Superconducting states in pseudo-Landau-levels of strained graphene.

@article{Uchoa2013SuperconductingSI,
  title={Superconducting states in pseudo-Landau-levels of strained graphene.},
  author={Bruno Uchoa and Yafis Barlas},
  journal={Physical review letters},
  year={2013},
  volume={111 4},
  pages={
          046604
        }
}
We describe the formation of superconducting states in graphene in the presence of pseudo-Landau-levels induced by strain, when time reversal symmetry is preserved. We show that superconductivity in strained graphene is quantum critical when the pseudo-Landau-levels are completely filled, whereas at partial fillings superconductivity survives at weak coupling. In the weak coupling limit, the critical temperature scales linearly with the coupling strength and shows a sequence of quantum critical… 

Figures from this paper

Pseudo-Landau levels of Bogoliubov quasiparticles in strained nodal superconductors

Motivated by theory and experiments on strain induced pseudo-Landau levels (LLs) of Dirac fermions in graphene and topological materials, we consider its extension for Bogoliubov quasiparticles (QPs)

Helical superconducting edge modes from pseudo-Landau levels in graphene

We explore Andreev states at the interface of graphene and a superconductor for a uniform pseudo-magnetic field. Near the zeroth-pseudo Landau level, we find a topological transition as a function of

Superconducting states and Majorana modes in transition-metal dichalcogenides under inhomogeneous strain

We study the effect of inhomogeneous strain on transition-metal dichalcogenides with a large intrinsic gap in their spectrum. It is found that, by tuning the chemical potential, superconductivity can

Observation of unconventional splitting of Landau levels in strained graphene

In strained graphene, lattice deformation can create pseudo-magnetic fields and result in zero-field Landau level-like quantization. In the presence of an external magnetic field, valley-polarized

Landau levels from neutral Bogoliubov particles in two-dimensional nodal superconductors under strain and doping gradients

Motivated by recent work on strain-induced pseudomagnetic fields in Dirac and Weyl semimetals, we analyze the possibility of analogous fields in two-dimensional nodal superconductors. We consider the

Superconducting proximity effect in flat band systems

There is a critical value for chemical potential of the superconductors depending on paring interaction strength over which for undoped normal region the proximity effect is enhanced, and the supercurrent passing through the junction is large when the superconductor chemical potential is smaller than the critical value which increases as a function of normal region chemical potential.

Inhomogeneous superconductivity in the presence of time-reversal symmetry

We propose a new type of non-uniform condensate state in the presence of time-reversal symmetry. The underlying platform of this state is a corrugated honeycomb lattice which exhibits an

Flat-band superconductivity in periodically strained graphene: mean-field and Berezinskii–Kosterlitz–Thouless transition

In the flat-band regime the order parameter magnitude, critical chemical potential, critical temperature, superfluid weight, and BKT transition temperature are all approximately linear in the interaction strength, which suggests that high-temperature superconductivity might be feasible in this system.

Determination of gap solution and critical temperature in doped graphene superconductivity

It is shown that the gap solution and critical transition temperature are significantly enhanced by doping in a recently developed BCS formalism for graphene superconductivity in such a way that

References

SHOWING 1-10 OF 18 REFERENCES

Introduction to Superconductivity

We have seen how the conductivity of a metal is limited by collisions, which determine the electron mean free path. After a collision, an electron completely loses all memory of its quantum state as

ET

. — The holotype of Proctotretus signifer Dum. et Bibr., 1837, considered as lost since 1851, has been found again in the Paris Museum material that was catalogued as a type-series of P. fitzingerii

Phys

  • Rev. Lett. 109, 066802
  • 2012

Phys

  • Rev. Lett. 63, 2425
  • 1989

A similar scaling was predicted in the flat bands of rhombohedral graphite. See for instance

  • 2012

As = 1 2 Bs(−y, x), where angular momentum is a good quantum number, superconductivity is described by pairs of electrons with opposite angular momenta in a given LL

    Phys

    • Rev. Lett. 98, 146801
    • 2007

    A similar scaling was predicted in the flat bands of rhombohedral graphite. See for instance

    • Phys. Rev. B
    • 2011

    Phys

    • Rev. B 84, 241401
    • 2011

    Cond

    • Matter 17, R995
    • 2005