Magnetic interactions in molecules and highly correlated materials: physical content, analytical derivation, and rigorous extraction of magnetic Hamiltonians

JP Malrieu, R Caballol, CJ Calzado, C De Graaf… - Chemical …, 2014 - ACS Publications
Magnetism is a phenomenon that has always captured the imagination of humans. Its
discovery in the western world is attributed to the ancient Greek civilization. More than 2500 …

Remarks on the proper use of the broken symmetry approach to magnetic coupling

R Caballol, O Castell, F Illas… - The Journal of …, 1997 - ACS Publications
The effect of nonorthogonality in the broken symmetry approach to magnetic coupling has
been explicitly considered for the first time in Hartree− Fock and a variety of DFT methods …

Effect of Fock exchange on the electronic structure and magnetic coupling in NiO

I de PR Moreira, F Illas, RL Martin - Physical Review B, 2002 - APS
The effect of Fock exchange on the periodic description of the geometrical structure, elastic
constants, and electronic and magnetic properties of NiO is analyzed. Hybrid density …

Spin exchange interactions and magnetic structures of extended magnetic solids with localized spins: theoretical descriptions on formal, quantitative and qualitative …

MH Whangbo, HJ Koo, D Dai - Journal of Solid State Chemistry, 2003 - Elsevier
Low-energy excitation energies of a magnetic solid with localized spins are probed by
magnetic susceptibility, neutron scattering and Raman scattering measurements, and are …

Antiferromagnetic exchange interactions from hybrid density functional theory

RL Martin, F Illas - Physical review letters, 1997 - APS
A hybrid theory which combines the full nonlocal “exact” exchange interaction with the local
spin-density approximation of density-functional theory is shown to lead to marked …

A unified view of the theoretical description of magnetic coupling in molecular chemistry and solid state physics

I de PR Moreira, F Illas - Physical Chemistry Chemical Physics, 2006 - pubs.rsc.org
The magnetic interactions in organic diradicals, dinuclear inorganic complexes and ionic
solids are presented from a unified point of view. Effective Hamiltonian theory is revised to …

Ab initio modeling of the metal− support interface: the interaction of Ni, Pd, and Pt on MgO (100)

N López, F Illas - The Journal of Physical Chemistry B, 1998 - ACS Publications
The interaction of Ni, Pd, and Pt on MgO has been investigated using cluster models and a
variety of ab initio techniques. The case of a single Pd atom with acidic and basic sites of the …

Magnetic coupling in ionic solids studied by density functional theory

F Illas, RL Martin - The Journal of chemical physics, 1998 - pubs.aip.org
Magnetic coupling in ionic solids is studied using a density functional theory, DFT, approach
applied to suitable cluster models representing KNiF3, K2NiF4, and La2CuO4. A mapping …

Normal-state magnetic properties of single-layer cuprate high-temperature superconductors and related materials

DC Johnston - Handbook of Magnetic Materials, 1997 - Elsevier
The remarkable discovery of superconductivity above 30 K in the La-Ba-Cu-O system
(Bednorz and MUller 1986, Mtiller and Bednorz 1987, Bednorz et al. 1987a, 1987b, 1987c) …

Heisenberg exchange enhancement by orbital relaxation in cuprate compounds

AB Van Oosten, R Broer, WC Nieuwpoort - Chemical physics letters, 1996 - Elsevier
We calculate the Heisenberg exchange J in the quasi-2D antiferromagnetic cuprates
La2CuO4, YBa2Cu3O6, Nd2CuO4 and Sr2CuO2Cl2. We apply all-electron (MC) SCF and …