Zobrazeno 1 - 10
of 134
pro vyhledávání: '"Kumaravadivel, P."'
Autor:
Barrier, Julien, Kim, Minsoo, Kumar, Roshan Krishna, Xin, Na, Kumaravadivel, P., Hague, Lee, Nguyen, E., Berdyugin, A. I., Moulsdale, Christian, Enaldiev, V. V., Prance, J. R., Koppens, F. H. L., Gorbachev, R. V., Watanabe, K., Taniguchi, T., Glazman, L. I., Grigorieva, I. V., Fal'ko, V. I., Geim, A. K.
Publikováno v:
Nature 628, 741-745 (2024)
Extensive efforts have been undertaken to combine superconductivity and the quantum Hall effect so that Cooper-pair transport between superconducting electrodes in Josephson junctions is mediated by one-dimensional edge states. This interest has been
Externí odkaz:
http://arxiv.org/abs/2402.14451
Autor:
Xin, Na, Lourembam, James, Kumaravadivel, P., Kazantsev, A. E., Wu, Zefei, Mullan, Ciaran, Barrier, Julien, Geim, Alexandra A., Grigorieva, I. V., Mishchenko, A., Principi, A., Falko, V. I., Ponomarenko, L. A., Geim, A. K., Berdyugin, Alexey I.
Publikováno v:
Nature 616, 270-274 (2023)
The most recognizable feature of graphene's electronic spectrum is its Dirac point around which interesting phenomena tend to cluster. At low temperatures, the intrinsic behavior in this regime is often obscured by charge inhomogeneity but thermal ex
Externí odkaz:
http://arxiv.org/abs/2302.06863
Autor:
Achari, A., Bekaert, J., Sreepal, V., Orekhov, A., Kumaravadivel, P., Kim, M., Gauquelin, N., Pillai, P. Balakrishna, Verbeeck, J., Peeters, F. M., Geim, A. K., Milosevic, M. V., Nair, R. R.
Publikováno v:
Nano Lett. 22,6268,2022
Van der Waals (vdW) heterostructures continue to attract intense interest as a route of designing materials with novel properties that cannot be found in naturally occurring materials. Unfortunately, this approach is currently limited to only a few l
Externí odkaz:
http://arxiv.org/abs/2206.11665
Autor:
Greenaway, M. T., Kumaravadivel, P., Wengraf, J., Ponomarenko, L. A., Li, A. I. Berdyugin. J., Edgar, J. H., Kumar, R. Krishna, Geim, A. K., Eaves, L.
Oscillatory magnetoresistance measurements on graphene have revealed a wealth of novel physics. These phenomena are typically studied at low currents. At high currents, electrons are driven far from equilibrium with the atomic lattice vibrations so t
Externí odkaz:
http://arxiv.org/abs/2110.09812
Autor:
Berdyugin, Alexey I., Xin, Na, Gao, Haoyang, Slizovskiy, Sergey, Dong, Zhiyu, Bhattacharjee, Shubhadeep, Kumaravadivel, P., Xu, Shuigang, Ponomarenko, L. A., Holwill, Matthew, Bandurin, D. A., Kim, Minsoo, Cao, Yang, Greenaway, M. T., Novoselov, K. S., Grigorieva, I. V., Watanabe, K., Taniguchi, T., Fal'ko, V. I., Levitov, L. S., Kumar, R. Krishna, Geim, A. K.
Publikováno v:
Science 375, 430-433 (2022)
In thermodynamic equilibrium, current in metallic systems is carried by electronic states near the Fermi energy whereas the filled bands underneath contribute little to conduction. Here we describe a very different regime in which carrier distributio
Externí odkaz:
http://arxiv.org/abs/2106.12609
Autor:
Barrier, Julien, Kumaravadivel, Piranavan, Krishna-Kumar, Roshan, Ponomarenko, L. A., Xin, Na, Holwill, Matthew, Mullan, Ciaran, Kim, Minsoo, Gorbachev, R. V., Thompson, M. D., Prance, J. R., Taniguchi, T., Watanabe, K., Grigorieva, I. V., Novoselov, K. S., Mishchenko, A., Fal'ko, V. I., Geim, A. K., Berdyugin, A. I.
Publikováno v:
Nat Commun 11, 5756 (2020)
In quantizing magnetic fields, graphene superlattices exhibit a complex fractal spectrum often referred to as the Hofstadter butterfly. It can be viewed as a collection of Landau levels that arise from quantization of Brown-Zak minibands recurring at
Externí odkaz:
http://arxiv.org/abs/2006.15040
Autor:
Kim, M., Xu, S. G., Berdyugin, A. I., Principi, A., Slizovskiy, S., Xin, N., Kumaravadivel, P., Kuang, W., Hamer, M., Kumar, R. Krishna, Gorbachev, R. V., Watanabe, K., Taniguchi, T., Grigorieva, I. V., Fal'ko, V. I., Polini, M., Geim, A. K.
Publikováno v:
Nature Communications 11, 2339 (2020)
Electron-electron interactions play a critical role in many condensed matter phenomena, and it is tempting to find a way to control them by changing the interactions' strength. One possible approach is to place a studied system in proximity of a meta
Externí odkaz:
http://arxiv.org/abs/1911.10128
Autor:
Berdyugin, A. I., Tsim, B., Kumaravadivel, P., Xu, S. G., Ceferino, A., Knothe, A., Kumar, R. Krishna, Taniguchi, T., Watanabe, K., Geim, A. K., Grigorieva, I. V., Fal'ko, V. I.
Publikováno v:
Sci. Adv. 6, eaay7838 (2020)
Magnetic fields force ballistic electrons injected from a narrow contact to move along skipping orbits and form caustics. This leads to pronounced resistance peaks at nearby voltage probes as electrons are effectively focused inside them, a phenomeno
Externí odkaz:
http://arxiv.org/abs/1911.02827
Autor:
Xu, S. G., Berdyugin, A. I., Kumaravadivel, P., Guinea, F., Kumar, R. Krishna, Bandurin, D. A., Morozov, S. V., Kuang, W., Tsim, B., Liu, S., Edgar, J. H., Grigorieva, I. V., Fal'ko, V. I., Kim, M., Geim, A. K.
Publikováno v:
Nature Communications 10, 4008 (2019)
The electronic properties of graphene superlattices have attracted intense interest that was further stimulated by the recent observation of novel many-body states at "magic" angles in twisted bilayer graphene (BLG). For very small ("marginal") twist
Externí odkaz:
http://arxiv.org/abs/1905.12984
Publikováno v:
Phys. Rev. B 100, 155120 (2019)
Recently observed magnetophonon resonances in the magnetoresistance of graphene are investigated using the Kubo formalism. This analysis provides a quantitative fit to the experimental data over a wide range of carrier densities. It demonstrates the
Externí odkaz:
http://arxiv.org/abs/1905.03602