Emending thermal dispersion interactions of Li, Na, K and Rb alkali metal-atoms with graphene in the Dirac model

Abstract

Using accurate dynamic polarizabilities of Li, Na, K and, Rb atoms, we scrutinize the thermal Casimir-Polder interactions of these atoms with a single layered graphene. Considering the modified Lifshitz theory for material interactions, we reanalyze the dispersion coefficients ($C_3$s) of the above atoms with graphene as functions of separation distance, gap parameter and temperature among which some of them were earlier studied by estimating dynamic polarizabilities of the above atoms from the single oscillator model approximation. All these $C_3$ coefficients have been evaluated in the framework of the Dirac model. The interactions are described for a wide range of distances and temperatures to demonstrate the changes in behavior with the varying conditions of the system and also sensitivities in the interactions are analyzed by calculating them for different values of the gap parameter. From these analyses, we find a suitable value of the gap parameter for which the true nature of the interactions in graphene can be surmised more accurately.

8 pages, 7 figures, 1 table

References in corpus (9)

• Electric Field Effect in Atomically Thin Carbon Films
• The electronic properties of graphene
• Detection of Individual Gas Molecules Absorbed on Graphene
• High-capacity hydrogen storage by metallized graphene
• Lifshitz-type formulas for graphene and single-wall carbon nanotubes: van der Waals and Casimir interations
• Van der Waals interaction between a microparticle and a single-wall carbon nanotube
• Magic wavelengths for the np-ns transitions in alkali-metal atoms
• Theory of the Casimir interaction for graphene-coated substrates using the polarization tensor and comparison with experiment
• Spontaneous decay dynamics in atomically doped carbon nanotubes

Cited by in corpus (6)

• Origin of large thermal effect in the Casimir interaction between two graphene sheets
• Conductivity of graphene in the framework of Dirac model: Interplay between nonzero mass gap and chemical potential
• Thermal effect in the Casimir force for graphene and graphene-coated substrates: Impact of nonzero mass gap and chemical potential
• Quantum electrodynamic approach to the conductivity of gapped graphene
• Nernst heat theorem for the thermal Casimir interaction between two graphene sheets
• Polarizabilities and tune-out wavelengths of the hyperfine ground states of ${}^{87,85}$Rb