Szczegóły publikacji
Opis bibliograficzny
Scanning gate microscopy probing of anisotropic electron flow in a two-dimensional electron gas at the (110) $LaAlO_{3}/SrTiO_{3}$ interface: a theoretical investigation / M. P. NOWAK, M. ZEGRODNIK, D. Grzelec, B. SZAFRAN, R. Citro, P. WÓJCIK // Physical Review . B ; ISSN 2469-9950. — Tytuł poprz.: Physical Review B, Condensed Matter and Materials Physics ; ISSN: 1098-0121. — 2025 — vol. 112 iss. 11 art. no. 115403, s. 115403-1–115403-11. — Bibliogr. s. 115403–9–115403-11, Abstr. — Publikacja dostępna online od: 2025-09-02
Autorzy (6)
Dane bibliometryczne
| ID BaDAP | 162258 |
|---|---|
| Data dodania do BaDAP | 2025-09-11 |
| Tekst źródłowy | URL |
| DOI | 10.1103/fr4n-v9vq |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Physical Review, B |
Abstract
We theoretically investigate the anisotropic dispersion features of a two-dimensional electron gas at the (110) oriented LaAlO3/SrTiO3 interfaces, as revealed by scanning gate microscopy of electronic flow from a quantum point contact. The dispersion relation of the (110) LaAlO3/SrTiO3 interface is characterized by a highly noncircular Fermi surface. Here, we develop an efficient tight-binding model for the electron gas at the interface. We show that the anisotropy of the Fermi surface causes both the direction of the electron flux from the quantum point contact and the periodicity of the self-interference conductance fringes to depend strongly on the orientation of the constriction relative to the crystal lattice. We show that the radially nonuniform distribution of the Fermi velocity on the Fermi surface results in skewing of electron trajectories when the quantum point contact gates are not aligned with the in-plane primitive vectors. We show that this effect results in the separation of electrons belonging to different orbitals for wide (110) LaAlO3/SrTiO3 quantum wells.
