Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > When a band falls flat: Searching for flatness in materials: International collaboration, led by DIPC and Princeton, creates a catalogue of materials that could impact quantum technologies

An artistic representation of band dispersions for a given material. Black ribbons represent different bands, while the vertical axis is kinetic energy. At the center we have two flat bands originating from the unique kagome structure of the material.

CREDIT
© MPI CPfS
An artistic representation of band dispersions for a given material. Black ribbons represent different bands, while the vertical axis is kinetic energy. At the center we have two flat bands originating from the unique kagome structure of the material. CREDIT © MPI CPfS

Abstract:
Finding the right ingredients to create materials with exotic quantum properties has been a chimera for experimental scientists, due to the endless possible combinations of different elements to be synthesized.

When a band falls flat: Searching for flatness in materials: International collaboration, led by DIPC and Princeton, creates a catalogue of materials that could impact quantum technologies

Dresden, Germany | Posted on April 1st, 2022

From now on, the creation of such materials could be less blindfolded thanks to an international collaboration led by Andrei Bernevig, Ikerbasque visiting professor at Donostia International Physics Center (DIPC) and professor at Princeton University, and Nicolas Regnault, from Princeton University and the Ecole Normale Supérieure Paris, CNRS, including the participation of Luis Elcoro from the University of the Basque Country (UPV/EHU).

The team conducted a systematic search for potential candidates in a massive haystack of 55,000 materials. The elimination process started with the identification of the so-called flat band materials, that is, electronic states with constant kinetic energy. Therefore, in a flat band the behavior of the electrons is governed mostly by the interactions with other electrons. However, researchers realized that flatness is not the only requirement, because when electrons are too tightly bound to the atoms, even in a flat band, they are not able to move around and create interesting states of matter. “You want electrons to see each other, something you can achieve by making sure they are extended in space. That’s exactly what topological bands bring to the table,” says Nicolas Regnault.

Topology plays a crucial role in modern condensed matter physics as suggested by the three Nobel prizes in 1985, 1997 and 2016. It enforces some quantum wave functions to be extended making them insensitive to local perturbation such as impurities. It might impose some physical properties, such as a resistance, to be quantized or lead to perfectly conducting surface states.

Fortunately, the team has been at the forefront of characterizing topological properties of bands through their approach known as “topological quantum chemistry”, thereby giving them a large database of materials, as well as the theoretical tools to look for topological flat bands.

By employing tools ranging from analytical methods to brute-force searches, the team found all the flat band materials currently known in nature. This catalogue of flat band materials is available online https://www.topologicalquantumchemistry.fr/flatbands with its own search engine. “The community can now look for flat topological bands in materials. We have found, out of 55,000 materials, about 700 exhibiting what could potentially be interesting flat bands,” says Yuanfeng Xu, from Princeton University and the Max Planck Institute of Microstructure Physics, one of the two lead authors of the study. "We made sure that the materials we promote are promising candidates for chemical synthesis," emphasizes Leslie Schoop from the Princeton chemistry department. The team has further classified the topological properties of these bands, uncovering what type of delocalized electrons they host.

Now that this large catalogue is completed, the team will start growing the predicted materials to experimentally discover the potential myriad of new interacting states. “Now that we know where to look, we need to grow these materials,” says Claudia Felser from the Max Planck Institute for Chemical Physics of Solids. “We have a dream team of experimentalists working with us. They are eager to measure the physical properties of these candidates and see which exciting quantum phenomena will emerge.”

The catalogue of flat bands, published in Nature on 30 March 2022, represents the end of years of research by the team. “Many people, and many grant institutions and universities to which we presented the project said this was too hard and could never be done. It took us some years, but we did it,” said Andrei Bernevig.

The publication of this catalogue will not only reduce the serendipity in the search for new materials, but it will allow for large searches of compounds with exotic properties, such as magnetism and superconductivity, with applications in memory devices or in long-range dissipationless transport of power.

Funding

Funding for the project was primarily provided by an advanced grant of the European Research Council (ERC) at DIPC (SUPERFLAT, ERC-2020-ADG).

