COOPER-PAIR TUNNELING INTO A QUANTUM HALL FLUID

Article

关键词: TRANSPORT-PROPERTIES;    ELECTRON-GAS;    STATES;    CONDUCTANCE;    FLUCTUATIONS;    EXCITATIONS;    CHARGE;    REGIME;    ORDER;   

DOI  :  10.1103/PhysRevB.49.14550

来源: SCIE

【 摘 要 】

Transport through a tunnel junction connecting a superconductor to a spin-aligned quantum Hall fluid at filling nu is studied theoretically. The dominant transport channel at low temperatures is the tunneling of Cooper pairs into edge states of the quantum Hall fluid. This process, which is greatly suppressed at low energies due to both Coulomb and Pauli exclusion effects, leads to a tunneling conductance which vanishes 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 nonvanishing conductance is predicted.

【 授权许可】

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