Phase diagrams of spin ladders with ferromagnetic legs
نویسندگان
چکیده
منابع مشابه
Phase diagrams and universality classes of random antiferromagnetic spin ladders
The random antiferromagnetic two-leg and zigzag spin-1 /2 ladders are investigated using the real space renormalization group scheme and their complete phase diagrams are determined. We demonstrate that the first system belongs to the same universality class of the dimerized random spin-1 /2 chain. The zigzag ladder, on the other hand, is in a random singlet phase at weak frustration and disord...
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A proof is presented for the absence of gap for spin 1/2 ladders with an odd number of legs, in the infinite leg length limit. This result is relevant to the current discussion of coupled one–dimensional spin systems, a physical realization of which are vanadyl pyrophosphate, (VO)2P2O7, and stoichiometric Srn−1 Cun+1 O2n (with n = 3, 5, 7, 9, . . .). The magnetic properties of low dimensional s...
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Photoemission spectra for the isotropic two-leg t-J ladder are calculated at various hole-doping levels using Exact Diagonalization techniques. Lowenergy sharp features caused by short-range antiferromagnetic correlations are observed at finite doping levels close to half-filling, above the naive Fermi momentum. These features should be observable in angle-resolved photoemission experiments. In...
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X iv :q ua nt -p h/ 06 12 20 7v 1 2 5 D ec 2 00 6 Quantum Phase Transitions and Matrix Product States in Spin Ladders M. Asoudeh,∗ V. Karimipour†,‡ and A. Sadrolashrafi§ Department of Physics, Sharif University of Technology, P.O. Box 11365-9161, Tehran, Iran (Dated: December 28, 2006) Abstract We investigate quantum phase transitions in ladders of spin 1/2 particles by engineering suitable mat...
متن کاملSpin ladder with anisotropic ferromagnetic legs in a transverse magnetic field.
We have studied the ground-state phase diagram of a two-leg spin ladder with anisotropic ferromagnetic leg couplings under the influence of a symmetry-breaking transverse magnetic field by the exact diagonalization technique. In the case of antiferromagnetic coupling between legs we identified two phase transitions in the plane of magnetic field versus interchain coupling strength. The first co...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2003
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.67.064419