Proceedings of the 2nd International Symposium on Science at J-Parc — Unlocking the Mysteries of Life, Matter and the Universe 2015
DOI: 10.7566/jpscp.8.034005
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Lifshitz Transition Induced by Magnetic Field in Frustrated Two-Leg Spin-Ladder Systems

Abstract: The magnetization curve in a frustrated two-leg spin-ladder system is theoretically studied using both analytical and numerical methods. This spin system is mapped onto a hard-core boson system, which is composed of bond-operators describing the triplon excitation. By the analytical method using the mean-field theory on the bond-operators, we show that cusp singularities emerge in the magnetization curve as a function of a magnetic field due to the strong frustration. This originates from a change of number of… Show more

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“…Despite previous studies, [1][2][3][4][5] the effects of external magnetic fields on materials in which antiferromagnetic (Heisenberg) exchange interactions between spin-1 /2 moments form quasi one-dimensional frustrated spin ladders (Fig. 1) are not fully understood.…”
mentioning
confidence: 99%
“…Despite previous studies, [1][2][3][4][5] the effects of external magnetic fields on materials in which antiferromagnetic (Heisenberg) exchange interactions between spin-1 /2 moments form quasi one-dimensional frustrated spin ladders (Fig. 1) are not fully understood.…”
mentioning
confidence: 99%