Research News

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class="col-md-9 col-md-pull-3"> <div class="newsListDiv"> <div class="contentBox"> <div id="news_8ac672c4936e696f01936e726717003a" class="newsItemDiv "> <h2 class="newsItemTitle"> <a href="https://warwick.ac.uk/fac/sci/physics/news/?newsItem=8ac672c4936e696f01936e726717003a" title="Read more about this news story">New paper published in Physical Review X</a> </h2> <div class="newsItemAbstract"> <p>Dr Marios Hadjimichael has published a paper in Physical Review X titled <a href="https://journals.aps.org/prx/abstract/10.1103/PhysRevX.14.041052" target="_blank" rel="noopener">'Assessing the ubiquity of Bloch domain walls in ferroelectric lead titanate superlattices.'<i class='new-window-link' aria-hidden='true' title='Link opens in a new window'></i><span class='sr-only'>Link opens in a new window</span></a></p> <div style="clear:both;"></div> </div> <div class="newsItemFooter clearfix" data-noindex> <div class="dropup shareButtons"> <button class="btn btn-default btn-sm dropdown-toggle" 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first launch meeting at the University of Warwick in September. Spearheaded by Warwick astrophysicists, the UK & Ireland Discs community has been set up to foster close connections and collaborations between the many researchers working on astrophysical discs. </p> <div style="clear:both;"></div> </div> <div class="newsItemFooter clearfix" data-noindex> <div class="dropup shareButtons"> <button class="btn btn-default btn-sm dropdown-toggle" type="button" data-toggle="dropdown"> <i class="fas fa-share-alt" aria-hidden="true" title="Share this"></i> <span class="sr-only">Share this</span> </button> <ul class="dropdown-menu"> <li><a href="https://www.facebook.com/share.php?u=https%3A%2F%2Fwarwick.ac.uk%2Ffac%2Fsci%2Fphysics%2Fresearch%2Fresearchnews%2F%3FnewsItem%3D8ac672c692f555ff019300c6cdde5209" target="_blank"> <i class="fab fa-facebook-square fa-fw" aria-hidden="true" title="Share on Facebook"></i> <span class="sr-only">Share on Facebook</span> </a></li> <li><a href="http://www.twitter.com/share?text=Warwick%20hosts%20the%20inaugural%20meeting%20of%20the%20newly%20founded%20UK%20and%20Ireland%20Astrophysical%20Discs%20community%20&url=https%3A%2F%2Fwarwick.ac.uk%2Ffac%2Fsci%2Fphysics%2Fresearch%2Fresearchnews%2F%3FnewsItem%3D8ac672c692f555ff019300c6cdde5209" target="_blank"> <i class="fab fa-twitter-square fa-fw" aria-hidden="true" title="Share on X"></i> <span class="sr-only">Share on X</span> </a></li> <li><a href="https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Fwarwick.ac.uk%2Ffac%2Fsci%2Fphysics%2Fresearch%2Fresearchnews%2F%3FnewsItem%3D8ac672c692f555ff019300c6cdde5209" target="_blank"> <i class="fab fa-linkedin fa-fw" aria-hidden="true" title="Share on LinkedIn"></i> <span class="sr-only">Share on LinkedIn</span> </a></li> <li><a href="mailto:?subject=Warwick%20hosts%20the%20inaugural%20meeting%20of%20the%20newly%20founded%20UK%20and%20Ireland%20Astrophysical%20Discs%20community%20&body=https%3A%2F%2Fwarwick.ac.uk%2Ffac%2Fsci%2Fphysics%2Fresearch%2Fresearchnews%2F%3FnewsItem%3D8ac672c692f555ff019300c6cdde5209"> <i class="fas fa-envelope-square fa-fw" aria-hidden="true" title="Share via email"></i> <span class="sr-only">Share via email</span> </a></li> </ul> </div> <span class="publicationDate">Wed 06 Nov 2024, 09:20</span> <span class="newsTags"> <span class="pipe">|</span> Tags: <a title="Show all news from this category" href="/fac/sci/physics/research/researchnews/?tag=announcements"><span class="">announcements</span></a>, <a title="Show all news from this