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d-Wave YBCO dc superconductive quantum interference devices (dc SQUIDs)

Floriana Lombardi (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; Thilo Bauch (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik)
High-Temperature Superconductors (2011)
[Kapitel]

The discovery of High Critical Temperature Superconductors (HTS) generated great activity to develop dc Superconductive Quantum Interference Devices (SQUIDs), with operating temperatures up to the boiling point of liquid nitrogen, 77. K.It was immediately apparent that small-scale devices, like SQUIDs, would require the development of thin-film techniques and novel Josephson junction's fabrication technologies. At present, grain-boundary junctions are the most widely used in SQUIDs. However, their properties are strongly affected by the d-wave symmetry of the order parameter. As a consequence the static and dynamic properties of HTS SQUIDs can be profoundly modified. The d-wave symmetry also offers the possibility to design π-SQUIDs showing a complementary behavior in magnetic field, compared to conventional ones, as well as dc SQUIDs with a double well potential. In this chapter the new Josephson phenomenology of HTS SQUIDs is derived, compared with experimental data available in literature, and discussed in view of future novel applications. © 2011 Woodhead Publishing Limited All rights reserved.

Nyckelord: π-SQUID , High critical temperature , Josephson junction , Phase dynamics,'silent' quantum bit , Phase relation , Superconductor grain boundary , Unconventional current



Denna post skapades 2016-05-11. Senast ändrad 2016-07-19.
CPL Pubid: 236219

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik

Ämnesområden

Elektroteknik och elektronik

Chalmers infrastruktur