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.
DepartmentMassachusetts Institute of Technology. Department of Physics
Physical Review B
American Physical Society
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
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