Flux-tunable Josephson diode effect in a hybrid four-terminal Josephson junction

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00584822" target="_blank" >RIV/68378271:_____/24:00584822 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0360844" target="_blank" >https://hdl.handle.net/11104/0360844</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsnano.4c01642" target="_blank" >10.1021/acsnano.4c01642</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Flux-tunable Josephson diode effect in a hybrid four-terminal Josephson junction

Popis výsledku v původním jazyce

We investigate the direction-dependent switching current in a flux-tunable four-terminal Josephson junction defined in an InAs/Al two-dimensional heterostructure. The device exhibits the Josephson diode effect with switching currents that depend on the sign of the bias current. The superconducting diode efficiency, reaching a maximum of |eta| approximate to 34%, is widely tunable & horbar,both in amplitude and sign & horbar,as a function of magnetic fluxes and gate voltages. Our observations are supported by a circuit model of three parallel Josephson junctions with nonsinusoidal current-phase relation. With respect to conventional Josephson interferometers, phase-tunable multiterminal Josephson junctions enable large diode efficiencies in structurally symmetric devices, where local magnetic fluxes generated on the chip break both time-reversal and spatial symmetries. Our work presents an approach for developing Josephson diodes with wide-range tunability that do not rely on exotic materials.

Název v anglickém jazyce

Flux-tunable Josephson diode effect in a hybrid four-terminal Josephson junction

Popis výsledku anglicky

We investigate the direction-dependent switching current in a flux-tunable four-terminal Josephson junction defined in an InAs/Al two-dimensional heterostructure. The device exhibits the Josephson diode effect with switching currents that depend on the sign of the bias current. The superconducting diode efficiency, reaching a maximum of |eta| approximate to 34%, is widely tunable & horbar,both in amplitude and sign & horbar,as a function of magnetic fluxes and gate voltages. Our observations are supported by a circuit model of three parallel Josephson junctions with nonsinusoidal current-phase relation. With respect to conventional Josephson interferometers, phase-tunable multiterminal Josephson junctions enable large diode efficiencies in structurally symmetric devices, where local magnetic fluxes generated on the chip break both time-reversal and spatial symmetries. Our work presents an approach for developing Josephson diodes with wide-range tunability that do not rely on exotic materials.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ACS Nano

ISSN

1936-0851

e-ISSN

1936-086X

Svazek periodika

18

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

9221-9231

Kód UT WoS článku

001186318300001

EID výsledku v databázi Scopus

2-s2.0-85188178925