Charge 2e Skyrmions in Bilayer Graphene

Journal Article · Fri Aug 14 00:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.076802· OSTI ID:21370668

Abanin, D A ^[1]; Parameswaran, S A; Sondhi, S L ^[2]

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1. Princeton Center for Theoretical Science, Princeton University, Princeton, New Jersey 08544 (United States)
2. Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)

Quantum Hall states that result from interaction induced lifting of the eightfold degeneracy of the zeroth Landau level in bilayer graphene are considered. We show that at even filling factors electric charge is injected into the system in the form of charge 2e Skyrmions. This is a rare example of binding of charges in a system with purely repulsive interactions. We calculate the Skyrmion energy and size as a function of the effective Zeeman interaction and discuss the signatures of the charge 2e Skyrmions in the scanning probe experiments.

• OSTI ID: 21370668
• Journal Information: Physical Review Letters, Vol. 103, Issue 7; Other Information: DOI: 10.1103/PhysRevLett.103.076802; (c) 2009 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRIC CHARGES
FUNCTIONS
INTERACTIONS
LAYERS
SKYRME POTENTIAL
SOLITONS
ZEEMAN EFFECT
NUCLEON-NUCLEON POTENTIAL
POTENTIALS
QUASI PARTICLES