Mode shifting due to spin polarization in single layer graphene on a substrate
Sprache des Vortragstitels:
Summer School on Collective Behaviour in Quantum Matter
Sprache des Tagungstitel:
We report spin-sensitive full as well as partial linear response functions of graphene, which give access to charge- and spin-density related excitations. In contrast to two dimensional electron liquids in heterostructures, graphene?s collective mode can be strongly Landau damped even at small wave vectors, due to single-particle interband transitions. Increasing the spin-imbalance of the free charge carriers in Dirac materials significantly broadens and shifts the plasmon. By tuning the spin polarization of graphene, the plasmon lifetime and thus its mean free path can be controlled. In turn, the efficiency of appliances coupled to the collective modes can be manipulated.