Inter-band magnetoplasmons in mono- and bilayer graphene

Tahir, M.; Sabeeh, K.

doi:10.1088/0953-8984/20/42/425202

Cited by 17 publications

(24 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5. Again the results exhibit a square-root dependence on B and agree with recent graphene theory [21][22][23][24][25] and experiments [28] in the limit λ = 2ℓE z = 0 provided we use v F = 1 × 10 6 m/s. The experimentally observed [28], √ B dependence of the spectrum referred to above, in the limit λ = V → 0, applies to high-mobility weakly-doped graphene samples, cf.…”

Section: Magnetoplasmonssupporting

confidence: 88%

Electrically tunable magnetoplasmons in a monolayer of silicene or germanene

Tahir

Vasilopoulos

2015

J. Phys.: Condens. Matter

Self Cite

View full text Add to dashboard Cite

We theoretically study electrically tunable magnetoplasmons in a monolayer of silicene or germanene. We derive the dynamical response function and take into account the effects of strong spin-orbit coupling (SOC) and of an external electric filed E(z) perpendicular to the plane of the buckled silicene/germanene. Employing the random-phase approximation we analyze the magnetoplasmon spectrum. The dispersion relation has the same form as in a two-dimensional electron gas with the cyclotron and plasma frequencies modified due to the SOC and the field E(z). In the absence of SOC and E(z), our results agree well with recent experiments on graphene. The predicted effects could be tested by experiments similar to those on graphene and would be useful for future spintronics and optoelectronic devices.

show abstract

Section: Magnetoplasmonssupporting

confidence: 88%

Electrically tunable magnetoplasmons in a monolayer of silicene or germanene

Tahir

Vasilopoulos

2015

J. Phys.: Condens. Matter

Self Cite

View full text Add to dashboard Cite

show abstract

“…Àℏ! À i and 20 A similar expression for the polarizability has also been obtained by Berman et al (2008) and Tahir and Sabeeh (2008), although with approximate form factors.…”

Section: Polarizability For Bþ0mentioning

confidence: 53%

Electronic properties of graphene in a strong magnetic field

2011

View full text Add to dashboard Cite

The basic aspects of electrons in graphene (two-dimensional graphite) exposed to a strong perpendicular magnetic field are reviewed. One of its most salient features is the relativistic quantum Hall effect, the observation of which has been the experimental breakthrough in identifying pseudorelativistic massless charge carriers as the low-energy excitations in graphene. The effect may be understood in terms of Landau quantization for massless Dirac fermions, which is also the theoretical basis for the understanding of more involved phenomena due to electronic interactions. The role of electron-electron interactions both in the weakcoupling limit, where the electron-hole excitations are determined by collective modes, and in the strong-coupling regime of partially filled relativistic Landau levels are presented. In the latter limit, exotic ferromagnetic phases and incompressible quantum liquids are expected to be at the origin of recently observed (fractional) quantum Hall states. Furthermore, the electronphonon coupling in a strong magnetic field is discussed. Although the present review has a dominant theoretical character, a close connection with available experimental observation is intended.

show abstract

“…where F nn ′ (q) are the Landau level form factors (see the details in [5,[38][39][40][41][42]). Note that the statically screened interaction was also used in [34][35][36] to analyze possible spontaneous symmetry breaking and gap generation scenarios.…”

Section: Theoretical Modelmentioning

confidence: 99%

Many-body renormalization of Landau levels in graphene due to screened Coulomb interaction

Sokolik

Lozovik

2018

Phys. Rev. B

View full text Add to dashboard Cite

Renormalization of Landau level energies in graphene in strong magnetic field due to Coulomb interaction is studied theoretically, and calculations are compared with two experiments on carrierdensity dependent scanning tunneling spectroscopy. An approximate preservation of the square-root dependence of the energies of Landau levels on their numbers and magnetic field in the presence of the interaction is examined. Many-body calculations of the renormalized Fermi velocity with the statically screened interaction taken in the random-phase approximation show good agreement with both experiments. The crucial role of the screening in achieving quantitative agreement is found. The main contribution to the observed rapid logarithmic growth of the renormalized Fermi velocity on approach to the charge neutrality point turned out to be caused not by mere exchange interaction effects, but by weakening of the screening at decreasing carrier density. The importance of a self-consistent treatment of the screening is also demonstrated.

show abstract

Inter-band magnetoplasmons in mono- and bilayer graphene

Cited by 17 publications

References 31 publications

Electrically tunable magnetoplasmons in a monolayer of silicene or germanene

Electrically tunable magnetoplasmons in a monolayer of silicene or germanene

Electronic properties of graphene in a strong magnetic field

Many-body renormalization of Landau levels in graphene due to screened Coulomb interaction

Contact Info

Product

Resources

About