ISSN:
1573-7357
Keywords:
71.10
;
74−70V
;
74−20
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We can construct unbiased systematic improvements of standard Variational Monte Carlo calculations by the use of wavefunctions modified by short range operators. Using the energy and spectral width of the original and improved wavefunctions we can judge the quality of the trial wavefunctions. For the t-J model we find the regions of phase separation and d-wave superconductivity with varying J/t and hole density S and extend the T=0 phase diagram into the physically interesting region of δ ∼ 0.1 – 0.2and J/t ∼ 0.4.Above the critical ratio of J/t¦ c we find clear evidence of dx2-y2-pairing and above a higher value J/t¦s phase separation. At δ=0.16we obtain values J/t¦ c=0.4and J/t¦ s=0.7. Cluster sizes up to 50 sites are used.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00752340
