Transport studies in a gate-tunable three-terminal Josephson junction
Josephson junctions with three or more superconducting leads have been predicted to exhibit topological effects in the presence of few conducting modes within the interstitial normal material. Such behavior, of relevance for topologically protected quantum bits, would lead to specific transport feat...
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creator | Graziano, Gino V. Lee, Joon Sue Pendharkar, Mihir Palmstrøm, Chris J. Pribiag, Vlad S. |
description | Josephson junctions with three or more superconducting leads have been predicted to exhibit topological effects in the presence of few conducting modes within the interstitial normal material. Such behavior, of relevance for topologically protected quantum bits, would lead to specific transport features measured between terminals, with topological phase transitions occurring as a function of phase and voltage bias. Although conventional, two-terminal Josephson junctions have been studied extensively, multiterminal devices have received relatively little attention to date. Motivated in part by the possibility to ultimately observe topological phenomena in multiterminal Josephson devices, as well as their potential for coupling gatemon qubits, here we describe the superconducting features of a top-gated mesoscopic three-terminal Josephson device. The device is based on an InAs two-dimensional electron gas proximitized by epitaxial aluminum. We map out the transport properties of the device as a function of bias currents, top gate voltage, and magnetic field. We find a very good agreement between the zero-field experimental phase diagram and a resistively and capacitively shunted junction computational model. |
doi_str_mv | 10.1103/PhysRevB.101.054510 |
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Such behavior, of relevance for topologically protected quantum bits, would lead to specific transport features measured between terminals, with topological phase transitions occurring as a function of phase and voltage bias. Although conventional, two-terminal Josephson junctions have been studied extensively, multiterminal devices have received relatively little attention to date. Motivated in part by the possibility to ultimately observe topological phenomena in multiterminal Josephson devices, as well as their potential for coupling gatemon qubits, here we describe the superconducting features of a top-gated mesoscopic three-terminal Josephson device. The device is based on an InAs two-dimensional electron gas proximitized by epitaxial aluminum. We map out the transport properties of the device as a function of bias currents, top gate voltage, and magnetic field. 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B</title><description>Josephson junctions with three or more superconducting leads have been predicted to exhibit topological effects in the presence of few conducting modes within the interstitial normal material. Such behavior, of relevance for topologically protected quantum bits, would lead to specific transport features measured between terminals, with topological phase transitions occurring as a function of phase and voltage bias. Although conventional, two-terminal Josephson junctions have been studied extensively, multiterminal devices have received relatively little attention to date. Motivated in part by the possibility to ultimately observe topological phenomena in multiterminal Josephson devices, as well as their potential for coupling gatemon qubits, here we describe the superconducting features of a top-gated mesoscopic three-terminal Josephson device. The device is based on an InAs two-dimensional electron gas proximitized by epitaxial aluminum. 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B</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Graziano, Gino V.</au><au>Lee, Joon Sue</au><au>Pendharkar, Mihir</au><au>Palmstrøm, Chris J.</au><au>Pribiag, Vlad S.</au><aucorp>Univ. of Minnesota, Minneapolis, MN (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Transport studies in a gate-tunable three-terminal Josephson junction</atitle><jtitle>Physical review. B</jtitle><date>2020-02-24</date><risdate>2020</risdate><volume>101</volume><issue>5</issue><spage>1</spage><pages>1-</pages><artnum>054510</artnum><issn>2469-9950</issn><eissn>2469-9969</eissn><abstract>Josephson junctions with three or more superconducting leads have been predicted to exhibit topological effects in the presence of few conducting modes within the interstitial normal material. 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subjects | Aluminum Bias CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY devices dilutoin refrigerator Electric potential Electron gas evaporation III-V semiconductors Josephson effect Josephson junctions lithography mesoscopics molecular beam epitaxy narrow band gap systems Phase diagrams Phase transitions quantum wells Qubits (quantum computing) resistivity measurements Superconductivity topological materials Topology Transport buildings, stations and terminals transport phenomena Transport properties two-dimensional electron system Voltage |
title | Transport studies in a gate-tunable three-terminal Josephson junction |
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