####

For more information, please click here

Contacts:
Ingrid Rothe
Max Planck Institute for Chemical Physics of Solids

Office: +49 351-46463001
Valentina Rodríguez
Donostia International Physics Center (DIPC)

Office: +34 638 877 716
Expert Contacts

Claudia Felser
Max Planck Institute for Chemical Physics of Solids

B. Andrei Bernevig
Princeton University and Donostia International Physics Center (DIPC)

Nicolas Regnault
Princeton University and Ecole Normale Supérieure Paris, CNRS

Yuanfeng Xu
Max Planck Institute of Microstructure Physics and Princeton University

Copyright © Max Planck Institute for Chemical Physics of Solids

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

ARTICLE TITLE

Related News Press

News and information

Robot nose that can “smell” disease on your breath: Scientists develop diagnostic device for identifying compounds unique to particular diseases July 1st, 2022

Efficiently processing high-quality periodic nanostructures with ultrafast laser July 1st, 2022

Photonic synapses with low power consumption and high sensitivity are expected to integrate sensing-memory-preprocessing capabilities July 1st, 2022

New protocol for assessing the safety of nanomaterials July 1st, 2022

Govt.-Legislation/Regulation/Funding/Policy

Solving the solar energy storage problem with rechargeable batteries that can convert and store energy at once June 24th, 2022

Boron nitride nanotube fibers get real: Rice lab creates first heat-tolerant, stable fibers from wet-spinning process June 24th, 2022

UBCO researchers change the game when it comes to activity tracking: Flexible, highly sensitive motion device created by extrusion printing June 17th, 2022

University of Illinois Chicago joins Brookhaven Lab's Quantum Center June 10th, 2022

Possible Futures

Robot nose that can “smell” disease on your breath: Scientists develop diagnostic device for identifying compounds unique to particular diseases July 1st, 2022

Efficiently processing high-quality periodic nanostructures with ultrafast laser July 1st, 2022

Photonic synapses with low power consumption and high sensitivity are expected to integrate sensing-memory-preprocessing capabilities July 1st, 2022

New protocol for assessing the safety of nanomaterials July 1st, 2022

Discoveries

Robot nose that can “smell” disease on your breath: Scientists develop diagnostic device for identifying compounds unique to particular diseases July 1st, 2022

Efficiently processing high-quality periodic nanostructures with ultrafast laser July 1st, 2022

Photonic synapses with low power consumption and high sensitivity are expected to integrate sensing-memory-preprocessing capabilities July 1st, 2022

New protocol for assessing the safety of nanomaterials July 1st, 2022

Materials/Metamaterials

New protocol for assessing the safety of nanomaterials July 1st, 2022

Nanotubes: a promising solution for advanced rubber cables with 60% less conductive filler June 1st, 2022

New route to build materials out of tiny particles May 27th, 2022

A one-stop shop for quantum sensing materials May 27th, 2022

Announcements

Robot nose that can “smell” disease on your breath: Scientists develop diagnostic device for identifying compounds unique to particular diseases July 1st, 2022

Efficiently processing high-quality periodic nanostructures with ultrafast laser July 1st, 2022

Photonic synapses with low power consumption and high sensitivity are expected to integrate sensing-memory-preprocessing capabilities July 1st, 2022

New protocol for assessing the safety of nanomaterials July 1st, 2022

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Robot nose that can “smell” disease on your breath: Scientists develop diagnostic device for identifying compounds unique to particular diseases July 1st, 2022

Efficiently processing high-quality periodic nanostructures with ultrafast laser July 1st, 2022

Photonic synapses with low power consumption and high sensitivity are expected to integrate sensing-memory-preprocessing capabilities July 1st, 2022

New protocol for assessing the safety of nanomaterials July 1st, 2022

Research partnerships

New technology helps reveal inner workings of human genome June 24th, 2022

Boron nitride nanotube fibers get real: Rice lab creates first heat-tolerant, stable fibers from wet-spinning process June 24th, 2022

Undergrads begin summer quantum research with support from Moore Foundation, Chicago region universities, national labs: Inaugural cohort of students join quantum research labs around the Midwest, planting the seeds for a diverse and inclusive quantum workforce June 17th, 2022

CEA & Partners Present ‘Powerful Step Towards Industrialization’ Of Linear Si Quantum Dot Arrays Using FDSOI Material at VLSI Symposium: Invited paper reports 3-step characterization chain and resulting methodologies and metrics that accelerate learning, provide data on device pe June 17th, 2022

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project