32 citations · 125 across the 15 of their papers we have counts for
11 papers · 1 filter
Fermi surface change and -wave superconductivity in the square lattice Kondo-Heisenberg model
Alexander Nikolaenko, Riccardo Rende, Luciano Loris Viteritti +2
We study the two-dimensional Kondo-Heisenberg model on a square lattice, with the conduction electrons away from half-filling, using neural network quantum states. Mapping the grou…
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…
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…
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…
Fractionalized Fermi liquids and the cuprate phase diagram
Pietro M. Bonetti, Maine Christos, Alexander Nikolaenko +2
We review a theoretical framework for the cuprate superconductors, rooted in a fractionalized Fermi liquid (FL*) description of the intermediate-temperature pseudogap phase at low…
Canted magnetism and fractionalization in metallic states of the Lieb lattice Hubbard model near quarter filling
Alexander Nikolaenko, Pietro M. Bonetti, Anant Kale +3
A recent experiment has examined ultracold, fermionic, spin-1/2 Li atoms in the Lieb lattice at different Hubbard repulsion and filling fractions (Lebrat et al. arXiv:2…
Numerical signatures of ultra-local criticality in a one dimensional Kondo lattice model
Alexander Nikolaenko, Ya-Hui Zhang
Heavy fermion criticality has been a long-standing problem in condensed matter physics. Here we study a one-dimensional Kondo lattice model through numerical simulation and observe…
Theory of shot noise in strange metals
Alexander Nikolaenko, Subir Sachdev, Aavishkar A. Patel
We extend the theory of shot noise in coherent metals to shot noise in strange metals without quasiparticle excitations. This requires a generalization of the Boltzmann equation wi…
Spin density wave, Fermi liquid, and fractionalized phases in a theory of antiferromagnetic metals using paramagnons and bosonic spinons
Alexander Nikolaenko, Jonas von Milczewski, Darshan G. Joshi +1
The pseudogap metal phase of the hole-doped cuprates can be described by small Fermi surfaces of electron-like quasiparticles, which enclose a volume violating the Luttinger relati…
Electronic spectra with paramagnon fractionalization in the single band Hubbard model
Eric Mascot, Alexander Nikolaenko, Maria Tikhanovskaya +3
We examine the spectral properties of a recently proposed theory of the intermediate temperature pseudogap metal phase of the cuprates. We show that this theory can be obtained fro…
Small to large Fermi surface transition in a single band model, using randomly coupled ancillas
Alexander Nikolaenko, Maria Tikhanovskaya, Subir Sachdev +1
We describe a solvable model of a quantum transition in a single band model involving a change in the size of the electron Fermi surface without any symmetry breaking. In a model w…