Binding of holes in the Hubbard model

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.41.811· OSTI ID:7161018

Dagotto, E ^[1]; Moreo, A; Sugar, R L ^[2]; Toussaint, D ^[3]

---

1. Institute for Theoretical Physics, University of California, Santa Barbara, California 93106 (USA)
2. Department of Physics, University of California, Santa Barbara, California 93106 (USA)
3. Department of Physics, University of Arizona, Tucson, Arizona 85721 (USA)

We present a new numerical method for the study of binding energies of particles in fermionic systems. Working with an {ital imaginary} chemical potential we can obtain results in the {ital canonical} ensemble by simple modifications of standard numerical techniques. We applied the technique to the two-dimensional Hubbard model observing binding of holes at half-filling on lattices of 4{times}4 sites. For {ital U}/{ital t}=4 we estimate that the binding energy is {Delta}={minus}0.10{plus minus}0.02.

• DOE Contract Number: FG03-85ER45197
• OSTI ID: 7161018
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 41:1; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

656002* -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BAND THEORY
BINDING ENERGY
COMPUTERIZED SIMULATION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY
FERMI GAS
FLUIDS
GASES
HAMILTONIANS
HOLES
MATHEMATICAL OPERATORS
PHYSICAL PROPERTIES
QUANTUM OPERATORS
SIMULATION
SOLIDS
SUPERCONDUCTIVITY
TWO-DIMENSIONAL CALCULATIONS