9 papers
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…
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…
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…
Theory of Sondheimer magneto-oscillations beyond semiclassical limit
Alexander Nikolaenko, Pavel A. Nosov
In conducting films subjected to an out-of-plane magnetic field, electron motion along the field direction gives rise to conductance oscillations periodic in field intensity - a ph…