Year: 2000
Type: article
Abstract: We investigate the ground-state magnetization plateaus appearing in spin-$\frac{1}{2}$ two-leg ladders built up from dimerized antiferromagnetic Heisenberg chains and dimerized zig-zag interchain couplings. Using both Abelian bosonization and Lanczos methods we find that the system yields rather unusual plateaus and exhibits massive and massless phases for specific choices or ``tuning'' of exchange interactions. The relevance of this behavior in the study of ${\mathrm{NH}}_{4}{\mathrm{CuCl}}_{3}$ is discussed.
Authors: D. C. Cabra, M. D. Grynberg
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: G4804752092, G7378882120
OpenAlex ID: W1997752997