COOPER-PAIR TUNNELING INTO A QUANTUM HALL FLUID

Transport through a tunnel junction connecting a superconductor to a s pin-aligned quantum Hall fluid at filling nu is studied theoretically. The dominant transport channel at low temperatures is the tunneling o f Cooper pairs into edge states of the quantum Hall fluid. This proces s, which is greatly suppressed at low energies due to both Coulomb and Pauli exclusion effects, leads to a tunneling conductance which vanis hes with temperature as T4/nu-2, for nu-1 an odd integer. For integer fillings with nu > 1 the ''Pauli blockade'' is circumvented and a nonv anishing conductance is predicted.