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    Area of Science:

    • Condensed Matter Physics
    • Quantum Mechanics
    • Materials Science

    Background:

    • Quantum dots and molecular structures are key in spintronics.
    • Aharonov-Bohm rings offer unique electron interference phenomena.
    • Rashba spin-orbit interaction influences electron spin dynamics.

    Purpose of the Study:

    • Investigate spin-polarized transport in a double quantum dot-molecule Aharonov-Bohm ring.
    • Analyze the role of Rashba spin-orbit (RSO) interaction on conductance.
    • Explain the anti-resonance phenomenon using molecular state representation.

    Main Methods:

    • Theoretical study using the equation of motion Green's function method.
    • Utilized molecular state representation for analysis.
    • Investigated the impact of interdot coupling and RSO interaction strength.

    Main Results:

    • Explained anti-resonance in conductance spectra via molecular states.
    • Showed interdot coupling strength determines antiresonant peak positions.
    • Demonstrated RSO interaction strength controls spin-dependent conductance magnitude.

    Conclusions:

    • The Aharonov-Bohm ring with quantum dots exhibits tunable spin-polarized transport.
    • Rashba spin-orbit interaction allows for manipulation of spin components.
    • Achieved selective electron transport (spin filtering) by tuning RSO interaction.