Zainab A. Abd AL-Ridha1,*, Salah A. H. Al Murshidee1, and Rasha A. Hussein1
1 Department of Physics, College of Science, Al Muthanna University, Muthanna, Iraq
*Corresponding Author: Sci.zainabak@mu.edu.iq
Received 12 June. 2025, Accepted 2 Oct. 2025, published 30 Dec. 2025.
AbstractKey wordsDOI
An analytical model of serially configuration coupled quantum dots system consisting of two splitting spin strongly hybrid with two normal leads (electrodes) is proposed to investigate the role of laser field on the thermos-spin tunneling properties, Anderson model are utilized, duo to Coulomb correlation between the two splitting spin energy levels in each quantum dot. The occupation numbers on each quantum dot are formulated and solved it self-consistently. The solutions are then used to evaluate the spin currents and the differential conductance. The calculations declare that the total spin current become enhanced when coupling interaction ( ) increases, and the spin differential conductance show two splitting peaks separated by conductance gap which reflects the Pauli-spin blockade, the energy spacing between splitting peaks is equal to the value of the ( ). As the value of ( ) increases the spin conductance gap decreases. When the laser field interact with each quantum dot, the spin differential conductance enhances and induces the photon-assisted (FAT) peaks in differential conductance spectrum. An interesting results is the observation of photon-assisted (FAT) peak that can be emerged in the Pauli-spin blockade effects around ( ) region especially when .
Quantum dots, Double Quantum dot, Spintronic, thermospin, Nanoelectronics devices.
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