Spin dependent resonant electron tunneling through planar graphene barriers
We study spin-dependent electron transport properties of two dimensional graphene double and triple barrier junctions via first-principles calculations. The double barrier junction consists of two graphene leads, a quantum well of zigzag graphene nanoribbon (ZGNR) in the center, and two vacuum barri...
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| Veröffentlicht in: | Carbon (New York) 2019-04, Vol.144 (C), p.362-369 |
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| creator | Liu, Shuanglong Wang, Yun-Peng Fry, James N. Cheng, Hai-Ping |
| description | We study spin-dependent electron transport properties of two dimensional graphene double and triple barrier junctions via first-principles calculations. The double barrier junction consists of two graphene leads, a quantum well of zigzag graphene nanoribbon (ZGNR) in the center, and two vacuum barriers separating the ZGNR from the two leads. Resonant electron tunneling occurs when the energy bands of graphene and ZGNR are well aligned in energy and wavevector. Highly spin-polarized electron transmission arises in such junctions when the two edges of the center ZGNR are in the ferromagnetic configuration. The spin polarization of the electron transmission at the Fermi energy can be tuned by gate voltage. We further investigate the dependence of the electron transmission on the width of the ZGNR, effects on barrier height when replacing vacuum by h-BN, and the consequence of replacing a double barrier by a triple barrier.
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| doi_str_mv | 10.1016/j.carbon.2018.12.035 |
| format | Article |
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[Display omitted]</description><identifier>ISSN: 0008-6223</identifier><identifier>EISSN: 1873-3891</identifier><identifier>DOI: 10.1016/j.carbon.2018.12.035</identifier><language>eng</language><publisher>New York: Elsevier Ltd</publisher><subject>Dependence ; Double barrier ; Electron spin ; Electron transport ; Electron tunneling ; Energy bands ; Energy transmission ; Ferromagnetism ; First principles ; Graphene ; Polarization (spin alignment) ; Quantum wells ; Spin-dependent transport ; Studies ; Transmission electron microscopy ; Transport properties</subject><ispartof>Carbon (New York), 2019-04, Vol.144 (C), p.362-369</ispartof><rights>2018</rights><rights>Copyright Elsevier BV Apr 2019</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c407t-7aa6ba3cc1cda2a0be424352935d13d1ebae737685eb09a2f48bdee849780ed13</citedby><cites>FETCH-LOGICAL-c407t-7aa6ba3cc1cda2a0be424352935d13d1ebae737685eb09a2f48bdee849780ed13</cites><orcidid>0000-0003-3253-5491 ; 0000000332535491</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.carbon.2018.12.035$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,777,781,882,3538,27906,27907,45977</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/1529914$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Liu, Shuanglong</creatorcontrib><creatorcontrib>Wang, Yun-Peng</creatorcontrib><creatorcontrib>Fry, James N.</creatorcontrib><creatorcontrib>Cheng, Hai-Ping</creatorcontrib><creatorcontrib>Lawrence Berkeley National Laboratory-National Energy Research Scientific Computing Center (NERSC)</creatorcontrib><title>Spin dependent resonant electron tunneling through planar graphene barriers</title><title>Carbon (New York)</title><description>We study spin-dependent electron transport properties of two dimensional graphene double and triple barrier junctions via first-principles calculations. The double barrier junction consists of two graphene leads, a quantum well of zigzag graphene nanoribbon (ZGNR) in the center, and two vacuum barriers separating the ZGNR from the two leads. Resonant electron tunneling occurs when the energy bands of graphene and ZGNR are well aligned in energy and wavevector. Highly spin-polarized electron transmission arises in such junctions when the two edges of the center ZGNR are in the ferromagnetic configuration. The spin polarization of the electron transmission at the Fermi energy can be tuned by gate voltage. We further investigate the dependence of the electron transmission on the width of the ZGNR, effects on barrier height when replacing vacuum by h-BN, and the consequence of replacing a double barrier by a triple barrier.
