Hard-core slave-boson description of generalized flux phases

Journal Article · Tue Jan 01 04:00:00 EST 1991 · International Journal of Modern Physics B; (United States)

DOI:https://doi.org/10.1142/S0217979291000080· OSTI ID:6153203

Nori, F ^[1]; Zimanyi, G T ^[2]; Abraham, E ^[3]

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1. Michigan Univ., Ann Arbor, MI (United States). Dept. of Physics
2. Rutgers--the State Univ., New Brunswick, NJ (United States). Dept. of Physics
3. California Univ., Davis, CA (United States). Dept. of Physics

Through a hard-core slave-boson mean-field approach to the t-J model, which describes the dynamics of holes moving in a quantum antiferromagnet, the authors investigate its generalized flux phases. In this paper, the authors study the motion of an electron gas for arbitrary fillings and fields and establish the linear proportionality between the filling factor and the optimal flux with high accuracy. Using this result, we show that if the hard-core nature of the hole bosons is taken into account, then the slave-boson mean-field approximation for the t-J Hamiltonian allows for a solution where both the spinons and the holons experience as average flux of one flux quantum per particle. This enables them to achieve the lowest possible energy within the manifold of spatially-uniform flux states. In the case of the continuum model, this is possible only for certain fractional fillings and we suggest that the system may react to this frustration effect by phase separation.

• OSTI ID: 6153203
• Journal Information: International Journal of Modern Physics B; (United States), Journal Name: International Journal of Modern Physics B; (United States) Vol. 5:1-2; ISSN 0217-9792; ISSN IJPBE
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
BOSONS
DIFFERENTIAL EQUATIONS
DYNAMICS
ELECTRON GAS
EQUATIONS
EQUATIONS OF MOTION
FLUIDS
GASES
HAMILTONIANS
HOLES
MAGNETIC FLUX
MAGNETISM
MATHEMATICAL OPERATORS
MEAN-FIELD THEORY
MECHANICS
PARTIAL DIFFERENTIAL EQUATIONS
QUANTUM MECHANICS
QUANTUM OPERATORS
QUASI PARTICLES