Abstract
A chain of superconductor–insulator–superconductor junctions based on Al–AlOx–Al nanostructures and fabricated using conventional lift-off lithography techniques was measured at ultra-low temperatures. At zero magnetic field, the low current bias dynamic resistance can reach values of ≈1011 Ω. It was demonstrated that the system can provide a decent quality current biasing circuit, enabling the observation of Coulomb blockade and Bloch oscillations in ultra-narrow Ti nanowires associated with the quantum phase-slip effect.
Highlights
The field of modern nanoelectronics is facing stagnation with respect to further miniaturization, deviating from Moore’s law [1]
Two main reason are quoted: severe heat dissipation per unit volume, and various quantum phenomena that drive the operation of ultra-small devices and make them different from devices in the conventional regime
The field of superconducting electronics is developing much faster mainly due to the understanding that the energy consumption of generation supercomputers can be as low as ≈10 MW, which is compared to values of ≈100 MW for conventional semiconductor complementary metal–oxide-semiconductor (CMOS) technology
Summary
The field of modern nanoelectronics is facing stagnation with respect to further miniaturization, deviating from Moore’s law [1]. There have been multiple suggestions regarding how to build quantum logic elements, such as quantum bits (qbits), including superconducting systems based on the Josephson effect. We present an experimental study of a quasi-1D chain of JJs. A sufficient high-frequency impedance was demonstrated to study the QPS phenomena without the undesired impact of Johnson noise typically associated with dissipative elements [12].
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