or chargon). The electron can always be theoretically considered as a bound state of the three, with the spinon carrying the spin of the electron, the orbiton carrying the orbital degree of freedom and the chargon carrying the charge, but in certain conditions they can behave as independent quasiparticles.
Electrons, being of like charge, repel each other. As a result, in order to move past each other in an extremely crowded environment, they are forced to modify their behavior. Research published in July 2009 by the University of Cambridge and the University of Birmingham in England showed that electrons could jump from the surface of the metal onto a closely located quantum wire by quantum tunneling, and upon doing so, will separate into two quasiparticles, named spinons and holons by the researchers.The orbiton was predicted theoretically by van den Brink, Khomskii and Sawatzky in 1997–1998. Its experimental observation as a separate quasiparticle was reported in paper sent to publishers in September 2011. The research states that by firing a beam of X-ray photons at a single electron in a one-dimensional sample of strontium cuprate, this will excite the electron to a higher orbital, causing the beam to lose a fraction of its energy in the process. In doing so, the electron will be separated into a spinon and an orbiton. This can be traced by observing the energy and momentum of the X-rays before and after the collision.
in certain conditions (electrons) can behave as independent quasiparticles.
These properties are not fundamental to an isolated electron, but are characteristics of the electron's interactions with bulk matter.
The electron can always be theoretically considered as a bound state of the three.
PS: I found a reference to the 2012 findings: https://www.nature.com/articles/nature.2012.10471- Please provide a link to the recent paper that you cite (or a news article describing it - preferably in English)