Phys. Rev. Lett. 78, 4825–4828 (1997)Collective Excitations, NMR, and Phase Transitions in Skyrme CrystalsReceived 21 February 1997; published in the issue dated 23 June 1997 At Landau level filling factors near ν = 1, quantum Hall ferromagnets form a Skyrme crystal state with quasi-long-range translational and noncollinear magnetic order. We develop an effective low energy theory which explains the presence of magnetic excitations in these systems at energies below the Larmor gap ( Δ) and that predicts a dramatic enhancement of the nuclear spin relaxation rate by a factor of 103. The effective theory predicts a rich set of quantum and classical phase transitions. Based in part on accurate time-dependent Hartree-Fock calculations of the ordered state collective excitation spectrum, we discuss aspects of the T-ν-Δ Skyrme crystal phase diagram. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.78.4825
DOI:
10.1103/PhysRevLett.78.4825
PACS:
73.40.Hm, 64.60.Cn, 75.10.-b
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.