Detail publikace

Implementation of a Superconducting High Frequency Divider Circuit with NbN/TaXN/NbN Josephson Junctions

MICHAL, V.

Originální název

Implementation of a Superconducting High Frequency Divider Circuit with NbN/TaXN/NbN Josephson Junctions

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

Rapid Single Flux Quantum logics (RSFQ) based on superconducting NbN-TaXN-NbN Josephson junctions (SNS type), present strong advantages over Semiconductor based logics due to faster gates with much lower power dissipation. Thanks to high resistivity of TaXN sputtered barriers, Josephson junctions can operate at 9K in a relaxed cryogenic environment. In order to prepare a NbN ADC technology for space telecoms we have sputtered ~7nm thick TaXN barrier layer at 300 stupňů C showing the required insulator behaviour, low roughness with a large NbN electrodes critical temperature (Tc=15.5K). At 10K, Jc~10kA/cm2 and RnIc up to ~0.3 mV; Josephson behaviour is observed up to 14K. We are preparing a 10 to 15 photo-mask levels circuit technology to be ported in the Leti 200mm Si-MOS Fab. The advantages both in compactness, operating temperature and frequency (~200GHz clock) of self-shunted NbN junctions over Nb externally shunted ones is illustrated for a 1/64 frequency divider.

Klíčová slova

Superconducting High Frequency Divider, Josephson Junctions, operating temperature

Autoři

MICHAL, V.

Rok RIV

2007

Vydáno

1. 7. 2007

Nakladatel

UTEE, FEKT VUT v Brně

Místo

Paris

ISBN

978-80-214-3476-9

Kniha

TIEF 2007

Strany od

1

Strany do

4

Strany počet

4

BibTex

@inproceedings{BUT23539,
  author="Vratislav {Michal}",
  title="Implementation of a Superconducting High Frequency Divider Circuit with NbN/TaXN/NbN Josephson Junctions",
  booktitle="TIEF 2007",
  year="2007",
  pages="1--4",
  publisher="UTEE, FEKT VUT v Brně",
  address="Paris",
  isbn="978-80-214-3476-9"
}