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pdf, 9 MiB - Infoscience - EPFL

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Chapter 3<br />

t-J Model on the triangular<br />

lattice<br />

3.1 Outline<br />

We investigate the phase diagram of the t − J Model on a triangular lattice<br />

using a Variational Monte Carlo approach. We use an extended set of Gutzwiller<br />

projected fermionic trial wavefunctions allowing for simultaneous magnetic and<br />

superconducting order parameters. We obtain energies at zero doping for the<br />

spin-1/2 Heisenberg model in very good agreement with the best estimates. Upon<br />

electron doping (with a hopping integral t

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