Results 61 to 70 of about 52,373 (281)

Raman-scattering study of the phonon dispersion in twisted bi-layer graphene

, 2013
Bi-layer graphene with a twist angle \theta\ between the layers generates a superlattice structure known as Moir\'{e} pattern. This superlattice provides a \theta-dependent q wavevector that activates phonons in the interior of the Brillouin zone.
Achete, C. A., Campos-Delgado, J., Cançado, L. G., Jorio, A., Raskin, J. -P.   +4 more
core   +1 more source

Magnetic and Structural Response Tuned by Coexisting Mn Concentration‐Dependent Phases in MnBi2Te4 Thin Film Grown on GaAs(001) by Molecular Beam Epitaxy

Advanced Functional Materials, EarlyView.
The study explores structural and magnetic properties of one of the most recent topological quantum materials (MnBi2Te4). The Mn‐poor structure leads to stacking faults (quintuple layer ‐ QL of Bi2Te3 formation instead of a septuple layer ‐ SL of MnBi2Te4), resulting in a coexistence between weak antiferromagnetism and ferromagnetism.
Wesley F. Inoch, Sergio L. A. Mello, Gilberto Rodrigues‐Junior, Sukarno O. Ferreira, Marcelo M. Sant'Anna, Benjamin R. Salles, Mateus T. Souza, Sérgio L. Morelhão, Maybi F. Sampaio, Bráulio S. Archanjo, Leonarde N. Rodrigues   +10 more
wiley   +1 more source

Domain‐Wall‐Free Sliding Ferroelectricity in Fully Commensurate 3R Transition Metal Dichalcogenide Bilayers

Advanced Functional Materials, EarlyView.
It is reported that the ferroelectric switching behavior of rhombohedral (3R) phase transition metal dichalcogenide (TMD) bilayers strongly depends on their domain structures. Single‐domain TMDs (SD‐TMDs) with domain‐wall‐free structures exhibit robust and stable polarization switching, whereas poly‐domain TMDs (PD‐TMDs) with randomly distributed ...
Ji‐Hwan Baek, Seong Chul Hong, Jinwoo Kim, Hyeongseok Lee, Hyun Woo Jeong, Kenji Watanabe, Takashi Taniguchi, Min Hyuk Park, Gwan‐Hyoung Lee   +8 more
wiley   +1 more source

Performance Comparison between AB5 and Superlattice Metal Hydride Alloys in Sealed Cells

Batteries, 2017
High-power cylindrical nickel metal/hydride batteries using a misch metal-based Al-free superlattice alloy with a composition of La11.3Pr1.7Nd5.1Mg4.5Ni63.6Co13.6Zr0.2 were fabricated and evaluated against those using a standard AB5 metal hydride alloy ...
John M. Koch, Kwo-Hsiung Young, Jean Nei, Chaolan Hu, Benjamin Reichman   +4 more
doaj   +1 more source

Enhancement of Rabi Splitting in a Microcavity with an Embedded Superlattice

, 2001
We have observed a large coupling between the excitonic and photonic modes of an AlAs/AlGaAs microcavity filled with an 84-({\rm {\AA}})/20({\rm {\AA}}) GaAs/AlGaAs superlattice.
A. A. Allerman, A. Tredicucci, A.R. Pratt, A.R. Pratt, C. Pecharromán, C. Weisbuch, E. E. Mendez, E.E. Mendez, F. Agulló-Rueda, F. Boeuf, I.W. Tao, J. Bloch, J. H. Dickerson, J.H. Dickerson, L.S. Dang, R. Houdré, R. Houdré, R.P. Stanley, S. Manotas, T.R. Nelson, V. Savona, Y. Zhu   +21 more
core   +1 more source

Atomically Revealing Bulk Point Defect Dynamics in Hydrogen‐Driven γ‐Fe2O3 → Fe3O4 → FeO Transformation

Advanced Functional Materials, EarlyView.
In situ TEM uncovers the atomic‐scale mechanisms underlying hydrogen‐driven γ‐Fe2O3→Fe3O4→FeO reduction. In γ‐Fe2O3, oxygen vacancies cluster around intrinsic Fe vacancies, leading to nanopore formation, whereas in Fe3O4, vacancy aggregation is suppressed, preserving a dense structure.
Yupeng Wu, Dongxiang Wu, Wenhui Zhu, Xiaobo Chen, Zhikang Zhou, Zhilu Liang, Shuonan Ye, Meng Li, Xiao Tong, Kim Kisslinger, Sooyeon Hwang, Dmitri Zakharov, Renu Sharma, Judith C. Yang, Guangwen Zhou   +14 more
wiley   +1 more source

Strain-Compensated AlInGaAs-GaAsP Superlattices for Highly-Polarized Electron Emission

, 2004
Spin-polarized electron emission from the first superlattice photocathodes developed with strain compensation is investigated. An opposite strain in the quantum well and barrier layers is complished using an InAlGaAs/GaAsP superlattice structure.
Clendenin, J. E., Gerchikov, L. G., Luh, D. -A., Mamaev, Yu. A., Maruyama, T., Roberts, J. S., Subashiev, A. V., Yashin, Yu. P.   +7 more
core   +2 more sources

Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics

Advanced Functional Materials, EarlyView.
Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha, Yingshan Ma, Yong Nam An, Sung‐Un An, Hyeon Hak Jung, Suvi‐Tuuli Varjamo, Jiwon Yoo, Junho Min, Hanvit Kim, Faisal Ahmed, Sang Hoon Chae, Young Min Song, Weiwei Cai, Tawfique Hasan, Zhipei Sun, Dong‐Ho Kang, Hyeon‐Jin Shin, Yunyun Dai, Hoon Hahn Yoon   +18 more
wiley   +1 more source

Current responsivity of semiconductor superlattice THz-photon detectors [PDF]

, 1998
The current responsivity of a semiconductor superlattice THz-photon detector is calculated using an equivalent circuit model which takes into account the finite matching efficiency between a detector antenna and the superlattice in the presence of ...
Ignatov, Anatoly A., Jauho, Antti-Pekka
core   +2 more sources

Atomic–molecular superlattices

Chem. Commun., 2006
In this communication we demonstrate a directly-bonded crystalline fullerene superlattice and show that the incorporation of spin-active N@C60 endohedral fullerenes is readily achieved to give an atomic-molecular hybrid spin-active superlattice material.
Watt, A, Sambrook, MR, Porfyrakis, K, Lovett, B, El Mkami, H, Smith, G, Briggs, G   +6 more
openaire   +2 more sources