Current-phase relation of YBa(2)Cu(3)O(7-x)/Nb unconventional superconductor junctions

Boris Chesca; Henk Jan Smilde; Hans Hilgenkamp

doi:10.4028/www.scientific.net/MSF.670.38

Current-phase relation of YBa(2)Cu(3)O(7-x)/Nb unconventional superconductor junctions

Boris Chesca, Henk Jan Smilde, Hans Hilgenkamp

Interfaces and Correlated Electron Systems

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

The knowledge of the current-phase relation (CPR) in superconducting junctions is essential in many applications like low-dissipative superconducting electronics or superconducting qubits for quantum computation. Theory predicts that unconventional superconductivity induces a significant second harmonic J2 in the CPR. Consequently, anomalies such as half-integer Shapiro steps should be observed in the microwave assisted current-voltage characteristics of the junctions. We performed electric transport measurements in YBa2Cu3O7-x/Nb unconventional superconductor junctions for 72 different tunneling directions in the ab plane and found no trace of such anomalies. This suggest that J2 is insignificantly small so that YBa2Cu3O7-x/Nb junctions have a purely sinusoidal CPR.

Original language	English
Pages (from-to)	38-41
Number of pages	4
Journal	Materials science forum
Volume	670
DOIs	https://doi.org/10.4028/www.scientific.net/MSF.670.38
Publication status	Published - 2011

Keywords

METIS-283721

Access to Document

10.4028/www.scientific.net/MSF.670.38

Cite this

@article{81b0da41937945b794525172d74f029e,

title = "Current-phase relation of YBa(2)Cu(3)O(7-x)/Nb unconventional superconductor junctions",

abstract = "The knowledge of the current-phase relation (CPR) in superconducting junctions is essential in many applications like low-dissipative superconducting electronics or superconducting qubits for quantum computation. Theory predicts that unconventional superconductivity induces a significant second harmonic J2 in the CPR. Consequently, anomalies such as half-integer Shapiro steps should be observed in the microwave assisted current-voltage characteristics of the junctions. We performed electric transport measurements in YBa2Cu3O7-x/Nb unconventional superconductor junctions for 72 different tunneling directions in the ab plane and found no trace of such anomalies. This suggest that J2 is insignificantly small so that YBa2Cu3O7-x/Nb junctions have a purely sinusoidal CPR.",

keywords = "METIS-283721",

author = "Boris Chesca and Smilde, {Henk Jan} and Hans Hilgenkamp",

year = "2011",

doi = "10.4028/www.scientific.net/MSF.670.38",

language = "English",

volume = "670",

pages = "38--41",

journal = "Materials science forum",

issn = "0255-5476",

publisher = "Trans Tech Publications Ltd",

}

TY - JOUR

T1 - Current-phase relation of YBa(2)Cu(3)O(7-x)/Nb unconventional superconductor junctions

AU - Chesca, Boris

AU - Smilde, Henk Jan

AU - Hilgenkamp, Hans

PY - 2011

Y1 - 2011

N2 - The knowledge of the current-phase relation (CPR) in superconducting junctions is essential in many applications like low-dissipative superconducting electronics or superconducting qubits for quantum computation. Theory predicts that unconventional superconductivity induces a significant second harmonic J2 in the CPR. Consequently, anomalies such as half-integer Shapiro steps should be observed in the microwave assisted current-voltage characteristics of the junctions. We performed electric transport measurements in YBa2Cu3O7-x/Nb unconventional superconductor junctions for 72 different tunneling directions in the ab plane and found no trace of such anomalies. This suggest that J2 is insignificantly small so that YBa2Cu3O7-x/Nb junctions have a purely sinusoidal CPR.

AB - The knowledge of the current-phase relation (CPR) in superconducting junctions is essential in many applications like low-dissipative superconducting electronics or superconducting qubits for quantum computation. Theory predicts that unconventional superconductivity induces a significant second harmonic J2 in the CPR. Consequently, anomalies such as half-integer Shapiro steps should be observed in the microwave assisted current-voltage characteristics of the junctions. We performed electric transport measurements in YBa2Cu3O7-x/Nb unconventional superconductor junctions for 72 different tunneling directions in the ab plane and found no trace of such anomalies. This suggest that J2 is insignificantly small so that YBa2Cu3O7-x/Nb junctions have a purely sinusoidal CPR.

KW - METIS-283721

U2 - 10.4028/www.scientific.net/MSF.670.38

DO - 10.4028/www.scientific.net/MSF.670.38

M3 - Article

SN - 0255-5476

VL - 670

SP - 38

EP - 41

JO - Materials science forum

JF - Materials science forum

ER -

Current-phase relation of YBa(2)Cu(3)O(7-x)/Nb unconventional superconductor junctions

Abstract

Keywords

Access to Document

Fingerprint

Cite this