Szczegóły publikacji
Opis bibliograficzny
Topological superconductivity of a two-dimensional electron gas at the (001) $LaAlO_{3}/SrTiO_{3}$ interface / Piotr Żeberek, Paweł WÓJCIK // Physical Review . B ; ISSN 2469-9950. — Tytuł poprz.: Physical Review B, Condensed Matter and Materials Physics ; ISSN: 1098-0121. — 2026 — vol. 114 iss. 11 art. no. 115416, s. 115416-1–115416-19. — Bibliogr. s. 115416-17–115416-19, Abstr. — Publikacja dostępna online od: 2026-08-24
Autorzy (2)
Dane bibliometryczne
| ID BaDAP | 169822 |
|---|---|
| Data dodania do BaDAP | 2026-09-30 |
| Tekst źródłowy | URL |
| DOI | 10.1103/m5nr-3bzs |
| Rok publikacji | 2026 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Physical Review, B |
Abstract
We investigate the emergence of topological superconductivity and Majorana zero modes in the two-dimensional electron gas formed at the (001) LaAlO3/SrTiO3 interface. Using a realistic multiband tight-binding model that incorporates the 𝑡2𝑔 orbital structure together with atomic and Rashba spin-orbit couplings, we determine the topological phase diagrams for both fully two-dimensional and quasi-one-dimensional geometries. In the two-dimensional limit, we show that a finite out-of-plane magnetic-field component is required to drive a topological phase transition. In this case, the critical field is strongly band dependent, and for higher-lying bands it is controlled by the interplay of spin and orbital Zeeman effects, as well as atomic spin-orbit coupling. Although a purely in-plane field is insufficient to induce the topological transition in a full 2D system, we demonstrate that a lateral confinement relaxes this constraint. In this case, the character of the edge modes depends sensitively on the field orientation, with out-of-plane fields producing conventional counterpropagating chiral modes and transverse in-plane fields giving rise to copropagating antichiral modes. Finally, Majorana zero modes in LAO/STO nanowires with varying widths are analyzed. We demonstrate that subbands predominantly composed of 𝑑𝑦𝑧/𝑥𝑧 orbitals exhibit exceptionally long localization lengths, which may preclude the observation of Majorana bound states in nanowires of typical experimental dimensions.
