Successive Majorana topological transitions driven by a magnetic field in the Kitaev model

We study quantum phase transitions in the honeycomb Kitaev model under a magnetic field, focusing on the topological nature of Majorana fermion excitations. We find a gapless phase between the low-field gapless quantum spin liquid and the high-field gapped forced-ferromagnetic state for the antiferr...

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Veröffentlicht in:	Physical review. B 2018-08, Vol.98 (6), p.060416, Article 060416
Hauptverfasser:	Nasu, Joji, Kato, Yasuyuki, Kamiya, Yoshitomo, Motome, Yukitoshi
Format:	Artikel
Sprache:	eng
Schlagworte:	Antiferromagnetism Cones Ferromagnetism Hall effect Honeycomb construction Magnetic fields Magnetism Mean field theory Phase transitions Spin liquid Topology
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