Posted on

SQEL at the Nanowire Week 2019

Elia Strambini during his talk at Nanowire Week 2019 Elia Strambini during his talk at Nanowire Week 2019

The Nanowire Week is one of the biggest conferences on nanowires merging two well-established and highly successful annual workshops: NANOWIRES and the Nanowire Growth Workshop. The 2019 edition has been held in Pisa from September 23 to 27 organized by NEST, Scuola Normale Superiore and CNR Istituto Nanoscienze.

Our researcher Elia Strambini presented some unpublished results of our group in a a talk titled “Magnetically-driven anomalous phase shift in InAs nanowire Josephson Junctions” about the revealing of an anomalous phase shift in a Al/InAs(NW)/Al Josephson junction.

Posted on

“Field-Effect Controllable Metallic Josephson Interferometer” published on Nano Letters

“Field-Effect Controllable Metallic Josephson Interferometer” published on Nano Letters “Field-Effect Controllable Metallic Josephson Interferometer” published on Nano Letters

A new research carried out at the SQEL report the realization of a titanium-based monolithic superconducting quantum interference device (SQUID) which can be tuned by applying a gate bias to its two Josephson junctions.

The research, published on Nano Letters by F. Paolucci and co-authors, points out the strong implications of the apparent coupling of a static electric field to the macroscopic phase of the superconducting condensate.

Beyond that, this class of quantum interferometers could represent a breakthrough for several applications such as digital electronics, quantum computing, sensitive magnetometry, and single-photon detection.

Posted on

The project T-CONVERSE “Temperature-to-phase CONVErsion THz Radiation SEnsors” has been funded!

The ATTRACT project T-CONVERSE "Temperature-to-phase CONVErsion THz Radiation SEnsors" has been funded! ATTRACT is a pioneering initiative bringing together Europe’s research & industrial communities to lead the next generation of detection & imaging technologies.

The project T-CONVERSE “Temperature-to-phase CONVErsion THz Radiation SEnsors”, a collaboration between INFN Sezione di Pisa (F. Paolucci), CNR-Nano (F. Giazotto) and SeeQC-Eu (O. Mukhanov), is one of the projects recommended for funding in the call ATTRACT for the development of breakthrough sensing and imaging technology.

More information on: https://attract-eu.com/selected-projects/temperature-to-phase-conversion-thz-radiation-sensors-t-converse/

Posted on

SQEL students at NanoQI 2019

SQEL students at NanoQI'19 SQEL students at NanoQI’19

Advances in nanofabrication and the understanding and control of the quantum properties of matter are laying the groundwork for revolutionary new technologies and information processing capabilities. 

Four PhD students (L. Bours, A. Iorio, C. Puglia and F. Vischi) of the SQEL group were admitted to attend the 2019 Nanotechnology meets Quantum Information (NanoQI) summer school in Donostia-San Sebastián (Spain).  

Eight leading experts have been reviewed the experimental and theoretical state-of-the-art for some of the most promising implementations such as semiconductor quantum dots, superconducting circuits, topological insulators and much more.

During the school, our students showcased the research carried out at SQEL in three posters: “Field-effect metallic superconducting electronics” (by C. Puglia), “Field-effect controllable metallic Josephson interferometer” (by F. Vischi) and “Revealing the Spin-Orbit Interaction in InAs nanowires” (by A. Iorio).

  • Group picture at NanoQI’19
  • A. Iorio, F. Vischi and C. Puglia while presenting their posters at NanoQI’19
Posted on

Josephson Field-Effect Transistors Based on All-Metallic Al/Cu/Al Proximity Nanojunctions

"Josephson Field-Effect Transistors Based on All-Metallic Al/Cu/Al Proximity Nanojunctions" published on ACS Nano “Josephson Field-Effect Transistors Based on All-Metallic Al/Cu/Al Proximity Nanojunctions” published on ACS Nano

Researchers from SQEL have just realized field-effect controlled Josephson transistors based on proximity all-metallic mesoscopic superconductor-normal metal-superconductor junctions.

The research, published on ACS Nano by G. De Simoni and co-authors, suggests that the mechanism at the basis of the superconducting field-effect is quite general and does not rely on the existence of a true pairing potential, but rather the presence of superconducting correlations is enough for the effect to occur.

On the technological side, our findings widen the family of materials available for the implementation of all-metallic field-effect transistors to synthetic proximity-induced superconductors.