Band Structure and Superconductivity in Twisted Trilayer Graphene

Vo Tien Phong; Pierre A. Pantaleón; Tommaso Cea; Francisco Guinea

doi:10.1103/PhysRevB.104.L121116

Band Structure and Superconductivity in Twisted Trilayer Graphene

Mesoscale and Nanoscale Physics 2021-10-04 v1 Strongly Correlated Electrons Superconductivity

Authors: Vo Tien Phong , Pierre A. Pantaleón , Tommaso Cea , Francisco Guinea

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

We study the symmetries of twisted trilayer graphene's band structure under various extrinsic perturbations, and analyze the role of long-range electron-electron interactions near the first magic angle. The electronic structure is modified by these interactions in a similar way to twisted bilayer graphene. We analyze electron pairing due to long-wavelength charge fluctuations, which are coupled among themselves via the Coulomb interaction and additionally mediated by longitudinal acoustic phonons. We find superconducting phases with either spin singlet/valley triplet or spin triplet/valley singlet symmetry, with critical temperatures of up to a few Kelvin for realistic choices of parameters.

Keywords

twisted trilayer graphene band structure superconductivity magic angle electron-electron interactions charge fluctuations

Cite

@article{arxiv.2106.15573,
  title  = {Band Structure and Superconductivity in Twisted Trilayer Graphene},
  author = {Vo Tien Phong and Pierre A. Pantaleón and Tommaso Cea and Francisco Guinea},
  journal= {arXiv preprint arXiv:2106.15573},
  year   = {2021}
}

Comments

14 pages, 8 figures

Band Structure and Superconductivity in Twisted Trilayer Graphene

Abstract

Keywords

Cite

Comments

Related papers