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cond-mat.str-el2007★ 29 cited
Quantum Criticality in Dimerized Spin Ladders
Gennady Y. Chitov, Brandon W. Ramakko, Mohamed Azzouz
We analyze a possibility of quantum criticality (gaplessness) in dimerized antiferromagnetic two- and three-leg spin-1/2 ladders. Contrary to earlier studies of these models, we ex…
cond-mat.str-el2007★ 15 cited
Effect of temperature on quantum criticality in the frustrated two-leg Heisenberg ladder
Brandon W. Ramakko, Mohamed Azzouz
The antiferromagnetic Heisenberg model on the two-leg ladder with exchange interactions along the chains, rungs, and diagonals is studied using the Jordan-Wigner transformation and…
cond-mat.str-el2004★ 3 cited
The Spin-SAF transition in NaV2O5 induced by spin-pseudospin coupling
Claudius Gros, Gennady Y. Chitov
We present microscopic estimates for the spin-spin and spin-speudospin interactions of the quarter-filled ladder compound NaV2O5, obtained by exactly diagonalizing appropriate clus…