227 citations · 2.3k across the 98 of their papers we have counts for
6 papers · 1 filter
Ground state and low-lying excitations of the spin-1/2 XXZ model on the kagome lattice at magnetization 1/3
A. Honecker, D. C. Cabra, M. D. Grynberg +5
We study the ground state and low-lying excitations of the S=1/2 XXZ antiferromagnet on the kagome lattice at magnetization one third of the saturation. An exponential number of no…
Bound states in weakly disordered spin ladders
M. Arlego, W. Brenig, D. C. Cabra +3
We study the appearance of bound states in the spin gap of spin-1/2 ladders induced by weak bond disorder. Starting from the strong-coupling limit, i.e., the limit of weakly couple…
Thermal conductivity of one-dimensional spin-1/2 systems
F. Heidrich-Meisner, A. Honecker, D. C. Cabra +1
We analyze the thermal conductivity of frustrated spin-1/2 chains within linear-response theory focusing on its frequency dependence at finite temperatures. Using exact diagonaliza…
Transport in dimerized and frustrated spin systems
F. Heidrich-Meisner, A. Honecker, D. C. Cabra +1
We analyze the Drude weight for both spin and thermal transport of one-dimensional spin-1/2 systems by means of exact diagonalization at finite temperatures. While the Drude weight…
Quantum kagome antiferromagnet in a magnetic field: Low-lying non-magnetic excitations versus valence-bond crystal order
D. C. Cabra, M. D. Grynberg, P. C. W. Holdsworth +5
We study the ground state properties of a quantum antiferromagnet on the kagome lattice in the presence of a magnetic field, paying particular attention to the stability of the pla…
Bond-impurity induced bound states in disordered spin-1/2 ladders
M. Arlego, W. Brenig, D. C. Cabra +3
We discuss the effect of weak bond-disorder in two-leg spin ladders on the dispersion relation of the elementary triplet excitations with a particular focus on the appearance of bo…