TY - THES AU - Kovács-Krausz, Zoltán TI - Spin-orbit effects in novel 2D nanomaterials: spintronics and topological states PB - Budapesti Műszaki és Gazdaságtudományi Egyetem PY - 2023 SP - 170 UR - https://m2.mtmt.hu/api/publication/34735492 ID - 34735492 LA - English DB - MTMT ER - TY - GEN AU - Kovács-Krausz, Zoltán AU - Nagy, Dániel AU - Márffy, Albin Máté AU - Karpiak, Bogdan AU - Tajkov, Zoltán AU - Oroszlány, László AU - Koltai, János AU - Nemes Incze, Péter AU - Dash, Saroj P AU - Makk, Péter AU - Csonka, Szabolcs AU - Tóvári, Endre TI - Signature of pressure-induced topological phase transition in ZrTe5 PY - 2023 UR - https://m2.mtmt.hu/api/publication/34719870 ID - 34719870 AB - The layered van der Waals material ZrTe5 is known as a candidate topological insulator (TI), however its topological phase and the relation with other properties such as an apparent Dirac semimetallic state is still a subject of debate. We employ a semiclassical multicarrier transport (MCT) model to analyze the magnetotransport of ZrTe5 nanodevices at hydrostatic pressures up to 2 GPa. The temperature dependence of the MCT results between 10 and 300 K is assessed in the context of thermal activation, and we obtain the positions of conduction and valence band edges in the vicinity of the chemical potential. We find evidence of the closing and subsequent re-opening of the band gap with increasing pressure, which is consistent with a phase transition from weak to strong TI. This matches expectations from ab initio band structure calculations, as well as previous observations that CVT-grown ZrTe5 is in a weak TI phase in ambient conditions. LA - English DB - MTMT ER - TY - JOUR AU - Máthé, L. AU - Kovács-Krausz, Zoltán AU - Botiz, I. AU - Grosu, I. AU - El, Anouz K. AU - El, Allati A. AU - Zârbo, L.P. TI - Phonon-Assisted Tunneling through Quantum Dot Systems Connected to Majorana Bound States JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 13 PY - 2023 IS - 10 PG - 15 SN - 2079-4991 DO - 10.3390/nano13101616 UR - https://m2.mtmt.hu/api/publication/34004074 ID - 34004074 N1 - Center of Advanced Research and Technologies for Alternative Energies, National Institute for R & D of Isotopic and Molecular Technologies, 67-103 Donat, Cluj-Napoca, 400293, Romania Faculty of Physics, Babeș-Bolyai University, 1 Kogălniceanu, Cluj-Napoca, 400084, Romania Department of Physics, Institute of Physics, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest, H-1111, Hungary Interdisciplinary Research Institute in Bio-Nano-Sciences, Babeș-Bolyai University, 42 Treboniu Laurian, Cluj-Napoca, 400271, Romania Laboratory of R & D in Engineering Sciences, Faculty of Sciences and Techniques Al-Hoceima, Abdelmalek Essaadi University, Tetouan, 93000, Morocco Export Date: 8 June 2023 Correspondence Address: Zârbo, L.P.; Center of Advanced Research and Technologies for Alternative Energies, 67-103 Donat, Romania; email: liviu.zarbo@itim-cj.ro LA - English DB - MTMT ER - TY - JOUR AU - Kovács-Krausz, Zoltán AU - Tóvári, Endre AU - Nagy, Dániel AU - Márffy, Albin Máté AU - Karpiak, Bogdan AU - Tajkov, Zoltán AU - Oroszlány, László AU - Koltai, János AU - Nemes Incze, Péter AU - Dash, Saroj P. AU - Makk, Péter AU - Csonka, Szabolcs TI - Revealing the band structure of ZrTe5 using multicarrier transport JF - PHYSICAL REVIEW B J2 - PHYS REV B VL - 107 PY - 2023 IS - 7 PG - 10 SN - 2469-9950 DO - 10.1103/PhysRevB.107.075152 UR - https://m2.mtmt.hu/api/publication/33673970 ID - 33673970 LA - English DB - MTMT ER - TY - JOUR AU - Fülöp, Bálint AU - Márffy, Albin Máté AU - Tóvári, Endre AU - Kedves, Máté AU - Zihlmann, Simon AU - Indolese, David AU - Kovács-Krausz, Zoltán AU - Watanabe, Kenji AU - Taniguchi, Takashi AU - Schönenberger, Christian AU - Kézsmárki, István AU - Makk, Péter AU - Csonka, Szabolcs TI - New method of transport measurements on van der Waals heterostructures under pressure JF - JOURNAL OF APPLIED PHYSICS J2 - J APPL PHYS VL - 130 PY - 2021 IS - 6 PG - 13 SN - 0021-8979 DO - 10.1063/5.0058583 UR - https://m2.mtmt.hu/api/publication/32130144 ID - 32130144 N1 - Department of Physics, Budapest University of Technology and Economics, Nanoelectronics "momentum" Research Group, Hungarian Academy of Sciences, Budafoki út 8, Budapest, 1111, Hungary Department of Physics, University of Basel, Klingelbergstrasse 82, Basel, CH-4056, Switzerland Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan Experimental Physics v, Center for Electronic Correlations and Magnetism, University of Augsburg, Augsburg, D-86159, Germany Export Date: 18 September 2021 CODEN: JAPIA Correspondence Address: Makk, P.; Department of Physics, Budafoki út 8, Hungary; email: makk.peter@ttk.bme.hu Funding details: 2017-1.2.1-NKP-2017-00001 Funding