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Quantum phase transitions in spiral magnets without inversion center

 a, b,  a, c,  d,  c,  a, c,  c,  a,  a, c
a Prokhorov General Physics Institute of the Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119942, Russian Federation
b National Research University Higher School of Economics, ul. Myasnitskaya 20, Moscow, 101000, Russian Federation
c Moscow Institute of Physics and Technology (State University), Institutskii per. 9, Dolgoprudnyi, Moscow Region, 141700, Russian Federation
d The National Research Center "Kurchatov Institute", Konstantinov Petersburg Nuclear Physics Institute, Orlova Roshcha, Gatchina, Leningradskaya Region, 188300, Russian Federation

It is shown that the T − x magnetic phase diagram of Mn1-xFexSi solid solutions exhibits two quantum critical points: x* ~ 0.11, which corresponds to the disappearance of long-range spiral magnetic order, and xc ~ 0.24, which marks the suppression of the phase with short-range magnetic order It is established that the macroscopic reason for observed complicated quantum critical behavior is the evolution of the Fermi-surface driven by an increase of the iron concentration.

Text can be downloaded in Russian. English translation is available here.
Keywords: spiral magnets, Mn1-xFexSi, quantum criticality, magnetic phase diagram, electron paramagnetic resonance, Hall effect, strongly correlated electron systems
PACS: 75.10.Kt, 75.30.Kz, 75.47.−m, 75.50.Bb, 76.30.Fc (all)
DOI: 10.3367/UFNe.2016.02.037767
URL: https://ufn.ru/en/articles/2016/6/d/
Citation: Demishev S V, Glushkov V V, Grigoriev S V, Gil’manov M I, Lobanova I I, Samarin A N, Semeno A V, Sluchanko N E "Quantum phase transitions in spiral magnets without inversion center" Phys. Usp. 59 559–563 (2016)
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Received: 3rd, March 2016, 4th, February 2016

Оригинал: Демишев С В, Глушков В В, Григорьев С В, Гильманов М И, Лобанова И И, Самарин А Н, Семено А В, Случанко Н Е «Квантовые фазовые переходы в спиральных магнетиках без центра инверсии» УФН 186 628–632 (2016); DOI: 10.3367/UFNr.2016.02.037767

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