Ana Sayfa Kuantum Gazetesi Kenarlarda kayıpsız iletim

Kenarlarda kayıpsız iletim

265
46

Tungsten (IV) ditellürid (WTe2) yarı metalinin atomik ince tabakaları, kristal kenarlarındaki dar, tek boyutlu kanallar boyunca elektrik akımını kayıpsız bir şekilde iletir. Bu nedenle WTe2 ikinci dereceden bir topolojik yalıtkandır. Bu davranışın deneysel kanıtı elde edilerek, fizikçiler topolojik süper iletkenlik için aday malzeme havuzunu genişletmeyi başardılar.

Topolojik izolatörler, geleceğin elektroniğinde potansiyel olarak süper iletken olarak kullanılabildikleri için önemli bir araştırma alanı olarak öne çıkmaktadır. Bu tür malzemeler iç kısmında yalıtkanlar gibi davranırken, yüzeylerinde metalik özelliklere sahiptir ve elektrik iletirler. Topolojik bir yalıtkanın üç boyutlu bir kristalinin içerisinden akım akmazken, yüzeyinde elektrik akımı iletilebilir. Kuantum mekaniği nedeniyle, yüzeydeki iletkenlik neredeyse kayıpsızdır – elektrik, ısı üretimi olmadan uzun mesafelerde gerçekleştirilebilme imkanı bulundurur.

Deney düzeneğinin şematik diyagramı: İki kontak arasında (gümüş olarak) atomik olarak ince bir WTe2 tabakası bulunur. Akım, malzemeden sadece dış kenarlardaki çok dar kanallarda akar. Kaynak: Basel Üniversitesi Fizik Bölümü

Bu malzemelere ek olarak, ikinci dereceden topolojik izolatörler olarak bilinen başka bir sınıf vardır. Bu üç boyutlu kristaller, yalnızca belirli kristal kenarları boyunca uzanan iletken, tek boyutlu kanallara sahiptir. Bu tür malzemeler özellikle kuantum hesaplamadaki potansiyel uygulamalar için oldukça uygundur.

Teorik öngörü

Bu deney üzerinde çalışan bilim insanları, yarı metal bizmutun ikinci dereceden bir topolojik materyalin bazı özelliklerini sergilediğini varsaymaktadır. Dahası, araştırmacılar -teorik olarak- başka bir yarı metal, tungsten ditellürid (WTe2) atomik olarak ince tabakalarının, ikinci dereceden topolojik izolatörler gibi davranacağını – diğer bir deyişle, kenarlarda kayıpsız bir şekilde elektrik yapacaklarını tahmin ettiler.

Basel Üniversitesi Fizik Bölümü’nden Profesör Christian Schönenberger ve Basel Üniversitesi İsviçre Nanobilim Enstitüsü tarafından yönetilen ekip bir ila 20 katmandan oluşan küçük tungsten ditellürid kristallerini analiz etti. Malzemenin elektriksel özelliklerini belirlemek için manyetik alan uygulamadan önce süper iletken kontaklar yapıştırdılar. Malzeme oksidasyona karşı hassas olduğundan, araştırmacılar özel bir düşük oksijen kutusunda çalıştılar ve tungsten ditellüridi havada stabil olan başka bir kristalle kapladılar.

Karakteristik salınımlar

Ana kristal içindeki akım akışını analiz ederek, bilim insanlar yavaş yavaş çürüyen salınımlar tespit ettiler.

Dr. Artem Kononov ve Georg H. Endress bu tespitlerini “Tekdüze bir akım dağılımı hızla bozulan salınımlara yol açarken, son derece iletken kenar durumları, ölçtüğümüz gibi güçlü salınımlı, yavaş yavaş çürüyen akımlar üretir.” şeklinde açıkladılar. Buna göre sonuçlar için olası tek açıklama, akımın büyük bir kısmının dar kenarlar boyunca akmasıdır.

Bu gözlemler ise, tungsten ditellüridin daha yüksek dereceli bir topolojik materyal olduğu teorik tahminlerini desteklemektedir. Teori ve deneyin uyumlu ilerlemesinin bir sonucu olan bu gelişme malzeme bilimi ve kuantum hesaplamanın geleceği açısından önemli bir gelişme olarak düşünülmektedir.

