Results 51 to 60 of about 33,751 (272)

Strain-induced partially flat band, helical snake states, and interface superconductivity in topological crystalline insulators [PDF]

, 2014
Topological crystalline insulators in IV-VI compounds host novel topological surface states consisting of multi-valley massless Dirac fermions at low energy.
AY Sipatov, B Roy, C Fang, D Agassi, DB Chklovskii, Evelyn Tang, F Guinea, G Springholz, H Weng, J Liu, J Liu, J Pereiro, JE Moore, JL Mañes, K Murase, L Fu, L Fu, Liang Fu, LS Palatnik, M Kargarian, M Levin, M Serbyn, MJ Weber, MZ Hasan, N Levy, NB Kopnin, NY Fogel, NY Fogel, NY Fogel, OA Mironov, OI Yuzephovich, P Barone, P Chaikin, P Dziawa, P Ghaemi, R Yoshimi, RSK Mong, SY Xu, TH Hsieh, VA Khodel, VM Pereira, W Zhang, XL Qi, Y Okada, Y Tanaka, Y Tanaka   +45 more
core   +2 more sources

From Single Atoms to Nanoparticles: Pathways Toward Efficient and Durable Pt/TiO2 Photocatalysts

Advanced Functional Materials, EarlyView.
Platinum single atoms on TiO2 nanosheets evolve into clusters and nanoparticles under ethanol photoreforming and thermal treatments. By controlling deposition and post‐treatments, particle size and location on specific facets are modulated. The study reveals how stability pathways determine efficiency, guiding the design of more durable photocatalysts.
Juan José Delgado, Enqi Bu, Yaning Han, Carlos López‐Cartes, Mónica Calatayud, Huiyan Pan, Xiaowei Chen   +6 more
wiley   +1 more source

Statistical data analysis methods in Brillouin spectroscopy: Tutorial

APL Photonics
The non-contact and label-free nature of Brillouin microscopy, a type of optical elastography, is contributing to the growing popularity of this technology worldwide for applications in fundamental mechanobiology and biomedical diagnostics.
Christopher G. Poulton, Hadi Mahmodi, Matthew D. Arnold, Luke McAlary, Lezanne Ooi, Irina Kabakova   +5 more
doaj   +1 more source

Spectral Phasor Analysis for Brillouin Microspectroscopy

Frontiers in Physics, 2019
Brillouin Light Scattering (BLS) spectroscopy allows for the all-optical measurement of the hypersonic velocities in a sample, from which one can extract high-frequency elastic moduli. Recent advances in high resolution optical imaging spectrometers have
Kareem Elsayad
doaj   +1 more source

Phonon dispersion curves of two-dimensional colloidal crystals: on the wavelength dependence of friction

, 2008
Digital video-microscopy measurements are reported of both elastic bandstructures and overdamped phonon decay times in two-dimensional colloidal crystals.
Baumgartl, Joerg, Bechinger, Clemens, Dietrich, Julian, Dobnikar, Jure, von Gruenberg, Hans Hennig   +4 more
core   +1 more source

Two Distinct Phases of Bilayer Graphene Films on Ru(0001) [PDF]

, 2012
By combining angle-resolved photoemission spectroscopy and scanning tunneling microscopy we reveal the structural and electronic properties of multilayer graphene on Ru(0001). We prove that large ethylene exposure allows to synthesize two distinct phases
Brune, Harald, Calleja, Fabian, Carbone, Carlo, Dubout, Quentin, Frantzeskakis, Emmanouil, Fujii, Jun, Grioni, Marco, Lehnert, Anne, Moras, Paolo, Natterer, Fabian Donat, Pacilé, Daniela, Papagno, Marco, Pons, Stéphane, Rusponi, Stefano, Sheverdyaeva, Polina Makarovna, Topwal, Dinesh, Vobornik, Ivana   +16 more
core   +3 more sources

Photoconductivity‐Driven Quantum Efficiency Gain in Inorganic Ruddlesden‐Popper Layered Cs2PbBr2I2 Perovskite Photodetector for Visible Light Detection

