Výsledky vyhledávání - "Dvoretsky, Sergey"

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Roles of band gap and Kane electronic dispersion in the THz-frequency nonlinear optical response in HgCdTe

Autor: Soranzio, Davide, Abreu, Elsa, Houver, Sarah, Dössegger, Janine, Savoini, Matteo, Teppe, Frédéric, Krishtopenko, Sergey, Mikhailov, Nikolay N., Dvoretsky, Sergey A., Johnson, Steven L.

Materials with linear electronic dispersion often feature high carrier mobilities and unusually strong nonlinear optical interactions. In this work, we investigate the THz nonlinear dynamics of one such material, HgCdTe, with an electronic band dispe

Externí odkaz: http://arxiv.org/abs/2404.10582

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Supercurrent interference in HgTe Josephson junctions

Autor: Himmler, Wolfgang, Fischer, Ralf, Barth, Michael, Fuchs, Jacob, Kozlov, Dmitry A., Mikhailov, Nikolay N., Dvoretsky, Sergey A., Strunk, Christoph, Gorini, Cosimo, Richter, Klaus, Weiss, Dieter

Wires made of topological insulators (TI) are a promising platform for searching for Majorana bound states. These states can be probed by analyzing the fractional ac Josephson effect in Josephson junctions with the TI wire as a weak link. An axial ma

Externí odkaz: http://arxiv.org/abs/2211.06702

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$4\pi$-periodic supercurrent tuned by an axial magnetic flux in topological insulator nanowires

Autor: Fischer, Ralf, Picó-Cortés, Jordi, Himmler, Wolfgang, Platero, Gloria, Grifoni, Milena, Kozlov, Dmitriy A., Mikhailov, N. N., Dvoretsky, Sergey A., Strunk, Christoph, Weiss, Dieter

Topological insulator (TI) nanowires in proximity with conventional superconductors have been proposed as a tunable platform to realize topological superconductivity and Majorana zero modes (MZM). The tuning is done using an axial magnetic flux $\Phi

Externí odkaz: http://arxiv.org/abs/2110.05143

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Quantum Hall effect and Landau levels in the 3D topological insulator HgTe

Autor: Ziegler, Johannes, Kozlov, Dmitriy A., Mikhailov, Nikolay N., Dvoretsky, Sergey A., Weiss, Dieter

Publikováno v: Phys. Rev. Research 2, 033003 (2020)

We review low and high field magnetotransport in 80 nm-thick strained HgTe, a material that belongs to the class of strong three-dimensional topological insulators. Utilizing a top gate, the Fermi level can be tuned from the valence band via the Dira

Externí odkaz: http://arxiv.org/abs/2003.01741

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Perspectives of HgTe Topological Insulators for Quantum Hall Metrology

Autor: Yahniuk, Ivan, Krishtopenko, Sergey S., Grabecki, Grzegorz, Jouault, Benoit, Consejo, Christophe, Desrat, Wilfried, Majewicz, Magdalena, Kadykov, Alexander M., Spirin, Kirill E., Gavrilenko, Vladimir I., Mikhailov, Nikolay N., Dvoretsky, Sergey A., But, Dmytro B., Teppe, Frederic, Wróbel, Jerzy, Cywiński, Grzegorz, Kret, 1 Sławomir, Dietl, Tomasz, Knap, Wojciech

Publikováno v: npj Quantum Materials (2019) 4:13

We report the studies of high-quality HgTe/(Cd,Hg)Te quantum wells (QWs) with a width close to the critical one $d_c$, corresponding to the topological phase transition and graphene like band structure in view of their applications for Quantum Hall E

Externí odkaz: http://arxiv.org/abs/1810.07449

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Ballistic geometric resistance resonances in a single surface of a topological insulator

Autor: Maier, Hubert, Ziegler, Johannes, Fischer, Ralf, Kozlov, Dmitriy, Kvon, Ze Don, Mikhailov, Nikolay, Dvoretsky, Sergey A., Weiss, Dieter

Transport in topological matter has shown a variety of novel phenomena over the last decade. Although numerous transport studies have been conducted on three-dimensional topological insulators (3D-TIs), study of ballistic motion and thus exploration

Externí odkaz: http://arxiv.org/abs/1708.07766

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Probing Spin Helical Surface States in Topological HgTe Nanowires

Autor: Ziegler, Johannes, Kozlovsky, Raphael, Gorini, Cosimo, Liu, Ming-Hao, Weishäupl, Sabine, Maier, Hubert, Fischer, Ralf, Kozlov, Dmitriy A., Kvon, Ze Don, Mikhailov, Nikolay N., Dvoretsky, Sergey A., Richter, Klaus, Weiss, Dieter

Publikováno v: Phys. Rev. B 97, 035157 (2018)

Nanowires with helical surface states represent key prerequisites for observing and exploiting phase-coherent topological conductance phenomena, such as spin-momentum locked quantum transport or topological superconductivity. We demonstrate in a join

Externí odkaz: http://arxiv.org/abs/1708.07014

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