Kaynakça

  1. Artem Kononov, Gulibusitan Abulizi, Kejian Qu, Jiaqiang Yan, David Mandrus, Kenji Watanabe, Takashi Taniguchi, and Christian Schönenberger
    One-dimensional edge transport in few-layer WTe2
    Nano Letters (2020), doi: 10.1021/acs.nanolett.0c00658
  2. Lossless conduction at the edges by University of Basel
Bu içeriği paylaş
Önceki İçerikDaha hızlı, daha küçük işlemciler için ileriye giden yol
Sonraki İçerikQuantum JavaScript (Q.js) Sürükle/Bırak Devre Editörü
Avatar
QTurkey, Türkiye’deki kuantum teknolojileriyle ilgili faaliyetler için bir iletişim ve işbirliği ağıdır. “Kuantum Programlamaya Giriş” çalıştayları düzenliyor, ilgili konulardaki ilgili öğrenciler için çalışma grupları ve toplantılar organize ediyoruz ve ülke düzeyinde kuantum meraklıları için bir buluşma alanı oluşturabilme amacıyla hareket ediyoruz.

46 YORUMLAR

  1. I’m really impressed with your writing skills and also with the layout on your weblog. Is this a paid theme or did you modify it yourself? Anyway keep up the nice quality writing, it is rare to see a great blog like this one today..

  2. My developer is trying to persuade me to move to .net from PHP. I have always disliked the idea because of the expenses. But he’s tryiong none the less. I’ve been using Movable-type on a variety of websites for about a year and am worried about switching to another platform. I have heard good things about blogengine.net. Is there a way I can import all my wordpress content into it? Any kind of help would be really appreciated!

  3. In accordance with my research, after a in foreclosure home is marketed at a bidding, it is common for the borrower to still have a remaining unpaid debt on the loan. There are many loan providers who try to have all fees and liens repaid by the next buyer. On the other hand, depending on particular programs, laws, and state laws there may be a number of loans that aren’t easily resolved through the shift of personal loans. Therefore, the duty still remains on the borrower that has had his or her property in foreclosure. Thank you sharing your opinions on this website.

  4. Thanks for this excellent article. One more thing to mention is that nearly all digital cameras can come equipped with the zoom lens so that more or less of that scene for being included by ‘zooming’ in and out. These changes in {focus|focusing|concentration|target|the a**** length usually are reflected inside viewfinder and on huge display screen right on the back of this camera.

  5. Thanks for giving your ideas. Another thing is that scholars have a selection between federal student loan as well as a private education loan where it can be easier to go with student loan consolidation than through the federal student loan.

  6. I have been browsing on-line more than three hours as of late, yet I never found any fascinating article like yours. It is beautiful value sufficient for me. In my opinion, if all site owners and bloggers made just right content material as you did, the internet shall be a lot more useful than ever before.

  7. Thanks for your content. One other thing is that if you are selling your property alone, one of the difficulties you need to be conscious of upfront is how to deal with home inspection reports. As a FSBO vendor, the key about successfully transferring your property as well as saving money with real estate agent commission rates is know-how. The more you already know, the simpler your home sales effort will likely be. One area exactly where this is particularly important is inspection reports.

  8. My developer is trying to convince me to move to .net from PHP. I have always disliked the idea because of the costs. But he’s tryiong none the less. I’ve been using Movable-type on a variety of websites for about a year and am concerned about switching to another platform. I have heard fantastic things about blogengine.net. Is there a way I can import all my wordpress posts into it? Any help would be really appreciated!

  9. Do you have a spam issue on this site; I also am a blogger, and I was wanting to know your situation; we have developed some nice procedures and we are looking to trade methods with other folks, please shoot me an e-mail if interested.

  10. I have learned some new items from your site about computers. Another thing I’ve always believed is that laptop computers have become something that each home must have for many people reasons. They provide convenient ways to organize homes, pay bills, search for information, study, listen to music and in many cases watch shows. An innovative way to complete most of these tasks is with a laptop. These desktops are mobile, small, robust and portable.

  11. In accordance with my observation, after a in foreclosure process home is offered at a sale, it is common for that borrower to be able to still have any remaining balance on the personal loan. There are many loan companies who aim to have all expenses and liens paid back by the following buyer. Nonetheless, depending on particular programs, legislation, and state laws there may be many loans which are not easily resolved through the shift of financial products. Therefore, the responsibility still lies on the customer that has obtained his or her property in foreclosure process. Thanks for sharing your thinking on this blog.

  12. Howdy! Quick question that’s totally off topic. Do you know how to make your site mobile friendly? My website looks weird when browsing from my iphone. I’m trying to find a theme or plugin that might be able to fix this issue. If you have any recommendations, please share. Many thanks!

  13. Awesome blog! Is your theme custom made or did you download it from somewhere? A theme like yours with a few simple adjustements would really make my blog jump out. Please let me know where you got your design. Appreciate it

  14. This article is absolutely incredible! The author has done a tremendous job of delivering the information in an captivating and educational manner. I can’t thank him enough for sharing such valuable insights that have certainly enlightened my knowledge in this subject area. Bravo to him for crafting such a masterpiece!

  15. One thing is that one of the most popular incentives for applying your card is a cash-back or maybe rebate offer. Generally, you’ll have access to 1-5 back for various acquisitions. Depending on the cards, you may get 1 back on most buying, and 5 in return on purchases made in convenience stores, gasoline stations, grocery stores and also ‘member merchants’.

