Repulsive interactions of a lipid membrane with graphene in composite materials

Repulsive interactions of a lipid membrane with graphene in composite materials.

The van der Waals interaction between a lipid membrane and a substrate covered by a graphene sheet is investigated using the Lifshitz theory. The reflection coefficients are obtained for a layered planar system submerged in water. The dielectric response properties of the involved materials are also specified and discussed. Our calculations show that a graphene covered substrate can repel the b...

Chiral superconductivity from repulsive interactions in doped graphene

Chiral superconductivity, which breaks time-reversal symmetry, can exhibit a wealth of fascinating properties that are highly sought after for nanoscience applications. We identify doped graphene monolayer as a system where chiral superconductivity can be realized. In this material, a unique situation arises at a doping where the Fermi surface is nested and the density of states is singular. In...

Synthesis of Graphene and Graphene-Based Composite Membrane

Ultracold fermions with repulsive interactions

An ultracold Fermi gas with repulsive interaction has been studied. For weak interactions, the atomic gas is metastable, and the interactions were characterized by obtaining the isothermal compressibility from atomic density profiles. For stronger interactions (kFa  1), rapid conversion into Feshbach molecules is observed. When the conversion rate becomes comparable to the Fermi energy divided...

Spinless Fermions with Repulsive Interactions

In this paper, we discuss the mean-field treatment of fermionic systems and the critical properties near the phase transitions at zero and finite temperature, respectively. Specifically, we consider the spinless fermion hopping on a square lattice, with nearest-neighbor repulsive interactions. We found that at intermediate repulsion strength there is a second-order phase transition from the Fer...