Finite-temperature phase diagram of the three-dimensional hard-core bosonic t-J model

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.83.235116· OSTI ID:21544783

Nakano, Yuki; Matsui, Tetsuo ^[1]; Ishima, Takumi; Kobayashi, Naohiro; Ichinose, Ikuo ^[2]; Sakakibara, Kazuhiko ^[3]

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1. Department of Physics, Kinki University, Higashi-Osaka 577-8502 (Japan)
2. Department of Applied Physics, Nagoya Institute of Technology, Nagoya 466-8555 (Japan)
3. Department of Physics, Nara National College of Technology, Yamatokohriyama 639-1080 (Japan)

We study the three-dimensional bosonic t-J model, that is, the t-J model of 'bosonic electrons' at finite temperatures. This model describes a system of an isotropic antiferromagnet with doped bosonic holes and is closely related to systems of two-component bosons in an optical lattice. The bosonic 'electron' operator B{sub x{sigma}} at the site x with a two-component spin {sigma}(=1,2) is treated as a hard-core boson operator and represented by a composite of two slave particles: a spinon described by a Schwinger boson (CP{sup 1} boson) z{sub x}{sigma} and a holon described by a hard-core-boson field {phi}{sub x} as B{sub x}{sigma}={phi}{sub x}{sup {dagger}}z{sub x}{sigma}. By means of Monte Carlo simulations of this bosonic t-J model, we study its phase structure and the possible phenomena like appearance of antiferromagnetic long-range order, Bose-Einstein condensation, phase separation, etc. Obtained results show that the bosonic t-J model has a phase diagram that suggests some interesting implications for high-temperature superconducting materials.

• OSTI ID: 21544783
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 83, Issue 23; Other Information: DOI: 10.1103/PhysRevB.83.235116; (c) 2011 American Institute of Physics; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
BOSE-EINSTEIN CONDENSATION
BOSONS
COMPUTERIZED SIMULATION
DOPED MATERIALS
ELECTRONS
HOLES
INTERFERENCE
LASER RADIATION
MONTE CARLO METHOD
PHASE DIAGRAMS
SPIN
STARK EFFECT
SUPERCONDUCTORS
THREE-DIMENSIONAL CALCULATIONS
ANGULAR MOMENTUM
CALCULATION METHODS
DIAGRAMS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FERMIONS
INFORMATION
LEPTONS
MAGNETISM
MATERIALS
PARTICLE PROPERTIES
RADIATIONS
SIMULATION