Spin-cavity interactions in relativistic Jahn-Teller systems under strong light-matter coupling

Area of Science:

• Quantum Chemistry
• Solid-State Physics
• Spectroscopy

Background:

• Investigates the spin Zeeman effect in effective spin-1/2 systems.
• Extends previous work to relativistic Jahn-Teller scenarios under strong light-matter coupling.
• Focuses on single electrons or holes in trigonal transition metal complexes.

Purpose of the Study:

• To analyze cavity-modified spin Zeeman effects in relativistic Jahn-Teller systems.
• To understand the interplay of vibronic coupling, spin-orbit coupling (SOC), and cavity fields.
• To derive analytic expressions for Kramers pair energies and cavity-modified g-factors.

Main Methods:

• Combines the relativistic E × e-Jahn-Teller model with an effective Hamiltonian formalism.
• Employs quasi-degenerate perturbation theory for cavity-spin interactions beyond the dipole approximation.
• Derives analytic expressions for energies and g-factors in weak and strong SOC regimes.

Main Results:

• Cavity-induced g-factor modifications are significant in the weak SOC regime for both single-particle and single-hole systems.
• These modifications are effectively quenched in the strong SOC regime.
• The cavity-Zeeman correction exhibits alternating signs, differentiating single-particle and single-hole responses.

Conclusions:

• Cavity fields play a crucial role in modifying electronic g-factors in these systems.
• The strength of spin-orbit coupling dictates the relevance of cavity effects.
• Distinct responses of single-particle and single-hole systems to cavity fields are observed.