  Signal of lighter top squark has been looked for using Tevatron data in the
di-electron plus di-jet channel. We find that the mass of the lighter top
squark when it decays dominantly in the electron plus jet channel, can be ruled
out up to 220 GeV at 95% C.L. using di-electron data. In the framework of
R-parity breaking SUSY model we exclude relevant R-parity violating couplings
for a range of top squark masses and other SUSY parameters. The bounds on
R-parity violating couplings are very stringent for the parameter space where
lighter top squark turns out to be the next to lightest supersymmetric
particle.
