Effects of Rashba Coupling and Gap on Linear and Nonlinear Optical Conductivity in Graphene Layer.
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| Title: | Effects of Rashba Coupling and Gap on Linear and Nonlinear Optical Conductivity in Graphene Layer. |
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| Authors: | Naifar, A.1,2 (AUTHOR) naifaramin174@gmail.com, Hasanirokh, K.3 (AUTHOR) zhasanirokh@yahoo.com |
| Source: | Plasmonics. Oct2025, Vol. 20 Issue 10, p9369-9378. 10p. |
| Subjects: | Optical conductivity, Kerr electro-optical effect, Chemical potential, Spin-orbit interactions, Graphene, Spintronics, Third harmonic generation |
| Abstract: | This research paper investigates the Kerr effect and third harmonic generation in a gapped graphene layer determined by the Rashba spin–orbit coupling and the bandgap, aiming to develop graphene-based spintronic instruments. The eigenstates and energy dispersion of the system are obtained through computation of the time-independent Schrödinger equation. Main outcomes proved that incrementing the Rashba coupling metric (λ) considerably reduces the σ inter min (1) , whereas when the temperature jumps from 4 to 27 ℃, the linear conductivity decreases. Moreover, when λ sweeps from 60 to 80 meV, the σ inter max (1) is rapidly enhanced, especially when photon frequencies exeeds 6 × 1013 Hz. Our calculations demonstrated that when chemical potential increments, more states around the Dirac points become accessible for electronic transitions, enhancing the interband optical conductivity. Finally, for σ inter (1) (Kerr effect), a quasi-oscillatory behavior is witnessed which rapidly diminishes and is minimized as the mass metric increased from 1 to 2 meV. Our detailed exploration provides fruitful insights into the design of advanced graphene-optoelectronics and spintronic devices. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | This research paper investigates the Kerr effect and third harmonic generation in a gapped graphene layer determined by the Rashba spin–orbit coupling and the bandgap, aiming to develop graphene-based spintronic instruments. The eigenstates and energy dispersion of the system are obtained through computation of the time-independent Schrödinger equation. Main outcomes proved that incrementing the Rashba coupling metric (λ) considerably reduces the σ inter min (1) , whereas when the temperature jumps from 4 to 27 ℃, the linear conductivity decreases. Moreover, when λ sweeps from 60 to 80 meV, the σ inter max (1) is rapidly enhanced, especially when photon frequencies exeeds 6 × 1013 Hz. Our calculations demonstrated that when chemical potential increments, more states around the Dirac points become accessible for electronic transitions, enhancing the interband optical conductivity. Finally, for σ inter (1) (Kerr effect), a quasi-oscillatory behavior is witnessed which rapidly diminishes and is minimized as the mass metric increased from 1 to 2 meV. Our detailed exploration provides fruitful insights into the design of advanced graphene-optoelectronics and spintronic devices. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 15571955 |
| DOI: | 10.1007/s11468-025-02999-1 |
