Hidden String Order in a Hole Superconductor with Extended Correlated Hopping
Ravindra W. Chhajlany, Przemysław R. Grzybowski, Julia Stasińska, Maciej Lewenstein, Omjyoti Dutta
DOI 10.1103/PhysRevLett.116.225303 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Ultracold fermions in one-dimensional, spin-dependent nonoverlapping optical lattices are described by a nonstandard Hubbard model with next-nearest-neighbor correlated hopping. In the limit of a kinetically constraining value of the correlated hopping equal to the normal hopping, we map the invariant subspaces of the Hamiltonian exactly to free spinless fermion chains of varying lengths. As a result, the system exactly manifests spin-charge separation and we obtain the system properties for arbitrary filling: ground state collective order characterized by a spin gap, which can be ascribed to an unconventional critical hole superconductor associated with finite long range nonlocal string order. We study the system numerically away from the integrable point and show the persistence of both long range string order and spin gap for appropriate parameters as well as a transition to a ferromagnetic state.
Similar papers
Chiral spin states, hole dynamics, and superconductivity in strongly correlated electronic systems
similarity 0.89N. I. Karchev
Source status unknown — claims are unverified
Dominant superconducting fluctuations in the one-dimensional extended Holstein–extended Hubbard model
similarity 0.89Ka-Ming Tam et al.
Source status unknown — claims are unverified
Magnetically induced superconducting correlations: Bogolyubov–de Gennes calculations of the gap profile in a superconductor with magnetic order
similarity 0.89P. D. Sacramento et al.
Source status unknown — claims are unverified
Superconductivity in a Hubbard-Fröhlich model and in cuprates
similarity 0.87T. M. Hardy et al.
Source status unknown — claims are unverified
The Transformation of the Superconducting Gap to an Insulating Pseudogap at a Critical Hole Density in the Cuprates
similarity 0.87Ye-Hua Liu et al. · 2017 · arXiv:1703.03695
Source status unknown — claims are unverified
Superconductivity from Doublon Condensation in the Ionic Hubbard Model
similarity 0.87Abhisek Samanta & Rajdeep Sensarma · 2016 · arXiv:1607.02512
Source status unknown — claims are unverified