𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The Hall constant of correlated electrons: Cluster calculation for Hubbard Model

✍ Scribed by P.N Mahesh; B.S Shastry

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
321 KB
Volume
223-224
Category
Article
ISSN
0921-4526

No coin nor oath required. For personal study only.

✦ Synopsis

We calculate the Hall constant RH(e~, T) for the high T~ materials Laz_xSrxCuO 4 and YBa2Cu3Ov-x using the 2D Hubbard model, on a cluster of dimension (2 Γ— 3). Close to half filling, at low temperatures and high frequency, we find that Rn(~/3) is electronlike in the weak correlation regime and in the strong correlation regime it is holelike with roughly lIT + const form. At high frequencies, for La2 -xSr~CuO4 we obtain a change in the sign of Ru(~o) at x ~ 0.3, which is in good agreement with the experimental data.

πŸ“œ SIMILAR VOLUMES

Inapplicability of the Hubbard model for
Inapplicability of the Hubbard model for the description of real strongly correlated electrons
✍ J.E. Hirsch πŸ“‚ Article πŸ“… 1994 πŸ› Elsevier Science 🌐 English βš– 563 KB

The single band Hubbard model assumes that two electrons in an atom will doubly-occupy the same atomic orbital that is singly occupied when a single electron is at the atom. This assumption is incorrect, due to the fact that the spacing of atomic energy levels is always smaller than the intra-atomic

Numerical calculation of correlation fun
Numerical calculation of correlation functions by boundary condition averaging: test on the one-dimensional Hubbard model
✍ Mau Chung Nguyen; P. Santini; Paul ErdΓΆs πŸ“‚ Article πŸ“… 1995 πŸ› Elsevier Science 🌐 English βš– 349 KB

We diagonalize exactly the Hamiltonian of the one-dimensional half filled Hubbard model on small clusters of sites with generalized boundary conditions (BCs), and we calculate various correlation functions. We choose the ratio of the onsite repulsion to the hopping matrix element U/t = 1, i.e. an in