Photoelectron spectromicroscopy study of metal–insulator transition in NaxWO3
We have investigated the validity of percolation model, which is quite often invoked to explain the metal–insulator transition in sodium tungsten bronzes, NaxWO3 by photoelectron spectromicroscopy. The spatially resolved direct spectromicroscopic probing on both the insulating and metallic phases of...
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| Veröffentlicht in: | Solid state communications 2013-07, Vol.166, p.66-69 |
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| container_title | Solid state communications |
| container_volume | 166 |
| creator | Paul, Sanhita Ghosh, Anirudha Dudin, Pavel Barinov, Alexei Chakraborty, Anirban Ray, Sugata Sarma, D.D. Oishi, Shuji Raj, Satyabrata |
| description | We have investigated the validity of percolation model, which is quite often invoked to explain the metal–insulator transition in sodium tungsten bronzes, NaxWO3 by photoelectron spectromicroscopy. The spatially resolved direct spectromicroscopic probing on both the insulating and metallic phases of high quality single crystals of NaxWO3 reveals the absence of any microscopic inhomogeneities embedded in the system within the experimental limit. Neither any metallic domains in the insulating host nor any insulating domains in the metallic host have been found to support the validity of percolation model to explain the metal–insulator transition in NaxWO3. The possible origin of insulating phase in NaxWO3 is due to the Anderson localization of all the states near EF. The localization occurs because of the strong disorder arising from random distribution of Na+ ions in the WO3 lattice.
•Metal–insulator transition investigation in NaxWO3 by photoelectron spectromicroscopy.•Experimental verification of the validity of percolation model.•Spatially resolved spectromicroscopic probing on both insulating and metallic phases.•Absence of microscopic inhomogeneities in NaxWO3 within the experimental limit. |
| doi_str_mv | 10.1016/j.ssc.2013.05.008 |
| format | Article |
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•Metal–insulator transition investigation in NaxWO3 by photoelectron spectromicroscopy.•Experimental verification of the validity of percolation model.•Spatially resolved spectromicroscopic probing on both insulating and metallic phases.•Absence of microscopic inhomogeneities in NaxWO3 within the experimental limit.</description><identifier>ISSN: 0038-1098</identifier><identifier>EISSN: 1879-2766</identifier><identifier>DOI: 10.1016/j.ssc.2013.05.008</identifier><identifier>CODEN: SSCOA4</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>A. Insulators ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; D. Phase transitions ; E. Photoelectron spectroscopies ; E. Synchrotron radiation ; Electron states ; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures ; Exact sciences and technology ; Localization effects (anderson or weak localization) ; Metal-insulator transitions and other electronic transitions ; Physics ; Surface and interface electron states</subject><ispartof>Solid state communications, 2013-07, Vol.166, p.66-69</ispartof><rights>2013 Elsevier Ltd</rights><rights>2014 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0038109813002342$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=27508609$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Paul, Sanhita</creatorcontrib><creatorcontrib>Ghosh, Anirudha</creatorcontrib><creatorcontrib>Dudin, Pavel</creatorcontrib><creatorcontrib>Barinov, Alexei</creatorcontrib><creatorcontrib>Chakraborty, Anirban</creatorcontrib><creatorcontrib>Ray, Sugata</creatorcontrib><creatorcontrib>Sarma, D.D.</creatorcontrib><creatorcontrib>Oishi, Shuji</creatorcontrib><creatorcontrib>Raj, Satyabrata</creatorcontrib><title>Photoelectron spectromicroscopy study of metal–insulator transition in NaxWO3</title><title>Solid state communications</title><description>We have investigated the validity of percolation model, which is quite often invoked to explain the metal–insulator transition in sodium tungsten bronzes, NaxWO3 by photoelectron spectromicroscopy. The spatially resolved direct spectromicroscopic probing on both the insulating and metallic phases of high quality single crystals of NaxWO3 reveals the absence of any microscopic inhomogeneities embedded in the system within the experimental limit. Neither any metallic domains in the insulating host nor any insulating domains in the metallic host have been found to support the validity of percolation model to explain the metal–insulator transition in NaxWO3. The possible origin of insulating phase in NaxWO3 is due to the Anderson localization of all the states near EF. The localization occurs because of the strong disorder arising from random distribution of Na+ ions in the WO3 lattice.
