摘要
Taking into account correlations in a layered two-dimensional（2D）Fermi liquid,aCoulomb-type interaction induces pairing if particle-hole excitations are taken into account.The quasi-particle pairing force is analogous to the resonating valence bond（RVB）of elec-trons in a hydrogen or positronium molecule-like structure.It is turned out that scatteringdiagrams from this model allow to evaluate the vertex function Γ.T<sub>c</sub> is hence calculated byusing the pole condition Γ<sup>-1</sup>=0.It has been found out that T<sub>c</sub> can reach quite high values andgives rise to the bell shape,and is related to the particle density,interlayer distance,dielec-tric constant and band mass.PACS numbers:74.65.+n,71.45.Gm.,74.70.Jm.,71.45.Lr.
Taking into account correlations in a layered two-dimensional(2D)Fermi liquid,a Coulomb-type interaction induces pairing if particle-hole excitations are taken into account. The quasi-particle pairing force is analogous to the resonating valence bond(RVB)of elec- trons in a hydrogen or positronium molecule-like structure.It is turned out that scattering diagrams from this model allow to evaluate the vertex function Γ.T_c is hence calculated by using the pole condition Γ^(-1)=0.It has been found out that T_c can reach quite high values and gives rise to the bell shape,and is related to the particle density,interlayer distance,dielec- tric constant and band mass. PACS numbers:74.65.+n,71.45.Gm.,74.70.Jm.,71.45.Lr.
基金
Supported by Doe through Science Engineering Alliance under the grant No.DE-FG05-94ER25229
The numerical calculations were performed on the CRY supercomputer provided by NCSA at UIUC.
