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.
Recommended Citation
T. Vojta and R. Sknepnek, "Quantum Phase Transition of Itinerant Helimagnets," Physical Review B (Condensed Matter), vol. 64, no. 5, pp. 524041 - 524044, American Physical Society (APS), Aug 2001.
The definitive version is available at https://doi.org/10.1103/PhysRevB.64.052404
Department(s)
Physics
Keywords and Phrases
electron; magnet; magnetic field; mathematical analysis; phase transition; quantum mechanics
International Standard Serial Number (ISSN)
0163-1829
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
01 Aug 2001
