Tunneling Spectroscopy of Quantum Hall States in Bilayer Graphene p-n Junctions
We report tunneling transport in spatially controlled networks of quantum Hall (QH) edge states in bilayer graphene. By manipulating the separation, location, and spatial span of QH edge states via gate-defined electrostatics, we observe resonant tunneling between copropagating QH states across inco...
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| Veröffentlicht in: | Physical review letters 2019-04, Vol.122 (14), p.146801-146801, Article 146801 |
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| container_end_page | 146801 |
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| container_issue | 14 |
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| container_title | Physical review letters |
| container_volume | 122 |
| creator | Wang, Ke Harzheim, Achim Taniguchi, Takashi Watanabei, Kenji Lee, Ji Ung Kim, Philip |
| description | We report tunneling transport in spatially controlled networks of quantum Hall (QH) edge states in bilayer graphene. By manipulating the separation, location, and spatial span of QH edge states via gate-defined electrostatics, we observe resonant tunneling between copropagating QH states across incompressible strips. Employing spectroscopic tunneling measurements and an analytical model, we characterize the energy gap, width, density of states, and compressibility of the QH edge states with high precision and sensitivity within the same device. The capability to engineer the QH edge network also provides an opportunity to build future quantum electronic devices with electrostatic manipulation of QH edge states, supported by rich underlying physics. |
| doi_str_mv | 10.1103/PhysRevLett.122.146801 |
| format | Article |
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By manipulating the separation, location, and spatial span of QH edge states via gate-defined electrostatics, we observe resonant tunneling between copropagating QH states across incompressible strips. Employing spectroscopic tunneling measurements and an analytical model, we characterize the energy gap, width, density of states, and compressibility of the QH edge states with high precision and sensitivity within the same device. 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The capability to engineer the QH edge network also provides an opportunity to build future quantum electronic devices with electrostatic manipulation of QH edge states, supported by rich underlying physics.</description><subject>Bilayers</subject><subject>Compressibility</subject><subject>Computational fluid dynamics</subject><subject>Electronic devices</subject><subject>Electrostatics</subject><subject>Energy gap</subject><subject>Graphene</subject><subject>Mathematical models</subject><subject>P-n junctions</subject><subject>Resonant tunneling</subject><issn>0031-9007</issn><issn>1079-7114</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNpdkcFu1DAURa2Kqh1Kf6GyYMMmUz87tpMlVNCCRmqhZW05znMnVcYOsYM0f4_RFIS6eptzr3TfIeQC2BqAicu77T59x18bzHkNnK-hVg2DI7ICpttKA9SvyIoxAVXLmD4lr1N6YowBV80JORXAJKubdkVuH5YQcBzCI72f0OU5JhenPY2efltsyMuO3thxpPfZZkx0CPTjMNo9zvR6ttMWA9KpCvTrElweYkhvyLG3Y8Lz53tGfnz-9HB1U21ur79cfdhUTiiVKylQ1ELaXvctdMBRo7cNeu1FV0toQSp0shVND172YL3QTeE730knOtuLM_L20BtTHkxyQ0a3dbFscdmAZApUW6D3B2ia488FUza7ITkcRxswLslwzlsuuG50Qd-9QJ_iMocyoVAgGq1qXRdKHShX_pRm9Gaah52d9waY-ePF_OfFFC_m4KUEL57rl26H_b_YXxHiNwzLiyg</recordid><startdate>20190412</startdate><enddate>20190412</enddate><creator>Wang, Ke</creator><creator>Harzheim, Achim</creator><creator>Taniguchi, Takashi</creator><creator>Watanabei, Kenji</creator><creator>Lee, Ji Ung</creator><creator>Kim, Philip</creator><general>American Physical Society</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>7X8</scope><scope>OTOTI</scope></search><sort><creationdate>20190412</creationdate><title>Tunneling Spectroscopy of Quantum Hall States in Bilayer Graphene p-n Junctions</title><author>Wang, Ke ; Harzheim, Achim ; Taniguchi, Takashi ; Watanabei, Kenji ; Lee, Ji Ung ; Kim, Philip</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c366t-53e3435ad7d91b12e7efa8ef7f3b4519156ec5938d1f5d1af378435bfb5c3bad3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Bilayers</topic><topic>Compressibility</topic><topic>Computational fluid dynamics</topic><topic>Electronic devices</topic><topic>Electrostatics</topic><topic>Energy gap</topic><topic>Graphene</topic><topic>Mathematical models</topic><topic>P-n junctions</topic><topic>Resonant tunneling</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wang, Ke</creatorcontrib><creatorcontrib>Harzheim, Achim</creatorcontrib><creatorcontrib>Taniguchi, Takashi</creatorcontrib><creatorcontrib>Watanabei, Kenji</creatorcontrib><creatorcontrib>Lee, Ji Ung</creatorcontrib><creatorcontrib>Kim, Philip</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV</collection><jtitle>Physical review letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wang, Ke</au><au>Harzheim, Achim</au><au>Taniguchi, Takashi</au><au>Watanabei, Kenji</au><au>Lee, Ji Ung</au><au>Kim, Philip</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Tunneling Spectroscopy of Quantum Hall States in Bilayer Graphene p-n Junctions</atitle><jtitle>Physical review letters</jtitle><addtitle>Phys Rev Lett</addtitle><date>2019-04-12</date><risdate>2019</risdate><volume>122</volume><issue>14</issue><spage>146801</spage><epage>146801</epage><pages>146801-146801</pages><artnum>146801</artnum><issn>0031-9007</issn><eissn>1079-7114</eissn><abstract>We report tunneling transport in spatially controlled networks of quantum Hall (QH) edge states in bilayer graphene. 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| identifier | ISSN: 0031-9007 |
| ispartof | Physical review letters, 2019-04, Vol.122 (14), p.146801-146801, Article 146801 |
| issn | 0031-9007 1079-7114 |
| language | eng |
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| source | American Physical Society Journals; EZB-FREE-00999 freely available EZB journals |
| subjects | Bilayers Compressibility Computational fluid dynamics Electronic devices Electrostatics Energy gap Graphene Mathematical models P-n junctions Resonant tunneling |
| title | Tunneling Spectroscopy of Quantum Hall States in Bilayer Graphene p-n Junctions |
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