Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-11-16
Phys. Rev. Lett. 108, 067003 (2012)
Physics
Condensed Matter
Strongly Correlated Electrons
4.2 pages, 3 figures, references updated, version accepted for publication in PRL
Scientific paper
The vicinity of quantum phase transitions has proven fertile ground in the search for new quantum phases. We propose a physically motivated and unifying description of phase reconstruction near metallic quantum-critical points using the idea of quantum order-by-disorder. Certain deformations of the Fermi surface associated with the onset of competing order enhance the phase space available for low-energy, particle-hole fluctuations and self-consistently lower the free energy. Applying the notion of quantum order-by-disorder to the itinerant helimagnet MnSi, we show that near to the quantum critical point, fluctuations lead to an increase of the spiral ordering wave vector and a reorientation away from the lattice favored directions. The magnetic ordering pattern in this fluctuation-driven phase is found to be in excellent agreement with the neutron scattering data in the partially ordered phase of MnSi.
Green Andrew G.
Karahasanovic Una
Krüger Frank
No associations
LandOfFree
Quantum order-by-disorder near criticality and the secret of partial order in MnSi does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quantum order-by-disorder near criticality and the secret of partial order in MnSi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum order-by-disorder near criticality and the secret of partial order in MnSi will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-348847