Quantum dot thermoelectric under the effect of Rashba spin-orbit and Majorana bound states

Ait Bahadou M., Ait Mansour H., DEMİR İ., El Anouz K., El Allati A.

Physica B: Condensed Matter, cilt.720, 2026 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 720
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1016/j.physb.2025.418003
  • Dergi Adı: Physica B: Condensed Matter
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC
  • Anahtar Kelimeler: Quantum dots, Rashba spin–orbit interaction, Topological superconductor nanowire
  • Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

In this paper, we study the effect of a Rashba spin–orbit coupling (RSOC) on a quantum dot (QD) that contains Majorana-bound states (MBS). Indeed, the QD exhibits the Zeeman splitting in its energy levels upon the application of an external magnetic field. The QD is basically connected to two ferromagnetic leads using two tunneling processes, namely conserving and non-conserving electron spin by means of spin flip of tunneling electrons, respectively. Moreover, by using the non-equilibrium Green's function technique in the linear regime, we analyze in detail the charge and heat currents of the proposed system. Our results indicate that the electrical conductance spectrum exhibits asymmetric Fano resonances, arising from the quantum interference between the direct transmission through the QD and indirect path via the MBSs, which reflects the presence of MBSs in the system. Moreover, we demonstrate that the RSOC enhances significantly the thermoelectric response, particularly when the MBSs are hybridized. This enhancement is reinforced by increasing the temperature. Hence, one can conclude that the effect of RSOC in a system containing MBS provides new perspectives for probing topological states and optimizing nanoscale thermoelectric devices.