[Display omitted]</description><subject>Dependence</subject><subject>Double barrier</subject><subject>Electron spin</subject><subject>Electron transport</subject><subject>Electron tunneling</subject><subject>Energy bands</subject><subject>Energy transmission</subject><subject>Ferromagnetism</subject><subject>First principles</subject><subject>Graphene</subject><subject>Polarization (spin alignment)</subject><subject>Quantum wells</subject><subject>Spin-dependent transport</subject><subject>Studies</subject><subject>Transmission electron microscopy</subject><subject>Transport properties</subject><issn>0008-6223</issn><issn>1873-3891</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp9kE9LxDAQxYMouK5-Aw9Fz62ZJG3TiyCL_3DBg3oOaTq77bImNckKfntT6tnTzMBvHu89Qi6BFkChutkVRvvW2YJRkAWwgvLyiCxA1jznsoFjsqCUyrxijJ-SsxB26RQSxIK8vI2DzToc0XZoY-YxOKvTgns00TubxYO1uB_sNou9d4dtn417bbXPtl6PPVrMWu39gD6ck5ON3ge8-JtL8vFw_756ytevj8-ru3VuBK1jXmtdtZobA6bTTNMWBRO8ZA0vO-AdYKux5nUlS2xpo9lGyLZDlKKpJcWELMnVrOtCHFQwQ0TTG5dsmqggCTUgEnQ9Q6N3XwcMUe3cwdvkSzEGsikllDRRYqaMdyF43KjRD5_a_yigaupW7dTcrZq6VcBU6ja93c5vmGJ-p-yTC7QGu8FPJjo3_C_wCzlchPQ</recordid><startdate>201904</startdate><enddate>201904</enddate><creator>Liu, Shuanglong</creator><creator>Wang, Yun-Peng</creator><creator>Fry, James N.</creator><creator>Cheng, Hai-Ping</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0003-3253-5491</orcidid><orcidid>https://orcid.org/0000000332535491</orcidid></search><sort><creationdate>201904</creationdate><title>Spin dependent resonant electron tunneling through planar graphene barriers</title><author>Liu, Shuanglong ; Wang, Yun-Peng ; Fry, James N. ; Cheng, Hai-Ping</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c407t-7aa6ba3cc1cda2a0be424352935d13d1ebae737685eb09a2f48bdee849780ed13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Dependence</topic><topic>Double barrier</topic><topic>Electron spin</topic><topic>Electron transport</topic><topic>Electron tunneling</topic><topic>Energy bands</topic><topic>Energy transmission</topic><topic>Ferromagnetism</topic><topic>First principles</topic><topic>Graphene</topic><topic>Polarization (spin alignment)</topic><topic>Quantum wells</topic><topic>Spin-dependent transport</topic><topic>Studies</topic><topic>Transmission electron microscopy</topic><topic>Transport properties</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Liu, Shuanglong</creatorcontrib><creatorcontrib>Wang, Yun-Peng</creatorcontrib><creatorcontrib>Fry, James N.</creatorcontrib><creatorcontrib>Cheng, Hai-Ping</creatorcontrib><creatorcontrib>Lawrence Berkeley National Laboratory-National Energy Research Scientific Computing Center (NERSC)</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>OSTI.GOV</collection><jtitle>Carbon (New York)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Liu, Shuanglong</au><au>Wang, Yun-Peng</au><au>Fry, James N.</au><au>Cheng, Hai-Ping</au><aucorp>Lawrence Berkeley National Laboratory-National Energy Research Scientific Computing Center (NERSC)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Spin dependent resonant electron tunneling through planar graphene barriers</atitle><jtitle>Carbon (New York)</jtitle><date>2019-04</date><risdate>2019</risdate><volume>144</volume><issue>C</issue><spage>362</spage><epage>369</epage><pages>362-369</pages><issn>0008-6223</issn><eissn>1873-3891</eissn><abstract>We study spin-dependent electron transport properties of two dimensional graphene double and triple barrier junctions via first-principles calculations. The double barrier junction consists of two graphene leads, a quantum well of zigzag graphene nanoribbon (ZGNR) in the center, and two vacuum barriers separating the ZGNR from the two leads. Resonant electron tunneling occurs when the energy bands of graphene and ZGNR are well aligned in energy and wavevector. Highly spin-polarized electron transmission arises in such junctions when the two edges of the center ZGNR are in the ferromagnetic configuration. The spin polarization of the electron transmission at the Fermi energy can be tuned by gate voltage. We further investigate the dependence of the electron transmission on the width of the ZGNR, effects on barrier height when replacing vacuum by h-BN, and the consequence of replacing a double barrier by a triple barrier.
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| ispartof | Carbon (New York), 2019-04, Vol.144 (C), p.362-369 |
| issn | 0008-6223 1873-3891 |
| language | eng |
| recordid | cdi_osti_scitechconnect_1529914 |
| source | Elsevier ScienceDirect Journals |
| subjects | Dependence Double barrier Electron spin Electron transport Electron tunneling Energy bands Energy transmission Ferromagnetism First principles Graphene Polarization (spin alignment) Quantum wells Spin-dependent transport Studies Transmission electron microscopy Transport properties |
| title | Spin dependent resonant electron tunneling through planar graphene barriers |
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