Magnetic light scattering in low-dimensional quantum spin systems
P Lemmens, G Güntherodt, C Gros - Physics Reports, 2003 - Elsevier
An overview of one-and two-dimensional quantum spin systems based on transition-metal
oxides and halides of current interest is given, such as spin-Peierls, spin-dimer …
oxides and halides of current interest is given, such as spin-Peierls, spin-dimer …
Tunable topological phases in nanographene-based spin-1/2 alternating-exchange Heisenberg chains
Unlocking the potential of topological order in many-body spin systems has been a key goal
in quantum materials research. Despite extensive efforts, the quest for a versatile platform …
in quantum materials research. Despite extensive efforts, the quest for a versatile platform …
Ab initio molecular crystal structures, spectra, and phase diagrams
Conspectus Molecular crystals are chemists' solids in the sense that their structures and
properties can be understood in terms of those of the constituent molecules merely …
properties can be understood in terms of those of the constituent molecules merely …
Numerical evidence for multiplicative logarithmic corrections from marginal operators
S Eggert - Physical Review B, 1996 - APS
Field theory calculations predict multiplicative logarithmic corrections to correlation functions
from marginally irrelevant operators. However, for the numerically most suitable model, the …
from marginally irrelevant operators. However, for the numerically most suitable model, the …
Electronic states and magnetic properties of edge-sharing Cu-O chains
The electronic states and magnetic properties for the copper oxides containing edge-sharing
Cu-O chains such as Li 2 CuO 2, La 6 Ca 8 Cu 24 O 41, and CuGeO 3 are systematically …
Cu-O chains such as Li 2 CuO 2, La 6 Ca 8 Cu 24 O 41, and CuGeO 3 are systematically …
Gapless spin liquid and valence-bond solid in the - Heisenberg model on the square lattice: Insights from singlet and triplet excitations
The spin-1/2 J 1-J 2 Heisenberg model on the square lattice represents one of the simplest
examples in which the effects of magnetic interactions may suppress magnetic order …
examples in which the effects of magnetic interactions may suppress magnetic order …
Perturbation theory by flow equations: dimerized and frustrated S= 1/2 chain
C Knetter, GS Uhrig - The European Physical Journal B-Condensed …, 2000 - Springer
The flow equation method (Wegner, 1994) is used as continuous unitary transformation to
construct perturbatively effective Hamiltonians. The method is illustrated in detail for …
construct perturbatively effective Hamiltonians. The method is illustrated in detail for …
Influence of side groups on 90 superexchange: A modification of the Goodenough-Kanamori-Anderson rules
W Geertsma, D Khomskii - Physical Review B, 1996 - APS
A mechanism is suggested which can modify in certain cases the Goodenough-Kanamori-
Anderson rules determining the character of superexchange in magnetic insulators; namely …
Anderson rules determining the character of superexchange in magnetic insulators; namely …
Spontaneous Plaquette Dimerization in the Heisenberg Model
We investigate the nonmagnetic phase of the spin-half frustrated Heisenberg
antiferromagnet on the square lattice using exact diagonalization (up to 36 sites) and …
antiferromagnet on the square lattice using exact diagonalization (up to 36 sites) and …
Magnetization plateau in the Heinsenberg spin chain with next-nearest-neighbor and alternating nearest-neighbor interactions
K Totsuka - Physical Review B, 1998 - APS
The magnetization process of the S= 1/2 Heisenberg chain with next-nearest-neighbor
(NNN) and alternating nearest-neighbor interactions is investigated using the bosonization …
(NNN) and alternating nearest-neighbor interactions is investigated using the bosonization …