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- Title
Breakdown of a Magnetization Plateau in Ferrimagnetic Mixed Spin-(1/2,S) Heisenberg Chains due to a Quantum Phase Transition towards the Luttinger Spin Liquid.
- Authors
STREČKA, J.
- Abstract
Magnetization curves of the ferrimagnetic mixed spin-(1/2,S) Heisenberg chains are calculated with the help of density-matrix renormalization group method for several quantum spin numbers S=1, 3/2, 2 and 5/2. It is shown that the ferrimagnetic mixed spin-(1/2,S) Heisenberg chains exhibit irrespective of the spin value S exactly one intermediate magnetization plateau, which can be identified with the gapped Lieb-Mattis ferrimagnetic ground state. The magnetization plateau due to the Lieb-Mattis ferrimagnetism breaks down at a quantum phase transition towards the Luttinger spin liquid, which is characterized by a continuous change of the magnetization with the magnetic field until another quantum critical point is reached at the saturation field.
- Subjects
MAGNETIZATION; FERRIMAGNETIC materials; SPIN-lattice relaxation; HEISENBERG model; QUANTUM phase transitions; LUTTINGER liquids
- Publication
Acta Physica Polonica: A, 2017, Vol 131, Issue 4, p624
- ISSN
0587-4246
- Publication type
Article
- DOI
10.12693/APhysPolA.131.624