ac Josephson Effect and Resonant Cooper Pair Tunneling Emission of a Single Cooper Pair Transistor

P.-M. Billangeon; F. Pierre; H. Bouchiat; R. Deblock

doi:10.1103/PhysRevLett.98.216802

← Back to search

ac Josephson Effect and Resonant Cooper Pair Tunneling Emission of a Single Cooper Pair Transistor

P.-M. Billangeon, F. Pierre, H. Bouchiat, R. Deblock

DOI 10.1103/PhysRevLett.98.216802 · Physical Review Letters

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We measure the high-frequency emission of a single Cooper pair transistor (SCPT) in the regime where transport is only due to tunneling of Cooper pairs. This is achieved by coupling on chip the SCPT to a superconductor-insulator-superconductor junction and by measuring the photon assisted tunneling current of quasiparticles across the junction. This technique allows a direct detection of the ac Josephson effect of the SCPT and provides evidence of Landau-Zener transitions for proper gate voltage. The emission in the regime of resonant Cooper pair tunneling is also investigated. It is interpreted in terms of transitions between charge states coupled by the Josephson effect.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown