On the Phase Diagram of Spin-Polarized Attractive Hubbard Model: Weak Coupling Limit

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

On the Phase Diagram of Spin-Polarized Attractive Hubbard Model: Weak Coupling Limit

The superfluid properties of the attractive Hubbard model in a Zeeman magnetic field, and in the weak coupling regime have been investigated. The temperature and magnetic field dependencies of the order parameter have been analyzed. Furthermore, the temperature vs. magnetic field and temperature vs. spin polarization phase diagrams for the 2D and 3D lattices have been obtained. For some paramet...

متن کامل

Phase diagram of the extended Hubbard model at weak coupling.

The Hubbard model including nearest neighbor interaction is studied at T50 on a d-dimensional hypercubic lattice (d@1) close to half filling. For the model in d5` we derive the exact result that the ground state at weak coupling is phase separated. Results for lower dimensions are then derived in a 1/d expansion. To obtain these results we first consider possible second order transitions. One t...

متن کامل

Weak-coupling phase diagram of the two-chain Hubbard model.

We present a general method for determining the phase diagram of systems of a finite number of onedimensional Hubbard-like systems coupled by single-particle hopping with weak interactions. The technique is illustrated by detailed calculations for the two-chain Hubbard model, providing controlled results for arbitrary doping and interchain hopping. Of nine possible states which could occur in s...

متن کامل

Some Properties of the Spin-Polarized Attractive Hubbard Model

The influence of a Zeeman magnetic field on the superconducting characteristics of the attractive Hubbard model has been investigated. The ground state and temperature phase diagrams have been obtained for a fixed number of particles. Two critical magnetic fields have been found for the first order phase transition from the superconducting (SC) to the normal (NO) state for n 6= 1. For some rang...

متن کامل

Weak-coupling phase diagram of the extended Hubbard model with correlated-hopping interaction

A one-dimensional model of interacting electrons with on-site U, nearest-neighbor V, and correlatedhopping interaction T* is studied at half filling using the continuum-limit field theory approach. The groundstate phase diagram is obtained for a wide range of coupling constants. In addition to the insulating spinand charge-density wave phases for large U and V, respectively, we identify bond-lo...

متن کامل

ذخیره 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: Acta Physica Polonica A

سال: 2008

ISSN: 0587-4246,1898-794X

DOI: 10.12693/aphyspola.114.43