Crystalline phases in chiral ferromagnets: Destabilization of helical order

Details Crystalline phases in chiral ferromagnets: Destabilization of helical order Crystalline phases in chiral ferromagnets: Destabilization of helical order

2007-02-12

arxiv.org/abs/cond-mat/0702287v2

Phys. Rev. B 77, 024415 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 5 figures (published version)

Scientific paper

10.1103/PhysRevB.77.024415

In chiral ferromagnets, weak spin-orbit interactions twist the ferromagnetic order into spirals, leading to helical order. We investigate an extended Ginzburg-Landau theory of such systems where the helical order is destabilized in favor of crystalline phases. These crystalline phases are based on periodic arrangements of double-twist cylinders and are strongly reminiscent of blue phases in liquid crystals. We discuss the relevance of such blue phases for the phase diagram of the chiral ferromagnet MnSi.

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