Inter-valley coherent order and isospin fluctuation mediated superconductivity in rhombohedral trilayer graphene

S Chatterjee, T Wang, E Berg, MP Zaletel - Nature communications, 2022 - nature.com
Superconductivity was recently discovered in rhombohedral trilayer graphene (RTG) in the
absence of a moiré potential. Superconductivity is observed proximate to a metallic state …

Overdo** graphene beyond the van Hove singularity

P Rosenzweig, H Karakachian, D Marchenko… - Physical Review Letters, 2020 - APS
At very high do** levels the van Hove singularity in the π* band of graphene becomes
occupied and exotic ground states possibly emerge, driven by many-body interactions …

Superfluid weight and Berezinskii-Kosterlitz-Thouless transition temperature of twisted bilayer graphene

A Julku, TJ Peltonen, L Liang, TT Heikkilä, P Törmä - Physical Review B, 2020 - APS
We study superconductivity of twisted bilayer graphene with local and nonlocal attractive
interactions. We obtain the superfluid weight and Berezinskii-Kosterlitz-Thouless (BKT) …

Unconventional superconductivity in systems with annular fermi surfaces: Application to rhombohedral trilayer graphene

A Ghazaryan, T Holder, M Serbyn, E Berg - Physical review letters, 2021 - APS
We show that in a two-dimensional electron gas with an annular Fermi surface, long-range
Coulomb interactions can lead to unconventional superconductivity by the Kohn-Luttinger …

Bogoliubov Fermi surfaces in superconductors with broken time-reversal symmetry

DF Agterberg, PMR Brydon, C Timm - Physical review letters, 2017 - APS
It is commonly believed that, in the absence of disorder or an external magnetic field, there
are three possible types of superconducting excitation gaps: The gap is nodeless, it has …

Pair-density-wave and chiral superconductivity in twisted bilayer transition metal dichalcogenides

YM Wu, Z Wu, H Yao - Physical Review Letters, 2023 - APS
We theoretically explore possible orders induced by weak repulsive interactions in twisted
bilayer transition metal dichalcogenides (eg, WSe 2) in the presence of an out-of-plane …

Competing orders at higher-order Van Hove points

L Classen, AV Chubukov, C Honerkamp, MM Scherer - Physical Review B, 2020 - APS
Van Hove points are special points in the energy dispersion, where the density of states
exhibits analytic singularities. When a Van Hove point is close to the Fermi level, tendencies …

Correlated metals and unconventional superconductivity in rhombohedral trilayer graphene: A renormalization group analysis

DC Lu, T Wang, S Chatterjee, YZ You - Physical Review B, 2022 - APS
Motivated by recent experimental observations of correlated metallic phases and
superconductivity in rhombohedral trilayer graphene (RTG), we perform an unbiased study …

Evidence for chiral superconductivity on a silicon surface

F Ming, X Wu, C Chen, KD Wang, P Mai, TA Maier… - Nature Physics, 2023 - nature.com
Tin adatoms on a Si (111) substrate with a one-third monolayer coverage form a two-
dimensional triangular lattice with one unpaired electron per site. These electrons order into …

Bogoliubov Fermi surfaces: General theory, magnetic order, and topology

PMR Brydon, DF Agterberg, H Menke, C Timm - Physical Review B, 2018 - APS
We present a comprehensive theory for Bogoliubov Fermi surfaces in inversion-symmetric
superconductors which break time-reversal symmetry. A requirement for such a gap …