Broken translational symmetry in an emergent paramagnetic phase of graphene
Author(s)
Chern, Gia-Wei; Fernandes, Rafael M.; Nandkishore, Rahul Mahajan; Chubukov, Andrey V.
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We show that the spin-density wave state on the partially filled honeycomb and triangular lattices is preempted by a paramagnetic phase that breaks an emergent Z[subscript 4] symmetry of the system associated with the four inequivalent arrangements of spins in the quadrupled unit cell. Unlike other emergent paramagnetic phases in itinerant and localized-spin systems, this state preserves the C[subscript 6] rotational symmetry of the lattice, but breaks its translational symmetry, giving rise to a superlattice structure that can be detected by scanning tunneling microscopy. This emergent phase also has distinctive signatures in the magnetic spectrum that can be probed experimentally.
Date issued
2012-09Department
Massachusetts Institute of Technology. Department of PhysicsJournal
Physical Review B
Publisher
American Physical Society
Citation
Chern, Gia-Wei et al. “Broken Translational Symmetry in an Emergent Paramagnetic Phase of Graphene.” Physical Review B 86.11 (2012). ©2012 American Physical Society
Version: Final published version
ISSN
1098-0121
1550-235X