Giant Nonlocality Near the Dirac Point in Graphene Abanin, D. A.; Morozov, S. V.; Ponomarenko, L. A. ...
Science (American Association for the Advancement of Science),
04/2011, Volume:
332, Issue:
6027
Journal Article
Peer reviewed
Open access
Transport measurements have been a powerful tool for discovering electronic phenomena in graphene. We report nonlocal measurements performed in the Hall bar geometry with voltage probes far away from ...the classical path of charge flow. We observed a large nonlocal response near the Dirac point in fields as low as 0.1 tesla, which persisted up to room temperature. The nonlocality is consistent with the long-range flavor currents induced by the lifting of spin/valley degeneracy. The effect is expected to contribute strongly to all magnetotransport phenomena near the neutrality point.
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We propose a new approach to generate and detect spin currents in graphene, based on a large spin-Hall response arising near the neutrality point in the presence of an external magnetic field. Spin ...currents result from the imbalance of the Hall resistivity for the spin-up and spin-down carriers induced by the Zeeman interaction, and do not involve a spin-orbit interaction. Large values of the spin-Hall response achievable in moderate magnetic fields produced by on-chip sources, and up to room temperature, make the effect viable for spintronics applications.
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We report experimental data and theoretical analysis of Coulomb drag between two closely positioned graphene monolayers in a weak magnetic field. Close enough to the neutrality point, the coexistence ...of electrons and holes in each layer leads to a dramatic increase of the drag resistivity. Away from charge neutrality, we observe nonzero Hall drag. The observed phenomena are explained by decoupling of electric and quasiparticle currents which are orthogonal at charge neutrality. The sign of magnetodrag depends on the energy relaxation rate and geometry of the sample.
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About 7% of all cancer deaths are caused by pancreatic cancer (PCa). PCa is known for its lowest survival rates among all oncological diseases and heterogenic molecular profile. Enormous amount of ...genetic changes, including somatic mutations, exceeds the limits of routine clinical genetic laboratory tests and further stagnates the development of personalized treatments. We aimed to build a mutational landscape of PCa in the Russian population based on full exome next-generation sequencing (NGS) of the limited group of patients. Applying a machine learning model on full exome individual data we received personalized recommendations for targeted treatment options for each clinical case and summarized them in the unique therapeutic landscape.
This paper covers the main scientific results and achievements of the Research Center for Applied Artificial Intelligence Systems of the Moscow Institute of Physics and Technology. Accomplishments in ...key research areas, such as (i) “Natural language analysis based on artificial intelligence methods” and (ii) “Artificial intelligence for robotics and uncrewed vehicle control,” are described. Specifically, within (i), multimodal and recommender models have been studied and text has been shown to be promising from the point of view of modality fusion: the prevailing majority of successful multimodal products work with text modality, and embeddings of any modality can often be reduced to a text embedding. At the same time, applications of multimodal models are obviously little developed: the ability to formulate and solve particular business tasks with their help is in its initial state. Within area (ii), techniques and algorithms are developed for designing a control subsystem for a robotic vehicle intended for visual simultaneous localization and mapping in real time, which improve the quality of navigation under various weather conditions in various environments (urban, rural, highway, etc.). The implementation of this project would simplify the initial prototyping of systems for navigation, computer vision, and positioning of unmanned robotic complexes and devices due to rapid data processing. Additionally, the development of bipedal anthropomorphic robots is underway: research in this scientific-engineering area is actively conducted around the world, numerous scientific works are published, and various competitions are held. To achieve the multifunctionality and flexibility required for operation in a human-friendly environment, a robot should have a design and mechanics maximally similar to parameters human. These requirements are most closely met in bipedal anthropomorphic robots. The concept of a robot design satisfying these requirements has been developed, and its detailed design for prototyping has begun. Additionally, key publications on the presented topics are described, and educational activities of the Center are surveyed.
The modified ends-fed dipole-like antenna that is fed by a hybrid ring is dwelt upon in this paper. The two energized ports of the hybrid ring provide simultaneous sum and difference radiation ...patterns. A printed circuit board prototype was simulated through the full-wave solver "CST Studio Suite" and successfully implemented. The measured results confirm the proposed approach. The input reflection coefficient for both the ports and isolation between them are better than (−15) dB. The proposed antennas can easily be integrated with monolithic electronic circuits and may find applications in high-frequency devices including wireless communication systems, radars, and so on.
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Modern devices for collecting donor blood into containers and mixing it with a preservative are presented. The principles of operation of the devices and their main parameters are described.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
The article discusses the technological and project aspects of the closure of the nuclear fuel cycle of fast neutron reactors on the example of the conceptual design of the industrial power complex. ...The advantages of using combined SNF processing technology are noted. The advantages of creating a universal production of nuclear fuel for fast neutron reactors of different configurations are given. Hypothetical sites for the production of closed nuclear fuel cycle are considered.
We present the conceptual design of a universal materials-research beamline based on the undulator of a fourth-generation synchrotron-radiation source. The distinctive feature of the beamline is its ...capability to work with both spectrally narrow (Δ
E
/
E
~ 10
–4
) and relatively broad, high-intensity radiation beams (5 × 10
–2
). The optical scheme enables rapid switching between diffraction, radiographic, and spectroscopic experimental methods while keeping the beam’s position fixed on the test sample and varying the spot size of the radiation from 100 nm to 1 mm.
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The solvatochromic behavior of a model compound mimicking the chromophore of cyan fluorescent protein (CFP) in the spectral and time domains has been studied. Analysis of the time-resolved ...fluorescence signal, carried out in 40 solvents belonging to different classes, showed that the lipophilic environment promotes an increase, while aromatic solvents and tertiary amines, a decrease in the fluorescence lifetime of the chromophore. Based on this study, the possible rational design of CFP-like proteins was proposed.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
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