category" href="/fac/sci/physics/research/researchnews/?tag=Faculty%20of%20Science"><span class="">Faculty of Science</span></a>, <a title="Show all news from this category" href="/fac/sci/physics/research/researchnews/?tag=Feature%20News"><span class="">Feature News</span></a>, <a title="Show all news from this category" href="/fac/sci/physics/research/researchnews/?tag=Research"><span class="">Research</span></a> </span> </div> </div> </div> <div class="newsItemDivider"><br></div> <div class="contentBox"> <div id="news_8a1785d79198c8ac0191b512635e1be6" class="newsItemDiv "> <h2 class="newsItemTitle"> <a href="https://doi.org/10.1016/j.physe.2024.116073" title="Read more about this news story">Real-space renormalisation approach to the Chalker-Coddington model revisited: improved statistics</a> </h2> <div class="news-thumbnail"> <a aria-hidden="true" href="https://doi.org/10.1016/j.physe.2024.116073" title="Read more about this news story"> <img class="thumbnail" width="100" height="100" src="//warwick.ac.uk/sitebuilder2/file/fac/sci/physics/news?sbrPage=/fac/sci/physics/news&newsItem=8a1785d79198c8ac0191b512635e1be6" alt=""> </a> </div> <div class="newsItemAbstract"> <p>PhD student Syl Shaw and supervisor Rudo Roemer apply the real-space renormalisation group method to the Chalker–Coddington model of the quantum Hall transition. This approach provides a convenient numerical estimation of the localisation critical exponent, <span class="math"><span class="MathJax_Preview"></span><span class="MathJax_SVG" id="MathJax-Element-3-Frame" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi is="true">&#x3BD;</mi></math>" role="presentation" tabindex="0">谓</span></span><span class="math"></span>. Previous such studies found <span class="math"><span class="MathJax_SVG" id="MathJax-Element-3-Frame" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi is="true">&#x3BD;</mi></math>" role="presentation" tabindex="0"></span></span><span class="math"><span class="MathJax_SVG" id="MathJax-Element-3-Frame" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi is="true">&#x3BD;</mi></math>" role="presentation" tabindex="0">谓</span></span><span class="math"><span class="MathJax_SVG" id="MathJax-Element-3-Frame" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi is="true">&#x3BD;</mi></math>" role="presentation" tabindex="0">=2.39</span></span> which falls considerably short of the current best estimates by transfer matrix (2.593) and exact-diagonalisation studies (2.58). By increasing the amount of data 500 fold they can now measure closer to the critical point and find an improved estimate 2.51. This deviates only 3% from the previous two values and is already better than the 7% accuracy of the classical small-cell renormalisation approach from which their method is adapted.</p> <div style="clear:both;"></div> </div> <div class="newsItemFooter clearfix" data-noindex> <div class="dropup shareButtons"> <button class="btn btn-default btn-sm dropdown-toggle" type="button" data-toggle="dropdown"> <i class="fas fa-share-alt" aria-hidden="true" title="Share this"></i> <span class="sr-only">Share this</span> </button> <ul class="dropdown-menu"> <li><a href="https://www.facebook.com/share.php?u=https%3A%2F%2Fwarwick.ac.uk%2Ffac%2Fsci%2Fphysics%2Fresearch%2Fresearchnews%2F%3FnewsItem%3D8a1785d79198c8ac0191b512635e1be6" target="_blank"> <i class="fab fa-facebook-square fa-fw" aria-hidden="true" title="Share on Facebook"></i> <span class="sr-only">Share on Facebook</span> </a></li> <li><a href="http://www.twitter.com/share?text=Real-space%20renormalisation%20approach%20to%20the%20Chalker-Coddington%20model%20revisited%3A%20improved%20statistics&url=https%3A%2F%2Fwarwick.ac.uk%2Ffac%2Fsci%2Fphysics%2Fresearch%2Fresearchnews%2F%3FnewsItem%3D8a1785d79198c8ac0191b512635e1be6" target="_blank"> <i