Existence of fermion zero modes and deconfinement of spinons in quantum antiferromagnetism resulting from algebraic spin liquid

Journal Article · Thu Dec 01 04:00:00 EST 2005 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.72.2· OSTI ID:20787746

Kim, Ki-Seok ^[1]

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1. School of Physics, Korea Institute for Advanced Study, Seoul 130-012 (Korea, Republic of)

We investigate the quantum antiferromagnetism arising from algebraic spin liquid via spontaneous chiral symmetry breaking. We claim that in the antiferromagnet massive Dirac spinons can appear to make a broad continuum spectrum at high energies in inelastic neutron scattering. The mechanism of spinon deconfinement results from the existence of fermion zero modes in single monopole potentials. Neel vectors can make a hedgehog configuration around a magnetic monopole of compact U(1) gauge fields. Remarkably, in the monopole composite potential the Dirac fermion is shown to have a zero mode. The emergence of the fermion zero mode forbids the condensation of monopoles, resulting in deconfinement of Dirac spinons in the quantum antiferromagnet.

• OSTI ID: 20787746
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 21 Vol. 72; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
CHIRAL SYMMETRY
FERMIONS
INELASTIC SCATTERING
LIQUIDS
MAGNONS
MONOPOLES
NEUTRON DIFFRACTION
POTENTIALS
SPIN
SYMMETRY BREAKING