Advanced Functional Materials, EarlyView.
Rational halogen mixing strategy was employed to shift the bandgap of Cs2PbBr2I2 from ultraviolet to visible region, enabling first realization of a visible‐light photodetector with this 2D layered Ruddlesden‐Popper perovskite material. Under illumination, light‐induced internal field forms and drives trap‐mediated persistent photoconductivity ...
Md Fahim Al Fattah, Asif Abdullah Khan, Saikiran Khamgaonkar, Majid Haji Bagheri, Danyah Khan, Md Rasidul Islam, Mahmoud Almadoun, Aixi Pan, Alexander Li, Marwa Abd‐Ellah, Vivek Maheshwari, Dayan Ban   +11 more
wiley   +1 more source

Room temperature chiral magnetic skyrmion in ultrathin magnetic nanostructures

, 2016
Magnetic skyrmions are chiral spin structures with a whirling configuration. Their topological properties, nanometer size and the fact that they can be moved by small current densities have opened a new paradigm for the manipulation of magnetisation at ...
A Bogdanov, A Bogdanov, A Fert, A Kubetzka, A Sonntag, A Thiaville, A Vansteenkiste, AA Stashkevich, Alessandro Sala, AN Bogdanov, Andrea Locatelli, Andrey Stashkevich, C Moutafis, C Moutafis, C Pappas, Dayane de Souza Chaves, F Büttner, F Freimuth, F Jonietz, G Chen, G Chen, Gilles Gaudin, H Yang, H-B Braun, H-B Braun, H-B Braun, Hongxin Yang, HT Nembach, IE Dzyaloshinskii, IM Miron, IM Miron, Ioan Mihai Miron, J Iwasaki, J Sampaio, J Slonczewski, J-P Tetienne, Jan Vogel, K Di, K Garello, K Guslienko, K Shibata, L Aballe, LD Buda, Liliana D. Buda-Prejbeanu, Lucia Aballe, M Belmeguenai, M Hehn, Mairbek Chshiev, Michael Foerster, MJ Donahue, Mohamed Belmeguenai, N Nagaosa, N Romming, N Romming, NS Kiselev, Olivier Boulle, Olivier Klein, PJ Metaxas, R Tomasello, S Emori, S Heinze, S Monso, S Mühlbauer, S Pizzini, S Rohart, Salim Mourad Chérif, Stefania Pizzini, Stéphane Auffret, T Moriya, T Schulz, Tevfik Onur Menteş, TO Menteş, UK Rößler, W Jiang, W Koshibae, X Zhang, X Zhang, XZ Yu, XZ Yu, XZ Yu, XZ Yu, Y Zhou, Yves Roussigné   +82 more
core   +3 more sources

Intercalated Rare-Earth Metals under Graphene on SiC [PDF]

, 2018
Intercalation of rare earth metals ($RE$ = Eu, Dy, and Gd) is achieved by depositing the $RE$ metal on graphene that is grown on silicon-carbide (SiC) and by subsequent annealing at high temperatures to promote intercalation.
Anderson, Nathaniel A., Hupalo, Myron, Keavney, David, Tringides, Michael, Vaknin, David   +4 more
core   +4 more sources

Lithium Intercalation in the Anisotropic Van Der Waals Semiconductor CrSBr

Advanced Functional Materials, EarlyView.
We report the lithium intercalation in the layered van der Waals crystal CrSBr, revealing strongly anisotropic ion‐migration dynamics. Optical and electrical characterization of exfoliated CrSBr shows lithium diffusion coefficients that differ by more than an order of magnitude along a‐ and b‐directions, consistent with molecular dynamics simulations ...
Kseniia Mosina, Aljoscha Söll, Jiří Šturala, Martin Veselý, Petr Levinsky, Ondřej Kaman, Florian Dirnberger, Giuliana Materzanini, Nicola Marzari, Gian‐Marco Rignanese, Borna Radatović, Vlastimil Mazánek, David Sedmidubský, Zdeněk Sofer   +13 more
wiley   +1 more source