class="fab fa-twitter-square fa-fw" aria-hidden="true" title="Share on X"></i> <span class="sr-only">Share on X</span> </a></li> <li><a href="https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Fwarwick.ac.uk%2Ffac%2Fsci%2Fphysics%2Fresearch%2Fresearchnews%2F%3FnewsItem%3D8a1785d79198c8ac0191b512635e1be6" target="_blank"> <i class="fab fa-linkedin fa-fw" aria-hidden="true" title="Share on LinkedIn"></i> <span class="sr-only">Share on LinkedIn</span> </a></li> <li><a href="mailto:?subject=Real-space%20renormalisation%20approach%20to%20the%20Chalker-Coddington%20model%20revisited%3A%20improved%20statistics&body=https%3A%2F%2Fwarwick.ac.uk%2Ffac%2Fsci%2Fphysics%2Fresearch%2Fresearchnews%2F%3FnewsItem%3D8a1785d79198c8ac0191b512635e1be6"> <i class="fas fa-envelope-square fa-fw" aria-hidden="true" title="Share via email"></i> <span class="sr-only">Share via email</span> </a></li> </ul> </div> <span class="publicationDate">Sat 14 Sep 2024, 00:00</span> <span class="newsTags"> <span class="pipe">|</span> Tags: <a title="Show all news from this category" href="/fac/sci/physics/research/researchnews/?tag=Postgraduates"><span class="">Postgraduates</span></a>, <a title="Show all news from this category" href="/fac/sci/physics/research/researchnews/?tag=Research"><span class="">Research</span></a> </span> </div> </div> </div> <div class="newsItemDivider"><br></div> <div class="contentBox"> <div id="news_8a17841a9198cb160191b50bfd696063" class="newsItemDiv "> <h2 class="newsItemTitle"> <a href="https://doi.org/10.1140/epjb/s10051-024-00745-w" title="Read more about this news story">Quantum engineering for compactly localized states in disordered Lieb lattices</a> </h2> <div class="news-thumbnail"> <a aria-hidden="true" href="https://doi.org/10.1140/epjb/s10051-024-00745-w" title="Read more about this news story"> <img class="thumbnail" width="100" height="100" src="//warwick.ac.uk/sitebuilder2/file/fac/sci/physics/news?sbrPage=/fac/sci/physics/news&newsItem=8a17841a9198cb160191b50bfd696063" alt=""> </a> </div> <div class="newsItemAbstract"> <p>Blending ordering within an uncorrelated disorder potential in families of 3D Lieb lattices preserves the macroscopic degeneracy of compact localized states and yields unconventional combinations of localized and delocalized phases—as shown in Liu et al. (Phys Rev B 106:214204, 2022). Danieli, Liu and Roemer proceed to reintroduce translation invariance in the system by further ordering the disorder, and discuss the spectral structure and eigenstates features of the resulting perturbed lattices. This strategy, herewith implemented in the 3D Lieb lattice, highlights order restoration as experimental pathway to engineer spectral and states features in disordered lattice structures in the pursuit of quantum storage and memory applications.</p> <div style="clear:both;"></div> </div> <div class="newsItemFooter clearfix" data-noindex> <div class="dropup shareButtons"> <button class="btn btn-default btn-sm dropdown-toggle" type="button" data-toggle="dropdown"> <i class="fas fa-share-alt" aria-hidden="true" title="Share this"></i> <span class="sr-only">Share this</span> </button> <ul class="dropdown-menu"> <li><a href="https://www.facebook.com/share.php?u=https%3A%2F%2Fwarwick.ac.uk%2Ffac%2Fsci%2Fphysics%2Fresearch%2Fresearchnews%2F%3FnewsItem%3D8a17841a9198cb160191b50bfd696063" target="_blank"> <i class="fab fa-facebook-square fa-fw" aria-hidden="true" title="Share on Facebook"></i> <span class="sr-only">Share on Facebook</span> </a></li> <li><a