Quantum phase transitions in spiral magnets without inversion center

Sergei V. Demishev; Vladimir Vital’evich Glushkov; Sergei Valentinovich Grigoriev; Marat Irikovich Gil’manov; Inna Igorevna Lobanova; Aleksandr Nikolaevich Samarin; Aleksei Valer’evich Semeno; Nikolai Efimovich Sluchanko

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Conferences and symposia. 70th anniversary of the E.K. Zavoisky physical-technical institute, Kazan scientific center of the Russian academy of sciences

Quantum phase transitions in spiral magnets without inversion center

S.V. Demishev^a, b, V.V. Glushkov^a, c, S.V. Grigoriev^d, M.I. Gil’manov^c, I.I. Lobanova^a, c, A.N. Samarin^c, A.V. Semeno^a, N.E. Sluchanko^a, c
^aProkhorov General Physics Institute of the Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russian Federation
^bHSE University, ul. Myasnitskaya 20, Moscow, 101000, Russian Federation
^cMoscow Institute of Physics and Technology (National Research University), Institutskii per. 9, Dolgoprudny, Moscow Region, 141701, Russian Federation
^dThe 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 Mn_1-xFe_xSi solid solutions exhibits two quantum critical points: x* ~ 0.11, which corresponds to the disappearance of long-range spiral magnetic order, and x_c ~ 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.

Keywords: spiral magnets, Mn_1-xFe_xSi, 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/
Web of Science

000386349400004
Scopus

2-s2.0-84987660654
ADS NASA

2016PhyU...59..559D
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, accepted: 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