Response to "Response to the Comment on 'Performance of a Spin Based   Insulated Gate Field Effect Transistor' "
  We show that the arguments in the posting cond-mat/0607432 by Flatte and Hall are flawed and untenable. Their spin based transistor cannot work as claimed because of fundamental scientific barriers, which cannot be overcome now, or ever. Their device is not likely to work as a transistor at room temperature, let alone outperform the traditional MOSFET, as claimed. 
S. Bandyopadhyay and M. Cahay