details: Swiss Nanoscience Institute, SNI Funding details: European Research Council, ERC, 787414 Funding details: European Cooperation in Science and Technology, COST, CA16218 Funding details: Japan Society for the Promotion of Science, KAKEN, JP20H00354 Funding details: Ministry of Education, Culture, Sports, Science and Technology, Monbusho, JPMXP0112101001 Funding details: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, SNF Funding details: Japan Science and Technology Agency, JST Funding details: Core Research for Evolutional Science and Technology, CREST, JPMJCR15F3 Funding details: Hungarian Scientific Research Fund, OTKA, FK-123894 Funding details: National Center of Competence in Research Quantum Science and Technology, NCCR QSIT Funding details: Innovációs és Technológiai Minisztérium Funding details: National Research, Development and Innovation Office Funding text 1: This work acknowledges support from the Topograph FlagERA network, the OTKA FK-123894 grants, the Swiss Nanoscience Institute (SNI), the ERC project Top-Supra (No. 787414), the Swiss National Science Foundation, and the Swiss NCCR QSIT. This research was supported by the Ministry of Innovation and Technology and the National Research, Development and Innovation Office within the Quantum Information National Laboratory of Hungary and by the Quantum Technology National Excellence Program (Project No. 2017-1.2.1-NKP-2017-00001), by the SuperTop QuantERA network, and by the FET Open AndQC network. This article is based upon work from COST Action CA16218 Nanocohybri, supported by COST (European Cooperation in Science and Technology)—www.cost.eu. P.M. and E.T. received funding from Bolyai Fellowship. K.W. and T.T. acknowledge support from the Elemental Strategy Initiative conducted by the MEXT, Japan (Grant No. JPMXP0112101001), JSPS KAKENHI (Grant No. JP20H00354), and the CREST(No. JPMJCR15F3), JST. The authors thank Gergö Fülöp for his visual and Márton Hajdú and Ferenc Fülöp for their technical support. LA - English DB - MTMT ER - TY - JOUR AU - Kovács-Krausz, Zoltán AU - Hoque, Anamul Md AU - Makk, Péter AU - Szentpéteri, Bálint AU - Kocsis, Mátyás AU - Fülöp, Bálint AU - Yakushev, Michael Vasilievich AU - Kuznetsova, Tatyana Vladimirovna AU - Tereshchenko, Oleg Evgenevich AU - Kokh, Konstantin Aleksandrovich AU - Lukács, István Endre AU - Taniguchi, Takashi AU - Watanabe, Kenji AU - Dash, Saroj Prasad AU - Csonka, Szabolcs TI - Electrically Controlled Spin Injection from Giant Rashba Spin–Orbit Conductor BiTeBr JF - NANO LETTERS J2 - NANO LETT VL - 20 PY - 2020 IS - 7 SP - 4782 EP - 4791 PG - 10 SN - 1530-6984 DO - 10.1021/acs.nanolett.0c00458 UR - https://m2.mtmt.hu/api/publication/31357113 ID - 31357113 LA - English DB - MTMT ER - TY - JOUR AU - Tóvári, Endre AU - Makk, Péter AU - Liu, Ming-Hao AU - Rickhaus, Peter AU - Kovács-Krausz, Zoltán AU - Richter, Klaus AU - Schönenberger, Christian AU - Csonka, Szabolcs TI - Gate-controlled conductance enhancement from quantum Hall channels along graphene p-n junctions JF - NANOSCALE J2 - NANOSCALE VL - 8 PY - 2016 IS - 47 SP - 19910 EP - 19916 PG - 7 SN - 2040-3364 DO - 10.1039/C6NR05100F UR - https://m2.mtmt.hu/api/publication/3148115 ID - 3148115 N1 - Funding text 1: This work was funded by the EU ERC CooPairEnt 258789, Hungarian Grants No. OTKA K112918, and also the Swiss National Science Foundation, the Swiss Nanoscience Institute, the Swiss NCCR QSIT, the ERC Advanced Investigator Grant QUEST, the Flag ERA iSpinText, and the EU Graphene Flagship project. M-H. L. and K. R. acknowledge funding from Deutsche Forschungsgemeinschaft within SFB 689. Funding Agency and Grant Number: EU ERC CooPairEnt [258789]; Hungarian Grants [OTKA K112918]; Swiss National Science FoundationSwiss National Science Foundation (SNSF); Swiss Nanoscience Institute; Swiss NCCR QSIT; ERC Advanced Investigator Grant QUEST; Flag ERA iSpinText; EU Graphene Flagship project; Deutsche ForschungsgemeinschaftGerman Research Foundation (DFG) [SFB 689] Funding text: We acknowledge useful discussions with Romain Maurand, Andreas Baumgartner, Andras Palyi, Peter Rakyta, Laszlo Oroszlany, Matthias Droth, and Csaba Toke. This work was funded by the EU ERC CooPairEnt 258789, Hungarian Grants No. OTKA K112918, and also the Swiss National Science Foundation, the Swiss Nanoscience Institute, the Swiss NCCR QSIT, the ERC Advanced Investigator Grant QUEST, the Flag ERA iSpinText, and the EU Graphene Flagship project. M-H. L. and K. R. acknowledge funding from Deutsche Forschungsgemeinschaft within SFB 689. Department of Physics, Budapest University of Technology and Economics, Condensed Matter Research Group, Hungarian Academy of Sciences Budafoki, Út 8, Budapest, 1111, Hungary LA - English DB - MTMT ER -