href="http://www.twitter.com/share?text=Quantum%20engineering%20for%20compactly%20localized%20states%20in%20disordered%20Lieb%20lattices&url=https%3A%2F%2Fwarwick.ac.uk%2Ffac%2Fsci%2Fphysics%2Fresearch%2Fresearchnews%2F%3FnewsItem%3D8a17841a9198cb160191b50bfd696063" target="_blank"> <i class="fab fa-twitter-square fa-fw" aria-hidden="true" title="Share on X"></i> <span class="sr-only">Share on X</span> </a></li> <li><a href="https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Fwarwick.ac.uk%2Ffac%2Fsci%2Fphysics%2Fresearch%2Fresearchnews%2F%3FnewsItem%3D8a17841a9198cb160191b50bfd696063" target="_blank"> <i class="fab fa-linkedin fa-fw" aria-hidden="true" title="Share on LinkedIn"></i> <span class="sr-only">Share on LinkedIn</span> </a></li> <li><a href="mailto:?subject=Quantum%20engineering%20for%20compactly%20localized%20states%20in%20disordered%20Lieb%20lattices&body=https%3A%2F%2Fwarwick.ac.uk%2Ffac%2Fsci%2Fphysics%2Fresearch%2Fresearchnews%2F%3FnewsItem%3D8a17841a9198cb160191b50bfd696063"> <i class="fas fa-envelope-square fa-fw" aria-hidden="true" title="Share via email"></i> <span class="sr-only">Share via email</span> </a></li> </ul> </div> <span class="publicationDate">Sat 07 Sep 2024, 00:00</span> <span class="newsTags"> <span class="pipe">|</span> Tags: <a title="Show all news from this category" href="/fac/sci/physics/research/researchnews/?tag=Research"><span class="">Research</span></a> </span> </div> </div> </div> <div class="newsItemDivider"><br></div> <div class="contentBox"> <div id="news_8a1785d79179dd3901918f55888b0f33" class="newsItemDiv "> <h2 class="newsItemTitle"> <a href="https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.6.033221" title="Read more about this news story">Maximal Anderson localization and suppression of surface plasmons in two-dimensional random Au networks</a> </h2> <div class="news-thumbnail"> <a aria-hidden="true" href="https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.6.033221" title="Read more about this news story"> <img class="thumbnail" width="100" height="100" src="//warwick.ac.uk/sitebuilder2/file/fac/sci/physics/news?sbrPage=/fac/sci/physics/news&newsItem=8a1785d79179dd3901918f55888b0f33" alt=""> </a> </div> <div class="newsItemAbstract"> <p>Two-dimensional random metal networks possess unique electrical and optical properties, such as almost total optical transparency and low sheet resistance. These properties are closely related to their disordered structure. In this work, Prof. R枚mer and colleagues from Dresden, Germany, give a detailed experimental and theoretical investigation of these plasmonic properties, revealing Anderson (disorder-driven) localized surface plasmon resonance. This could support the development of design rules for the underlying conduction networks, e.g., in order to further optimize design transparency for envisaged future applications as transparent electrodes.</p> <div style="clear:both;"></div> </div> <div class="newsItemFooter clearfix" data-noindex> <div class="dropup shareButtons"> <button class="btn btn-default btn-sm dropdown-toggle" type="button" data-toggle="dropdown"> <i class="fas fa-share-alt" aria-hidden="true" title="Share this"></i> <span class="sr-only">Share this</span> </button> <ul class="dropdown-menu"> <li><a href="https://www.facebook.com/share.php?u=https%3A%2F%2Fwarwick.ac.uk%2Ffac%2Fsci%2Fphysics%2Fresearch%2Fresearchnews%2F%3FnewsItem%3D8a1785d79179dd3901918f55888b0f33" target="_blank"> <i class="fab fa-facebook-square fa-fw" aria-hidden="true" title="Share on Facebook"></i> <span class="sr-only">Share on Facebook</span> </a></li> <li><a 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