Article
Quantum Phase Transition of Itinerant Helimagnets
Physical Review B (Condensed Matter)
Abstract
We investigate the quantum phase transition of itinerant electrons from a paramagnet to a state which displays long-period helical structures due to a Dzyaloshinskii instability of the ferromagnetic state. In particular, we study how the self-generated effective long-range interaction recently identified in itinerant quantum ferromagnets is cut off by the helical ordering. We find that for a sufficiently strong Dzyaloshinskii instability the helimagnetic quantum phase transition is of second order with mean-field exponents. In contrast, for a weak Dzyaloshinskii instability the transition is analogous to that in itinerant quantum ferromagnets, i.e., it is of first order, as has been observed in MnSi.
Department(s)
Physics
Keywords and Phrases
- electron,
- magnet,
- magnetic field,
- mathematical analysis,
- phase transition,
- quantum mechanics
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2001 American Physical Society (APS), All rights reserved.
Publication Date
8-1-2001
Publication Date
01 Aug 2001
Disciplines
Citation Information
Thomas Vojta and Rastko Sknepnek. "Quantum Phase Transition of Itinerant Helimagnets" Physical Review B (Condensed Matter) Vol. 64 Iss. 5 (2001) p. 524041 - 524044 ISSN: 0163-1829 Available at: http://works.bepress.com/thomas-vojta/117/