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›› 2000, Vol. 17 ›› Issue (2): 22-27.

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SUPERCONDUCTING LONG-RANGE ORDER IN THE t-J MODEL

Su Gang   

  1. Department of Physics, Graduate School, Chinese Academy of Sciences, Beijing 100039
  • Received:2000-10-23 Online:2000-03-15
  • Supported by:

    ThisworkissupportedinpartbytheNSFC (19947002) ;theClimbingPlanProjectofChina;theStateKeyProject forFundamentalResearch

Abstract:

It is show n that the one- and the tw o-dimensional t-J model with narrow bands (including nex t nearest-neig hbor hopping, etc.)does no t exhibit s-wave nearest-neighbor, an ex tended η, the general off-site Q and the dx2 -y2-w ave pairing long-range orders at any nonzero temperature.These pairing long-range orders w ill also be excluded at zero temperature if an ex cited energy gap opens in the charge excitation spect rum of the system.Our result s hold t rue for arbit rary values of J and for any electron f illings.

Key words: d-wave, superconducting, long-range order, t-J model

CLC Number: