@article{ISI:000077943800080,
 abstract = {The experimental realization of various spin ladder systems has prompted
their detailed theoretical investigations. Hen we study the evolution of
ground-state magnetization with an external magnetic field for two
different antiferromagnetic systems: a three-legged spin-1/2 ladder, and
a two-legged spin-1/2 ladder with an additional diagonal interaction.
The finite system density-matrix renormalization-group method is
employed for numerical studies of the three-chain system, and an
effective low-energy Hamiltonian is used in the limit of strong
interchain coupling to study the two- and three-chain systems. The
three-chain system has a magnetization plateau at one-third of the
saturation magnetization. The two-chain system has a plateau at zero
magnetization due to a gap above the singlet ground state. It also has a
plateau at half of the saturation magnetization for a certain range of
values of the couplings. We study the regions of transitions between
plateaus numerically and analytically, and find that they are described,
at first order in a strong-coupling expansion, by an XXZ spin-1/2 chain
in a magnetic field; the second-order terms give corrections to the XXZ
model, We also study numerically some low-temperature properties of the
three-chain system, such as the magnetization, magnetic susceptibility
and specific heat. [S0163-1829(99)303001-5].},
 author = {Tandon, K and Lal, S and Pati, SK and Ramasesha, S and Sen, D},
 doi = {10.1103/PhysRevB.59.396},
 eissn = {2469-9969},
 issn = {2469-9950},
 journal = {PHYSICAL REVIEW B},
 month = {JAN 1},
 number = {1},
 pages = {396-410},
 researcherid-numbers = {Pati, Swapan/C-5622-2009
Lal, Siddhartha/A-1414-2013},
 times-cited = {58},
 title = {Magnetization properties of some quantum spin ladders},
 unique-id = {ISI:000077943800080},
 volume = {59},
 year = {1999}
}