11 papers · 1 filter
From Ferrimagnetic Insulator to superconducting Luther-Emery Liquid: A DMRG Study of the Two-Leg Lieb Lattice
Alexander Nikolaenko, Subir Sachdev
Motivated by recent experiments on ultracold fermionic spin-1/2 Li atoms in a Lieb lattice at various Hubbard repulsion and filling fractions (Lebrat et al., arXiv:2404…
Superconductivity and fractionalized magnetic excitations in CeCoIn5
Pyeongjae Park, Shang-Shun Zhang, Pietro M. Bonetti +8
Recent experiments on CeCoIn5 -- a prototypical d-wave superconductor -- indicate that its normal state lies near an unconventional quantum critical point (QCP). One intriguing hyp…
Sondheimer magneto-oscillations as a probe of Fermi surface reconstruction in underdoped cuprates
Alexander Nikolaenko, Carsten Putzke, Philip J. W. Moll +2
Determining the Fermi surface (FS) volume in underdoped cuprates is crucial for understanding the nature of the strongly correlated pseudogap phase. Conventional quantum oscillatio…
Unifying Dirac Spin Liquids on Square and Shastry-Sutherland Lattices via Fermionic Deconfined Criticality
Andreas Feuerpfeil, Leyna Shackleton, Atanu Maity +3
We present a fermionic gauge theory for deconfined quantum criticality on the Shastry-Sutherland lattice and reveal its shared low-energy field-theoretic structure with the square…
Steady-states and response functions of the periodically driven O(N) scalar field theory
Oriana K. Diessel, Subir Sachdev, Pietro M. Bonetti
We investigate the phase diagram of a relativistic, parametrically driven O()-symmetric theory coupled to a Markovian thermal bath. Our analysis reveals a rich variety of phases…
Fermionic spinon theory of the hourglass spin excitation spectrum of the cuprates
Alexander Nikolaenko, Pietro M. Bonetti, Subir Sachdev
We present a theory for the spin fluctuation spectrum of the hole-doped cuprates in a ground state with period 4 unidirectional charge density wave (`stripe') order. Motivated by r…