  16. I have discovered that costs for on-line degree experts tend to be a fantastic value. For example a full 4-year college Degree in Communication from The University of Phoenix Online consists of 60 credits at $515/credit or $30,900. Also American Intercontinental University Online gives a Bachelors of Business Administration with a whole program feature of 180 units and a cost of $30,560. Online learning has made obtaining your certification so much easier because you can earn the degree in the comfort of your dwelling place and when you finish from work. Thanks for all the other tips I have certainly learned through your web site.

  17. Great beat ! I wish to apprentice while you amend your web site, how could i subscribe for a blog web site? The account aided me a acceptable deal. I had been a little bit acquainted of this your broadcast offered bright clear concept

  18. Throughout the awesome scheme of things you actually secure an A+ just for effort. Where you actually confused everybody ended up being in your details. You know, as the maxim goes, the devil is in the details… And that could not be much more correct here. Having said that, allow me tell you what exactly did do the job. The authoring is certainly extremely engaging and that is most likely the reason why I am taking the effort in order to comment. I do not make it a regular habit of doing that. 2nd, although I can see a jumps in logic you come up with, I am not really sure of how you appear to connect the points which inturn make the conclusion. For now I will subscribe to your position but hope in the foreseeable future you link the facts better.

  19. Fantastic website you have here but I was curious about if you knew of any user discussion forums that cover the same topics discussed in this article? I’d really like to be a part of community where I can get responses from other experienced individuals that share the same interest. If you have any recommendations, please let me know. Appreciate it!

  20. I have observed that of all kinds of insurance, medical insurance is the most questionable because of the issue between the insurance plan company’s necessity to remain making money and the customer’s need to have insurance coverage. Insurance companies’ profits on health and fitness plans are extremely low, as a result some corporations struggle to make money. Thanks for the ideas you write about through this website.

  21. Your dedication to sharing knowledge is unmistakable, and your writing style is captivating. Your articles are a pleasure to read, and I consistently come away feeling enriched. Thank you for being a dependable source of inspiration and information.

  22. I have seen that sensible real estate agents everywhere are starting to warm up to FSBO ***********. They are knowing that it’s more than simply placing a sign post in the front property. It’s really in relation to building relationships with these traders who someday will become consumers. So, once you give your time and energy to aiding these dealers go it alone : the “Law of Reciprocity” kicks in. Great blog post.

  23. I must commend your talent for simplifying complex topics. Your ability to convey intricate ideas in such a relatable way is admirable. You’ve made learning enjoyable and accessible for many, and I appreciate that.

  24. Hi there! I know this is kinda off topic however , I’d figured I’d ask. Would you be interested in trading links or maybe guest authoring a blog article or vice-versa? My website discusses a lot of the same topics as yours and I think we could greatly benefit from each other. If you might be interested feel free to shoot me an email. I look forward to hearing from you! Fantastic blog by the way!

  25. I have come to understand that fees for on-line degree experts tend to be an awesome value. Like a full Bachelor’s Degree in Communication with the University of Phoenix Online consists of 60 credits at $515/credit or $30,900. Also American Intercontinental University Online comes with a Bachelors of Business Administration with a total program feature of 180 units and a cost of $30,560. Online studying has made getting the certification been so detailed more than before because you may earn the degree in the comfort of your home and when you finish from work. Thanks for all other tips I have really learned through the web-site.

  26. Your unique approach to addressing challenging subjects is like a breath of fresh air. Your articles stand out with their clarity and grace, making them a pure joy to read. Your blog has now become my go-to source for insightful content.

  27. Your passion and dedication to your craft radiate through every article. Your positive energy is infectious, and it’s evident that you genuinely care about your readers’ experience. Your blog brightens my day!

  28. Hey there just wanted to give you a quick heads up. The words in your post seem to be running off the screen in Firefox. I’m not sure if this is a format issue or something to do with browser compatibility but I thought I’d post to let you know. The design look great though! Hope you get the issue solved soon. Kudos

  29. I must commend your talent for simplifying complex topics. Your ability to convey intricate ideas in such a relatable way is admirable. You’ve made learning enjoyable and accessible for many, and I appreciate that.

  30. I simply wanted to convey how much I’ve gleaned from this article. Your meticulous research and clear explanations make the information accessible to all readers. It’s abundantly clear that you’re committed to providing valuable content.

  31. I couldn’t agree more with the insightful points you’ve articulated in this article. Your profound knowledge on the subject is evident, and your unique perspective adds an invaluable dimension to the discourse. This is a must-read for anyone interested in this topic.

CEVAP VER

Lütfen yorumunuzu giriniz!
Lütfen isminizi buraya giriniz