Send to

Choose Destination
Phys Rev Lett. 2004 Jul 16;93(3):036405. Epub 2004 Jul 16.

Quantum phase transitions of magnetic rotons.

Author information

Department of Physics and Astronomy and Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA.


Because of weak spin-orbit coupling and broken inversion symmetry the paramagnons of an itinerant, almost ferromagnetic system become magnetic rotons. Using self-consistent Hartree and renormalization group calculations, we study weak fluctuation-driven first-order quantum phase transitions, a quantum tricritical point controlled by anisotropy, and non-Fermi liquid behavior associated with the large phase volume of magnetic rotons. We propose that magnetic rotons are essential for the description of the anomalous high-pressure behavior of the itinerant helical ferromagnet MnSi.

Supplemental Content

Full text links

Icon for American Physical Society
Loading ...
Support Center