Pith. sign in

REVIEW 3 cited by

Hundness in twisted bilayer graphene: correlated gaps and pairing

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2412.03108 v1 pith:22CCUSLS submitted 2024-12-04 cond-mat.str-el cond-mat.mes-hall

Seongyeon Youn , Beomjoon Goh , Geng-Dong Zhou , Zhi-Da Song , Seung-Sup B. Lee This is my paper · ORCID
classification cond-mat.str-elcond-mat.mes-hall
keywords lesssimbilayerdynamicalgraphenehundnesspairingtwistedanti-hund
verification ladder T0 review T1 audit T2 compute T3 formal
0 comments
abstract

We characterize gap-opening mechanisms in the topological heavy fermion (THF) model of magic-angle twisted bilayer graphene (MATBG), with and without electron-phonon coupling, using dynamical mean-field theory (DMFT) with the numerical renormalization group (NRG) impurity solver. In the presence of symmetry breaking associated with valley-orbital ordering (time-reversal-symmetric or Kramers intervalley coherent, or valley polarized), spin anti-Hund and orbital-angular-momentum Hund couplings, induced by the dynamical Jahn-Teller effect, result in a robust pseudogap at filling $2 \lesssim |\nu| \lesssim 2.5$. We also find that Hundness enhances the pairing susceptibilities for $1.6 \lesssim |\nu| \lesssim 2.8$, which might be a precursor to the superconducting phases neighboring $|\nu| = 2$.

Discussion (0). Continue with ORCID to comment.

Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Resolving Intervalley Gaps and Many-Body Resonances in Moir\'e Superconductor

    cond-mat.supr-con 2025-05 conditional novelty 7.0 of 10

    In magic-angle twisted trilayer graphene, two gaps coexist at the Fermi level: an inner superconducting gap and an outer gap from intervalley coherence, with the outer gap arising from a split many-body resonance.

  2. Interplay between many-body correlations, strain and lattice relaxation in twisted bilayer graphene

    cond-mat.str-el 2025-09 conditional novelty 6.0 of 10

    Strain splitting of the flat bands plus relaxation-induced particle-hole asymmetry in a DMFT treatment of the heavy-fermion model accounts for the persistent ~10 meV STM/QTM feature, the entropy behavior, and the asym...

  3. Mixed valence Mott insulator and composite excitation in twisted bilayer graphene

    cond-mat.str-el 2025-06 conditional novelty 5.0 of 10

    At ν=-2, twisted bilayer graphene is argued to host a mixed valence Mott insulator where the f orbital is a superposition of f2+ and f3+, with a low-energy composite excitation near Γ.

Pith tools