Search results for: Byungki Cho

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Cho</title> <meta name="description" content="Search results for: Byungki Cho"> <meta name="keywords" content="Byungki Cho"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler ml-auto" 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id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="Byungki Cho"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 1</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Byungki Cho</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> Bulk Transport in Strongly Correlated Topological Insulator Samarium Hexaboride Using Hall Effect and Inverted Resistance Methods</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alexa%20Rakoski">Alexa Rakoski</a>, <a href="https://publications.waset.org/abstracts/search?q=Yun%20Suk%20Eo"> Yun Suk Eo</a>, <a href="https://publications.waset.org/abstracts/search?q=Cagliyan%20Kurdak"> Cagliyan Kurdak</a>, <a href="https://publications.waset.org/abstracts/search?q=Priscila%20F.%20S.%20Rosa"> Priscila F. S. Rosa</a>, <a href="https://publications.waset.org/abstracts/search?q=Zachary%20Fisk"> Zachary Fisk</a>, <a href="https://publications.waset.org/abstracts/search?q=Monica%20Ciomaga%20Hatnean"> Monica Ciomaga Hatnean</a>, <a href="https://publications.waset.org/abstracts/search?q=Geetha%20Balakrishnan"> Geetha Balakrishnan</a>, <a href="https://publications.waset.org/abstracts/search?q=Boyoun%20Kang"> Boyoun Kang</a>, <a href="https://publications.waset.org/abstracts/search?q=Myungsuk%20Song"> Myungsuk Song</a>, <a href="https://publications.waset.org/abstracts/search?q=Byungki%20Cho"> Byungki Cho</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Samarium hexaboride (SmB6) is a strongly correlated mixed valence material and Kondo insulator. In the resistance-temperature curve, SmB6 exhibits activated behavior from 4-40 K after the Kondo gap forms. However, below 4 K, the resistivity is temperature independent or weakly temperature dependent due to the appearance of a topologically protected surface state. Current research suggests that the surface of SmB6 is conductive while the bulk is truly insulating, different from conventional 3D TIs (Topological Insulators) like Bi₂Se₃ which are plagued by bulk conduction due to impurities. To better understand why the bulk of SmB6 is so different from conventional TIs, this study employed a new method, called inverted resistance, to explore the lowest temperatures, as well as standard Hall measurements for the rest of the temperature range. In the inverted resistance method, current flows from an inner contact to an outer ring, and voltage is measured outside of this outer ring. This geometry confines the surface current and allows for measurement of the bulk resistivity even when the conductive surface dominates transport (below 4 K). The results confirm that the bulk of SmB6 is truly insulating down to 2 K. Hall measurements on a number of samples show consistent bulk behavior from 4-40 K, but widely varying behavior among samples above 40 K. This is attributed to a combination of the growth process and purity of the starting material, and the relationship between the high and low temperature behaviors is still being explored. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bulk%20transport" title="bulk transport">bulk transport</a>, <a href="https://publications.waset.org/abstracts/search?q=Hall%20effect" title=" Hall effect"> Hall effect</a>, <a href="https://publications.waset.org/abstracts/search?q=inverted%20resistance" title=" inverted resistance"> inverted resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=Kondo%20insulator" title=" Kondo insulator"> Kondo insulator</a>, <a href="https://publications.waset.org/abstracts/search?q=samarium%20hexaboride" title=" samarium hexaboride"> samarium hexaboride</a>, <a href="https://publications.waset.org/abstracts/search?q=topological%20insulator" title=" topological insulator"> topological insulator</a> </p> <a href="https://publications.waset.org/abstracts/94303/bulk-transport-in-strongly-correlated-topological-insulator-samarium-hexaboride-using-hall-effect-and-inverted-resistance-methods" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/94303.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">160</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/WASET-16th-foundational-anniversary.pdf">WASET 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Search results for: Byungki Cho