Publications by authors named "Pietro M Bonetti"
Quantum oscillations in the hole-doped cuprates and the confinement of spinons.
Proc Natl Acad Sci U S A
December 2024
A long-standing problem in the study of the under-hole-doped cuprates has been the description of the Fermi surfaces underlying the high magnetic field quantum oscillations, and their connection to the higher temperature pseudogap metal. Harrison and Sebastian [ , 226402 (2011)] proposed that the pseudogap "Fermi arcs" are reconstructed into an electron pocket by field-induced charge density wave order. But computations on such a model [Zhang and Mei, , 47008 (2016)] show an unobserved additional oscillation frequency from a Fermi surface arising from the backsides of the hole pockets completing the Fermi arcs.
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- The study explores the advantages of the new single-boson exchange (SBE) method applied to the one-loop functional renormalization group (fRG) in analyzing the two-dimensional Hubbard model on a square lattice.
- It examines how fermion-boson Yukawa couplings and physical susceptibilities change with temperature and interaction strength, revealing that SBE simplifies calculations significantly compared to traditional fRG methods, especially in weak-coupling scenarios.
- Additionally, the SBE method maintains finite values at the pseudo-critical transition, unlike conventional fRG, leading to reduced numerical complexity, which could benefit future advanced multiboson research.