Coherent transport through T-shaped electrostatically coupled quantum dots
The Fano–Kondo resonance is studied in a system consisting of a pair of side-coupled double quantum dots attached to quantum wires. The double dots are capacitively coupled. The mean field slave boson approach and the equation of motion method are used. For symmetric dots Kondo effect has two possib...
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| Veröffentlicht in: | Journal of magnetism and magnetic materials 2007-03, Vol.310 (2), p.2423-2424 |
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| container_title | Journal of magnetism and magnetic materials |
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| creator | Lipinski, S. Krychowski, D. |
| description | The Fano–Kondo resonance is studied in a system consisting of a pair of side-coupled double quantum dots attached to quantum wires. The double dots are capacitively coupled. The mean field slave boson approach and the equation of motion method are used. For symmetric dots Kondo effect has two possible sources: spin and charge degeneracies. The conductance as a function of gate voltage is characterized by a Fano asymmetric parameter
q. For
q=0 a half-reflection is observed. The same value of transmission is expected in the limit
q→∞. For intermediate cases transmission line has a general asymmetric Fano-type shape. We show that by tuning the gate voltage or changing magnetic field, the single spin-orbital Kondo channel opens and the system can operate as a spin filter. |
| doi_str_mv | 10.1016/j.jmmm.2006.10.811 |
| format | Article |
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q. For
q=0 a half-reflection is observed. The same value of transmission is expected in the limit
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q. For
q=0 a half-reflection is observed. The same value of transmission is expected in the limit
q→∞. For intermediate cases transmission line has a general asymmetric Fano-type shape. We show that by tuning the gate voltage or changing magnetic field, the single spin-orbital Kondo channel opens and the system can operate as a spin filter.</description><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Electronic transport in condensed matter</subject><subject>Exact sciences and technology</subject><subject>Kondo effect</subject><subject>Magnetic properties and materials</subject><subject>Materials science</subject><subject>Nanoscale materials and structures: fabrication and characterization</subject><subject>Physics</subject><subject>Quantum dot</subject><subject>Quantum dots</subject><subject>Spin polarized transport</subject><issn>0304-8853</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNp9kD1PxDAMhjOAxHHwB5i6wNaSNGmaSizoxKdOYjnmKJe6NFXb9JIUiX9PqjuJjcmW_dp-_SB0Q3BGMOH3XdYNw5DlGPNYyAQhZ2iFKWapEAW9QJfedxhjwgRfofeNbcHBGJLg1Ogn62LWOjt_tcku9a2aoE6gBx2c9UEFo1Xf_yTazlMfO4dZjWEektoGf4XOG9V7uD7FNfp8ftptXtPtx8vb5nGbaspJSAXZE8z2BYdSEJ6zsmqU4JiVqqmFqkoKVUHLkmqiSU44hwareo85KzSjpS7pGt0d907OHmbwQQ7Ga-h7NYKdvcwrQRkpWBTmR6GO3r2DRk7ODMr9SILlgkp2ckElF1RLLaKKQ7en7crHX5tIRRv_Nyk4Ezg6XKOHow7iq98GnPTawKihNi7SkrU1_535BSMzgag</recordid><startdate>20070301</startdate><enddate>20070301</enddate><creator>Lipinski, S.</creator><creator>Krychowski, D.</creator><general>Elsevier B.V</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20070301</creationdate><title>Coherent transport through T-shaped electrostatically coupled quantum dots</title><author>Lipinski, S. ; Krychowski, D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c361t-81b104b56e78162479fa86047afd8a973e953773c1c12166ef0adb0645c437c73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>Electronic transport in condensed matter</topic><topic>Exact sciences and technology</topic><topic>Kondo effect</topic><topic>Magnetic properties and materials</topic><topic>Materials science</topic><topic>Nanoscale materials and structures: fabrication and characterization</topic><topic>Physics</topic><topic>Quantum dot</topic><topic>Quantum dots</topic><topic>Spin polarized transport</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lipinski, S.</creatorcontrib><creatorcontrib>Krychowski, D.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of magnetism and magnetic materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lipinski, S.</au><au>Krychowski, D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Coherent transport through T-shaped electrostatically coupled quantum dots</atitle><jtitle>Journal of magnetism and magnetic materials</jtitle><date>2007-03-01</date><risdate>2007</risdate><volume>310</volume><issue>2</issue><spage>2423</spage><epage>2424</epage><pages>2423-2424</pages><issn>0304-8853</issn><coden>JMMMDC</coden><abstract>The Fano–Kondo resonance is studied in a system consisting of a pair of side-coupled double quantum dots attached to quantum wires. The double dots are capacitively coupled. The mean field slave boson approach and the equation of motion method are used. For symmetric dots Kondo effect has two possible sources: spin and charge degeneracies. The conductance as a function of gate voltage is characterized by a Fano asymmetric parameter
q. For
q=0 a half-reflection is observed. The same value of transmission is expected in the limit
q→∞. For intermediate cases transmission line has a general asymmetric Fano-type shape. We show that by tuning the gate voltage or changing magnetic field, the single spin-orbital Kondo channel opens and the system can operate as a spin filter.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jmmm.2006.10.811</doi><tpages>2</tpages></addata></record> |
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| language | eng |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Electronic transport in condensed matter Exact sciences and technology Kondo effect Magnetic properties and materials Materials science Nanoscale materials and structures: fabrication and characterization Physics Quantum dot Quantum dots Spin polarized transport |
| title | Coherent transport through T-shaped electrostatically coupled quantum dots |
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