منابع مشابه
Spin-carrying Spin Polarons in the T-j Model *
The report discusses the spinless-fermion (holon) representation of the t-J model and describes a new analytical representation in which fermion operators are directly related to the physical electron operators and have spin. A simple, leading-order, treatment of the magnetic dynamics allows to take into account the spin-liquid aspect of the ground state. The obtained effective model, in compar...
متن کاملExact spin dynamics of the 1/r supersymmetric t-J model in a magnetic field
Abstract. The dynamical spin structure factor S(Q, ω) in the small momentum region is derived analytically for the one-dimensional supersymmetric t-J model with 1/r interaction. Strong spin-charge separation is found in the spin dynamics. The structure factor S(Q,ω) with a given spin polarization does not depend on the electron density in the small momentum region. In the thermodynamic limit, o...
متن کاملPhase separation in the large-spin t-J model.
We investigate the phase diagram of the two dimensional t-J model using a recently developed technique that allows to solve the mean-field model hamiltonian with a variational calculation. The accuracy of our estimate is controlled by means of a small parameter 1/q, analogous to the inverse spin magnitude 1/s employed in studying quantum spin systems. The mathematical aspects of the method and ...
متن کاملNature of spin-charge separation in the t-J model
Quasiparticle properties are explored in an effective theory of the t-J model which includes two important components: spin-charge separation and unrenormalizable phase shift. We show that the phase shift effect indeed causes the system to be a non-Fermi liquid as conjectured by Anderson on general grounds. But this phase shift also drastically changes a conventional perception of quasiparticle...
متن کاملSpin bags in the doped t-J model.
We present a nonperturbative method for deriving a quasiparticle description of the low-energy excitations in the t−J model for strongly correlated electrons. Using the exact diagonalization technique we evaluated exactly the spectral functions of composite operators, which describe an electron or hole dressed by antiferromagnetic spin fluctuations as expected in the string or spin bag picture....
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ژورنال
عنوان ژورنال: Physics Letters A
سال: 1998
ISSN: 0375-9601
DOI: 10.1016/s0375-9601(98)00195-9