Lorentz‐Boost‐Driven Magneto‐Optics in a Dirac Nodal‐Line Semimetal

Autor: Jan Wyzula, Xin Lu, David Santos‐Cottin, Dibya Kanti Mukherjee, Ivan Mohelský, Florian Le Mardelé, Jiří Novák, Mario Novak, Raman Sankar, Yuriy Krupko, Benjamin A. Piot, Wei‐Li Lee, Ana Akrap, Marek Potemski, Mark O. Goerbig, Milan Orlita

Publikováno v: Advanced Science, Vol 9, Iss 23, Pp n/a-n/a (2022)

Abstract Optical response of crystalline solids is to a large extent driven by excitations that promote electrons among individual bands. This allows one to apply optical and magneto‐optical methods to determine experimentally the energy band gap �

Externí odkaz: https://doaj.org/article/dd08d5f9f4334e1291bad668ef2c54c8

Multiple flat bands and topological Hofstadter butterfly in twisted bilayer graphene close to the second magic angle

Autor: Giulio Romagnoli, Gaurav Chaudhary, Xiaobo Lu, Benjamin A. Piot, Allan H. MacDonald, Takashi Taniguchi, Martino Poggio, Kenji Watanabe, Biao Lian, Dmitri K. Efetov, B. Andrei Bernevig

Publikováno v: Proceedings of the National Academy of Sciences of the United States of America
Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2021, 118 (30), pp.e2100006118. ⟨10.1073/pnas.2100006118⟩
Proc Natl Acad Sci U S A

Moir\'e superlattices in two-dimensional (2D) van der Waals (vdW) heterostructures provide 20 an efficient way to engineer electron band properties. The recent discovery of exotic quantum phases and their interplay in twisted bilayer graphene (tBLG)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b7bbf5de025e746729770346bef87ec
https://hal.archives-ouvertes.fr/hal-03426213

Magnetospectroscopy of double HgTe/CdHgTe QWs with inverted band structure in high magnetic fields up to 30 T

Autor: Sergey S. Krishtopenko, S. A. Dvoretskii, K. V. Maremyanin, A. V. Ikonnikov, L. S. Bovkun, Frederic Teppe, V. I. Gavrilenko, N. N. Mikhailov, V. Ya. Aleshkin, Marek Potemski, Benjamin A. Piot, Milan Orlita

Publikováno v: Opto-Electronics Review
Opto-Electronics Review, Springer Verlag, 2019, 27 (2), pp.213-218. ⟨10.1016/j.opelre.2019.06.001⟩
Opto-Electronics Review, 2019, 27 (2), pp.213-218. ⟨10.1016/j.opelre.2019.06.001⟩

Magnetoabsorption in far and mid IR ranges in double HgTe/CdHgTe quantum wells with inverted band structure has been studied in high magnetic fields up to 30 T. Numerous intraband and interband transitions have been revealed in the spectra and interp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b494f9db760d346656bef398362f74d5
https://doi.org/10.1016/j.opelre.2019.06.001

Electronic phase separation in multilayer rhombohedral graphite

Autor: Jun Yin, Vladimir I. Fal'ko, Benjamin A. Piot, Julien Barrier, S. V. Morozov, Shuigang Xu, Artem Mishchenko, Yanmeng Shi, Servet Ozdemir, Yaping Yang, Sergey Slizovskiy, Kenji Watanabe, Takashi Taniguchi, Alexei I. Berdyugin, Ciaran Mullan, A. K. Geim, Seok-Kyun Son, Kostya S. Novoselov

Publikováno v: Shi, Y, Xu, S, Yang, Y, Slizovskiy, S, Morozov, S V, Son, S-K, Ozdemir, S, Mullan, C, Barrier, J, Yin, J, Berdyugin, A I, Piot, B A, Taniguchi, T, Watanabe, K, Fal’ko, V I, Novoselov, K S, Geim, A K & Mishchenko, A 2020, ' Electronic phase separation in multilayer rhombohedral graphite ', Nature, vol. 584, s41586-020-2568-2, pp. 210-214 . https://doi.org/10.1038/s41586-020-2568-2
Nature
Nature, Nature Publishing Group, 2020, 584 (7820), pp.210-214. ⟨10.1038/s41586-020-2568-2⟩

Of the two stable forms of graphite, hexagonal (HG) and rhombohedral (RG), the former is more common and has been studied extensively. RG is less stable, which so far precluded its detailed investigation, despite many theoretical predictions about th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1cdd66e0cb769cd0a92306d9da6aefe
https://doi.org/10.1038/s41586-020-2568-2

Landau level spectroscopy of Bi 2 Te 3

Autor: Gerard Martinez, Adam Dubroka, J. Wyzula, I. Mohelský, G. Springholz, Y. Krupko, A. O. Slobodeniuk, Milan Orlita, Ondřej Caha, Josef Humlíček, G. Bauer, Benjamin A. Piot

Publikováno v: Physical Review B
Physical Review B, American Physical Society, 2020, 102, ⟨10.1103/PhysRevB.102.085201⟩

Here we report on Landau level spectroscopy in magnetic fields up to 34 T performed on a thin film of topological insulator Bi$_2$Te$_3$ epitaxially grown on a BaF$_2$ substrate. The observed response is consistent with the picture of a direct-gap se

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6afdeae59ac8099c69aef27a05c78f9c
https://hal.archives-ouvertes.fr/hal-02944828/file/MohelskyPRB20.pdf