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Chiral Hall effect during the first-order phase transition in ferromagnetic lanthanum manganites
Povzner A.A.
1, Filanovich A.N.
1, Lopatko E.I.
1, Zaitceva N.A.
1
1Ural Federal University after the first President of Russia B.N. Yeltsin, Yekaterinburg, Russia
Email: a.a.povzner@urfu.ru, a.n.filanovich@urfu.ru, e.i.lopatko@urfu.ru, n.a.zaitceva@urfu.ru
Based on the results of ab initio electronic structure modeling, the phase separation during magnetic phase transitions of the first kind in ferromagnetic (La1-xCaxMnO3) lanthanum manganite is studied. It has been found that the stratification occurs due to a negative mode-mode interaction in the spin system, which is a necessary condition for the first-order phase transition in the Ginzburg-Landau theory. It is shown that due to the peculiarities of the electronic structure during phase separation, metal droplets possess scalar spin chirality. This leads to sd-scattering by spin inhomogeneities, which causes the Anderson metal-semiconductor transition near the Curie temperature and the appearance of the chiral Hall effect. Keywords: first-order phase transition, spin density fluctuations, phase separation, Andersen localization, spin chirality, Hall effect.
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