Results 271 to 280 of about 334,237 (330)

Spin and Charge Control of Topological End States in Chiral Graphene Nanoribbons on a 2D Ferromagnet

Advanced Materials, EarlyView.
Chiral graphene nanoribbons on a ferromagnetic gadolinium‐gold surface alloy display tunable spin and charge states at their termini. Atomic work function variations and exchange fields enabe transitions between singlet, doublet, and triplet configurations.
Leonard Edens, Francisco Romero‐Lara, Trisha Sai, Kalyan Biswas, Manuel Vilas‐Varela, Thomas Frederiksen, Diego Peña, Fabian Schulz, Jose Ignacio Pascual   +8 more
wiley   +1 more source

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

Advanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano, Fabián Calleja, Ji Dai, Massimo Tallarida, Vera Marinova, Alessandro Barla, Marc G. Cuxart, Pierluigi Gargiani, Gonzalo N. Molina, José Angel Silva‐Guillén, Adriana I. Figueroa, Kevin García‐Díez, Sergio O. Valenzuela, Aitor Mugarza, Amadeo L. Vázquez de Parga, Rodolfo Miranda, Francisco Guinea, Manuela Garnica, Miguel A. Valbuena   +18 more
wiley   +1 more source

Resolving the Structural Duality of Graphene Grain Boundaries

Advanced Materials, EarlyView.
Cantilever ncAFM resolves the atomic structure of grain boundaries in graphene, revealing coexisting stable and metastable types. Both contain pentagon/heptagon defects, but metastable GBs show irregular geometries. Modeling shows metastable GBs form under compression, exhibiting vertical corrugation, while stable GBs are flat.
Haojie Guo, Emiliano Ventura‐Macías, Mariano D. Jiménez‐Sánchez, Nicoleta Nicoara, Pierre Mallet, Jean‐Yves Veuillen, Vincent T. Renard, Antonio J. Martínez‐Galera, Pablo Pou, Julio Gómez‐Herrero, Rubén Pérez, Iván Brihuega   +11 more
wiley   +1 more source

Revealing How Acid Sites Enhance the Electrocatalytic Glycerol Oxidation Performance on Pt Loaded Zeolite‐Carbon Composite Materials

Advanced Materials, EarlyView.
In the work reported herein, the catalytic effects of acid sites on electrocatalytic glycerol oxidation reaction are investigated by using a novel catalytic material system that integrates Pt metal sites with acidic Al sites. Abstract The catalytic role and function of acid sites in solid acid catalysts, such as zeolites, are well understood in the ...
Ju Ye Kim, Sunjae No, Jinwoo Hwang, Mi Yoo, Hakju Lee, Youngbi Kim, Youngmin Kim, Yong Tae Kim, Jeong‐Chul Kim, Jeong Woo Han, Kyoungsoo Kim, Hyung Ju Kim   +11 more
wiley   +1 more source

Theoretical and computational study of a quad-band optical switch and three-bit encoder based on a graphene metasurface. [PDF]

iScience
Dai J, Zhu J.
europepmc   +1 more source

van Hove singularity at the Fermi level due to oxygen in noble metal

, 2018
Sudipta Roy Barman, Aparna Chakrabarti
openalex   +1 more source

Validation of quantitative perfusion cardiovascular magnetic resonance employing deconvolution techniques with Tofts, modified-Tofts, and Fermi function models against ¹⁵O-water positron emission tomography. [PDF]

J Cardiovasc Magn Reson
Takafuji M, Ishida M, Ichikawa Y, Nakamura S, Ito H, Kokawa T, Araki S, Yamaguchi S, Hashimoto N, Nakamori S, Kurita T, Dohi K, Sakuma H.   +12 more
europepmc   +1 more source

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Fermi levels in solution

Applied Physics Letters, 1983
The conventional concept that there is a so-called Fermi level for electronic states in solution which can be identified with the reversible potential on the vacuum scale of a redox couple present in solution (and in equilibrium with an electrode therein) is not valid. The inner potential of the solution phase should be added to the redox potential (on
John O’M. Bockris, Shahed U. M. Khan
openaire   +1 more source

Fermi GBM: Main detector-level calibration results

AIP Conference Proceedings, 2009
One of the scientific objectives of NASA’s Fermi Gamma‐ray Space Telescope is the study of Gamma‐Ray Bursts (GRBs). The Fermi Gamma‐Ray Burst Monitor (GBM) was designed to detect and localize bursts for the Fermi mission. By means of an array of 12 NaI(Tl) (8 keV to 1 MeV) and two BGO (0.2 to 40 MeV) scintillation detectors, GBM extends the energy ...
BISSALDI, ELISABETTA, von Kienlin, A. , Lichti, G. , Steinle, H. , Bhat, P. N. , Briggs, M. S. , Fishman, G. J. , Hoover, A. S. , Kippen, R. M. , Krumrey, M. , Gerlach, M. , Connaughton, V. , Diehl, R. , Greiner, J., van der Horst, A. J. , Kouveliotou, C. , McBreen, S. , Meegan, C. A. , Paciesas, W. S. , Preece, R. D., Wilson Hodge, C. A.   +23 more
openaire   +3 more sources

The Fermi Level

2020
Abstract The Fermi level is the maximum energy of the electrons in a material. Effectively there is a Fermi equation: EF = Emax. This chapter examines the discrete electron energy levels in individual atoms as a consequence of the Pauli exclusion principle, the corresponding energy bands in a material composed of many atoms or ...
openaire   +1 more source