Influence of next-nearest-neighbor electron hopping on the magnetic properties of the 2D Hubbard model
- Florida State Univ., Tallahassee, FL (United States)
Comparing experimental data for high temperature cuprate superconductors with numerical results for electronic models, it is becoming apparent that a diagonal hopping has to be included to obtain quantitative agreement. According to recent estimations the value of the diagonal hopping, t{prime}, appears to be material dependent. However, the values for t{prime} discussed in the literature were obtained comparing theoretical results in the non-interacting and weak-coupling limit with experimental photoemission data. The goal of this paper is to study how t{prime} gets renormalized as the interaction between electrons, U, increases. For this purpose, the effect of adding a bare diagonal hopping t{prime} to the fully interacting two dimensional Hubbard model Hamiltonian is investigated using numerical techniques. Positive and negative values of t{prime} are analyzed. Magnetic correlations and incommensurability are studied for values of U/t ranging from 0 to 6, and as a function of the electronic density.
- OSTI ID:
- 425985
- Report Number(s):
- CONF-9505186-; CNN: Grant ONR N00014-93-0495; Grant ONR N00014-94-1-1031; TRN: 96:005768-0027
- Resource Relation:
- Conference: 2. physical phenomena at high magnetic fields conference, Tallahassee, FL (United States), 6-9 May 1995; Other Information: PBD: 1996; Related Information: Is Part Of Proceedings of the physical phenomena at high magnetic fields - II; Fisk, Z.; Gor`kov, L.; Meltzer, D.; Schrieffer, R. [eds.]; PB: 807 p.
- Country of Publication:
- United States
- Language:
- English
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