Results 101 to 110 of about 266,938 (298)
Exact Transformation for Spin-Charge Separation of Spin-half Fermions without Constraints
, 2006 We demonstrate an exact local transformation which maps a purely Fermionic manybody system to a system of spinfull Bosons and spinless Fermions, demonstrating a possible path to a non-Fermi liquid state. We apply this to the half-filled Hubbard model and
E. Fradkin +3 more
core +1 more source
Superconductivity in the Repulsive Hubbard Model [PDF]
Journal of Superconductivity and Novel Magnetism, 2010 The two-dimensional repulsive Hubbard model has been investigated by a variety of methods, from small to large U. Superconductivity with d-wave symmetry is consistently found close to half filling. After a brief review of the various methods a variational many-electron state is discussed in more detail.
openaire +4 more sources
Advanced Science, EarlyView.Interlayer sliding in the RuO2Zn2F2 bilayer induces ferroelectricity and enables reversible valley polarization switching. The electric dipole and valley‐resolved band edges are intimately coupled, revealing sliding ferroelectricity as a powerful mechanism for electrical control of valley degrees of freedom in 2D materials.
Djamel Bezzerga +3 more
wiley +1 more source
Electronic spectrum and superconductivity in Hubbard model
Condensed Matter Physics, 2008 A microscopic theory of electronic spectrum and superconducting pairing within the Hubbard model is formulated. The Dyson equation for the normal and anomalous Green functions in terms of the Hubbard operators is derived by applying the Mori-type ...
N.M. Plakida, V.S. Oudovenko
doaj +1 more source
Pair correlations in the attractive Hubbard model
Physical Review Research, 2020 The mechanism of fermionic pairing is the key to understanding various phenomena such as high-temperature superconductivity and the pseudogap phase in cuprate materials.
C. F. Chan, M. Gall, N. Wurz, M. Köhl
doaj +1 more source
Control of the finite size corrections in exact diagonalization studies
, 1995 We study the possibility of controlling the finite size corrections in exact diagonalization studies quantitatively. We consider the one- and two dimensional Hubbard model.
C. Gros +6 more
core +1 more source
Advanced Science, EarlyView.The 3rd‐generation magnetic super‐stable mineralizer M‐MgAl‐700 features a core‐shell structure, strong superparamagnetism, large surface area, and abundant oxygen defects. It achieves exceptional Cd(II) and As(V) mineralization capacities, reducing both pollutants in co‐contaminated water and soil to meet national standards.
Haoran Wang +9 more
wiley +1 more source
Exact Ground States for Quasi 1D Systems with Hubbard Interaction [PDF]
Журнал нано- та електронної фізики, 2012 Using a positive semidefinite operator technique we deduced exact ground states for a modified diamond chain described by a non-integrable Hubbard model with on-site repulsion.
Zs. Gulácsi, E. Kovács
doaj
Zero Modes and Global Antiferromagnetism in Strained Graphene
Physical Review X, 2014 A novel magnetic ground state is reported for the Hubbard Hamiltonian in strained graphene. When the chemical potential lies close to the Dirac point, the ground state exhibits locally both the Néel and ferromagnetic orders, even for weak Hubbard ...
Bitan Roy +2 more
doaj +1 more source
Antiferromagnetic fluctuations in the one-dimensional Hubbard model
AIP Advances, 2020 We study the low-temperature critical behavior of the one-dimensional Hubbard model near half filling caused by enhanced antiferromagnetic fluctuations.
Václav Janiš +2 more
doaj +1 more source