•Metal–insulator transition investigation in NaxWO3 by photoelectron spectromicroscopy.•Experimental verification of the validity of percolation model.•Spatially resolved spectromicroscopic probing on both insulating and metallic phases.•Absence of microscopic inhomogeneities in NaxWO3 within the experimental limit.</description><subject>A. Insulators</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>D. Phase transitions</subject><subject>E. Photoelectron spectroscopies</subject><subject>E. Synchrotron radiation</subject><subject>Electron states</subject><subject>Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures</subject><subject>Exact sciences and technology</subject><subject>Localization effects (anderson or weak localization)</subject><subject>Metal-insulator transitions and other electronic transitions</subject><subject>Physics</subject><subject>Surface and interface electron states</subject><issn>0038-1098</issn><issn>1879-2766</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNotkLFOwzAYhC0EEqXwAGxZGBN-201siwlVUJAqylCJ0bIdR7hK48h2Ed14B96QJ8GlTPcP95_uPoSuMVQYcHO7qWI0FQFMK6grAH6CJpgzURLWNKdoAkB5iUHwc3QR4wYAGGd4glav7z5521uTgh-KOP4dW2eCj8aP-yKmXbsvfFdsbVL9z9e3G-KuV8mHIgU1RJdc_nND8aI-31b0Ep11qo_26l-naP34sJ4_lcvV4nl-vywtoSyV2lDdcay0MNCQxkKrZ1obYsDCrKYE63YmmGKstUowg1vONTRK1KZTPEdM0c0xdlTRqL7LTYyLcgxuq8JeElYDb0Bk393RZ3OXD2eDjMbZwdjWhbxUtt5JDPKAUG5kRigPCCXUMiOkv7OuaWA</recordid><startdate>20130701</startdate><enddate>20130701</enddate><creator>Paul, Sanhita</creator><creator>Ghosh, Anirudha</creator><creator>Dudin, Pavel</creator><creator>Barinov, Alexei</creator><creator>Chakraborty, Anirban</creator><creator>Ray, Sugata</creator><creator>Sarma, D.D.</creator><creator>Oishi, Shuji</creator><creator>Raj, Satyabrata</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope></search><sort><creationdate>20130701</creationdate><title>Photoelectron spectromicroscopy study of metal–insulator transition in NaxWO3</title><author>Paul, Sanhita ; Ghosh, Anirudha ; Dudin, Pavel ; Barinov, Alexei ; Chakraborty, Anirban ; Ray, Sugata ; Sarma, D.D. ; Oishi, Shuji ; Raj, Satyabrata</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-e237t-bc3bf81ab9c0626e0db4bbc2c0e045321bd497a77dea97c1d88b06a95cfa8e23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>A. Insulators</topic><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>D. Phase transitions</topic><topic>E. Photoelectron spectroscopies</topic><topic>E. Synchrotron radiation</topic><topic>Electron states</topic><topic>Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures</topic><topic>Exact sciences and technology</topic><topic>Localization effects (anderson or weak localization)</topic><topic>Metal-insulator transitions and other electronic transitions</topic><topic>Physics</topic><topic>Surface and interface electron states</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Paul, Sanhita</creatorcontrib><creatorcontrib>Ghosh, Anirudha</creatorcontrib><creatorcontrib>Dudin, Pavel</creatorcontrib><creatorcontrib>Barinov, Alexei</creatorcontrib><creatorcontrib>Chakraborty, Anirban</creatorcontrib><creatorcontrib>Ray, Sugata</creatorcontrib><creatorcontrib>Sarma, D.D.</creatorcontrib><creatorcontrib>Oishi, Shuji</creatorcontrib><creatorcontrib>Raj, Satyabrata</creatorcontrib><collection>Pascal-Francis</collection><jtitle>Solid state communications</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Paul, Sanhita</au><au>Ghosh, Anirudha</au><au>Dudin, Pavel</au><au>Barinov, Alexei</au><au>Chakraborty, Anirban</au><au>Ray, Sugata</au><au>Sarma, D.D.</au><au>Oishi, Shuji</au><au>Raj, Satyabrata</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Photoelectron spectromicroscopy study of metal–insulator transition in NaxWO3</atitle><jtitle>Solid state communications</jtitle><date>2013-07-01</date><risdate>2013</risdate><volume>166</volume><spage>66</spage><epage>69</epage><pages>66-69</pages><issn>0038-1098</issn><eissn>1879-2766</eissn><coden>SSCOA4</coden><abstract>We have investigated the validity of percolation model, which is quite often invoked to explain the metal–insulator transition in sodium tungsten bronzes, NaxWO3 by photoelectron spectromicroscopy. The spatially resolved direct spectromicroscopic probing on both the insulating and metallic phases of high quality single crystals of NaxWO3 reveals the absence of any microscopic inhomogeneities embedded in the system within the experimental limit. Neither any metallic domains in the insulating host nor any insulating domains in the metallic host have been found to support the validity of percolation model to explain the metal–insulator transition in NaxWO3. The possible origin of insulating phase in NaxWO3 is due to the Anderson localization of all the states near EF. The localization occurs because of the strong disorder arising from random distribution of Na+ ions in the WO3 lattice.
•Metal–insulator transition investigation in NaxWO3 by photoelectron spectromicroscopy.•Experimental verification of the validity of percolation model.•Spatially resolved spectromicroscopic probing on both insulating and metallic phases.•Absence of microscopic inhomogeneities in NaxWO3 within the experimental limit.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.ssc.2013.05.008</doi><tpages>4</tpages></addata></record> |
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| subjects | A. Insulators Condensed matter: electronic structure, electrical, magnetic, and optical properties D. Phase transitions E. Photoelectron spectroscopies E. Synchrotron radiation Electron states Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Exact sciences and technology Localization effects (anderson or weak localization) Metal-insulator transitions and other electronic transitions Physics Surface and interface electron states |
| title | Photoelectron spectromicroscopy study of metal–insulator transition in NaxWO3 |
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