We show that the separation of contributions to low-temperature heat capacity and the Hall effect, carried out in Phys. Rev. Lett. 120 257206 (2018), Nat. Phys. 15 954 (2019), Phys. Rev. X 12 021050 (2022), leads to unfounded conclusions about (i) the formation of uncharged quasiparticles (Majorana fermions) and (ii) the transition, as the magnetic field increases, to the metallic state with heavy fermions in the YbB₁₂ semiconductor with strong electronic correlations. We obtain an alternative explanation of the experimental data in terms of the filamentary structure of conducting channels in the semiconductor matrix of ytterbium-based dodecaborides. Such channels (charge stripes) are nanoscale electron-density inhomogeneities and form manybody states near the Fermi level.

Keywords: Kondo insulators, electronic phase separation, dynamical charge stripes PACS: 71.27.+a, 73.22.−f, 75.47.−m (all) DOI: 10.3367/UFNe.2023.06.039405 URL: https://ufn.ru/en/articles/2024/3/f/ 001222840200006 2-s2.0-85191841413 2024PhyU...67..314A Citation: Azarevich A N, Bogach A V, Gavrilkin S Yu, Demishev S V, Sluchanko N E "On the problem of detecting Majorana fermions in heat capacity and Hall effect measurements in the Kondo insulator YbB12" Phys. Usp. 67 314–321 (2024) BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks Received: 25th, May 2023, accepted: 20th, June 2023 Оригинал: Азаревич А Н, Богач А В, Гаврилкин С Ю, Демишев С В, Случанко Н Е «К вопросу о детектировании майорановских фермионов при измерениях теплоёмкости и эффекта Холла в кондо-изоляторе YbB12» УФН 194 336–343 (2024); DOI: 10.3367/UFNr.2023.06.039405