Temperature dependence of the paramagnetic spin susceptibility of doped graphene

Abstract

In this work, we present a semi-analytical expression for the temperature dependence of a spinresolved dynamical density-density response function of massless Dirac fermions within the Random Phase Approximation. This result is crucial in order to describe thermodynamic properties of the interacting systems. In particular, we use it to make quantitative predictions for the paramagnetic spin susceptibility of doped graphene sheets. We find that, at low temperatures, the spin susceptibility behaves like T −2 which is completely different from the temperature dependence of the magnetic susceptibility in undoped graphene sheets.

Nonequilibrium plasmons with gain in graphene

“…It should be pointed out that this discontinuity is rooted in the singularities of the polarizability, which are physical and cannot be lifted. As the polarizability appears in the Helmholtz free energy [77,103,104] the discontinuity may relate to a thermodynamic phase-transition. This clearly requires a more in depth analysis, which goes beyond the scope of this paper and will be explored in a follow-up study.…”

Enhanced Energy Transfer between Nitrogen‐Vacancy Centers and 2D MoS2 Films Accurately Fabricated by Atomic Layer Deposition

“…v F = 5.33 × 10 5 ms −1 is the Fermi velocity in monolayer MoS 2. [ 36 ] According to the parameters provided by the manufacturer, suppose z is ≈15 nm. The parameters are brought into formulas (2) and (3) for calculation.…”

“…The system of NV centers and MoS 2 films was simulated by the finite difference time domain method (see supplementary materials for details), as shown in [36] The energy transfer efficiency between the NV center and the 180 cycles MoS 2 film was calculated by the formula (1), and the result was 0.7008 (70.8%), which was different from the energy transfer efficiency calculated by the fluorescence intensity. This is mainly attributed to the uneven thickness of the film deposited by ALD.…”

Electronic cooling via interlayer Coulomb coupling in multilayer epitaxial graphene

“…The density–density response function of the doped 2D Dirac electron model was first considered by Shung 47 at zero temperature as a step towards a theory of collective excitations in graphite. The Dirac electron expression χ i ( q , ω , T i ) at finite temperature has been recently considered 48 49 50 . Before proceeding with the rate calculations, however, we must first discuss the approximation we use for the screened interlayer Coulomb interaction.…”

“…The Dirac electron expression χ i (q, ω, T i ) at finite temperature has been recently considered. [47][48][49] Before proceeding with the rate calculations, however, we must first discuss the approximation we use for the screened interlayer Coulomb interaction.…”