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- Title
Two Types of Topological Kosterlitz–Thouless Phase Transitions in SmMnO<sub>3+δ</sub> Manganites, Driven by External Magnetic Field.
- Authors
Bukhanko, F. M.
- Abstract
It is shown that, in a SmMnO3+δ sample cooled in a magnetic field H=0 to 4.2 K, the topological order–disorder phase transition of the spin system occurs within the framework of the Kosterlitz–Thouless XY-model decoupling of pairs of the flat 2D vortices. At the same time, when the sample is cooled in the field H≠0, the transition of the system of spins to a disordered state with increasing temperature occurs in the form of dissociation of pairs of bounded Z2 vortices at the same critical temperature TKT=12 K, which is accompanied by a giant jump in the supermagnetization of the sample. The excitation and decay of low-energy bosons in a 1D metallic Luttinger liquid at temperatures of 0.5 K and 4.2 K during sample remagnetization in the ZFC and FC measurement modes is also studied.
- Subjects
MAGNETIC fields; PHASE transitions; LUTTINGER liquids; CRITICAL temperature; ORDER-disorder transitions; SPHEROMAKS; MANGANITE
- Publication
Nanosistemi, Nanomateriali, Nanotehnologii, 2023, Vol 21, Issue 2, p233
- ISSN
1816-5230
- Publication type
Article
- DOI
10.15407/nnn.21.02.233