منابع مشابه
Doped antiferromagnets in high dimension
The ground-state properties of the t-J model on a d-dimensional hypercubic lattice are examined in the limit of large d . It is found that the undoped system is an ordered antiferromagnet, and that the doped system phase separates into a hole-free antiferromagnetic phase and a hole-rich phase. The latter is electron free if J.4t and is weakly metallic ~and typically superconducting! if J,4t . T...
متن کاملDiamagnetic Properties of Doped Antiferromagnets
Finite-temperature diamagnetic properties of doped antiferromagnets as modeled by the two-dimensional t-J model were investigated by numerical studies of small model systems. Two numerical methods were used: the worldline quantum Monte Carlo method with a loop cluster algorithm (QMC) and the finite-temperature Lanczos method (FTLM), yielding consistent results. The diamagnetic susceptibility in...
متن کاملDynamics of Stripes in Doped Antiferromagnets
We study the dynamics of the striped phase, which has previously been suggested to be the ground state of a doped antiferromagnet. Starting from the t − J model, we derive the classical equation governing the motion of the charged wall by using a ficticious spin model as an intermediate step. A wave-like equation of motion is obtained and the wall elasticity and mass density constants are deriv...
متن کاملAsymmetric Tunneling Conductance in Doped Antiferromagnets
We calculate the tunneling conductance in the framework of the spin polaron model, which is an effective model for the t−J model, in the limit where at least short-range antiferromagnetic correlations exist. We show that both in the normal state and in the superconducting state the asymmetry of tunneling conductance is present. This fact is the implication of the particle–hole asymmetry of the ...
متن کاملModulated spiral phases in doped quantum antiferromagnets
2014 We study the spiral phase discovered by Shraiman and Siggia, in the regime of coupling constant where the effective spin wave stiffness is negative. We show that this instability does not signal a phase separation but rather the formation of domain walls in the (1,1) or (1,1) directions on a square lattice, where holes get trapped. We discuss briefly the interplay between dipolar and Coulo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 1998
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.57.14704