@mastersthesis{MTMT:33364384, title = {Van der Waals heterostructures: from fabrication to hydrostatic pressure experiments}, url = {https://m2.mtmt.hu/api/publication/33364384}, author = {Fülöp, Bálint}, publisher = {Budapest University of Technology and Economics}, unique-id = {33364384}, year = {2022}, orcid-numbers = {Fülöp, Bálint/0000-0001-6853-2642} } @article{MTMT:32462636, title = {Tailoring the Band Structure of Twisted Double Bilayer Graphene with Pressure.}, url = {https://m2.mtmt.hu/api/publication/32462636}, author = {Szentpéteri, Bálint and Rickhaus, Peter and de Vries, Folkert K and Márffy, Albin Máté and Fülöp, Bálint and Tóvári, Endre and Watanabe, Kenji and Taniguchi, Takashi and Kormányos, Andor and Csonka, Szabolcs and Makk, Péter}, doi = {10.1021/acs.nanolett.1c03066}, journal-iso = {NANO LETT}, journal = {NANO LETTERS}, volume = {21}, unique-id = {32462636}, issn = {1530-6984}, abstract = {Twisted two-dimensional structures open new possibilities in band structure engineering. At magic twist angles, flat bands emerge, which gave a new drive to the field of strongly correlated physics. In twisted double bilayer graphene dual gating allows changing of the Fermi level and hence the electron density and also allows tuning of the interlayer potential, giving further control over band gaps. Here, we demonstrate that by application of hydrostatic pressure, an additional control of the band structure becomes possible due to the change of tunnel couplings between the layers. We find that the flat bands and the gaps separating them can be drastically changed by pressures up to 2 GPa, in good agreement with our theoretical simulations. Furthermore, our measurements suggest that in finite magnetic field due to pressure a topologically nontrivial band gap opens at the charge neutrality point at zero displacement field.}, keywords = {PRESSURE; Band structure; transport measurements; superlattice; continuum modeling; twisted double bilayer graphene}, year = {2021}, eissn = {1530-6992}, pages = {8777-8784}, orcid-numbers = {Fülöp, Bálint/0000-0001-6853-2642; Tóvári, Endre/0000-0002-0000-3805; Kormányos, Andor/0000-0002-6837-6966} } @article{MTMT:32294722, title = {Boosting proximity spin–orbit coupling in graphene/WSe2 heterostructures via hydrostatic pressure}, url = {https://m2.mtmt.hu/api/publication/32294722}, author = {Fülöp, Bálint and Márffy, Albin Máté and Zihlmann, Simon and Gmitra, Martin and Tóvári, Endre and Szentpéteri, Bálint and Kedves, Máté and Watanabe, Kenji and Taniguchi, Takashi and Fabian, Jaroslav and Schönenberger, Christian and Makk, Péter and Csonka, Szabolcs}, doi = {10.1038/s41699-021-00262-9}, journal-iso = {NPJ 2D MATER APPL}, journal = {NPJ 2D MATERIALS AND APPLICATIONS}, volume = {5}, unique-id = {32294722}, year = {2021}, eissn = {2397-7132}, orcid-numbers = {Fülöp, Bálint/0000-0001-6853-2642; Zihlmann, Simon/0000-0001-5717-2063; Gmitra, Martin/0000-0003-1118-3028; Tóvári, Endre/0000-0002-0000-3805; Szentpéteri, Bálint/0000-0003-1587-1098; Kedves, Máté/0000-0002-2057-4891; Watanabe, Kenji/0000-0003-3701-8119; Taniguchi, Takashi/0000-0002-1467-3105; Schönenberger, Christian/0000-0002-5652-460X} } @article{MTMT:32130144, title = {New method of transport measurements on van der Waals heterostructures under pressure}, url = {https://m2.mtmt.hu/api/publication/32130144}, author = {Fülöp, Bálint and Márffy, Albin Máté and Tóvári, Endre and Kedves, Máté and Zihlmann, Simon and Indolese, David and Kovács-Krausz, Zoltán and Watanabe, Kenji and Taniguchi, Takashi and Schönenberger, Christian and Kézsmárki, István and Makk, Péter and Csonka, Szabolcs}, doi = {10.1063/5.0058583}, journal-iso = {J APPL PHYS}, journal = {JOURNAL OF APPLIED PHYSICS}, volume = {130}, unique-id = {32130144}, issn = {0021-8979}, year = {2021}, eissn = {1089-7550}, orcid-numbers = {Fülöp, Bálint/0000-0001-6853-2642; Márffy, Albin Máté/0000-0002-5652-460X; Tóvári, Endre/0000-0002-0000-3805; Kedves, Máté/0000-0002-2057-4891; Zihlmann, Simon/0000-0001-5717-2063; Indolese, David/0000-0002-9436-8994; Kovács-Krausz, Zoltán/0000-0001-5821-6195; Watanabe, Kenji/0000-0003-3701-8119; Taniguchi, Takashi/0000-0002-1467-3105; Kézsmárki, István/0000-0003-4706-3247; Makk, Péter/0000-0001-7637-4672; Csonka, Szabolcs/0000-0003-0505-2806} } @article{MTMT:31779701, title = {Robust quantum point contact operation of narrow graphene constrictions patterned by AFM cleavage lithography}, url = {https://m2.mtmt.hu/api/publication/31779701}, author = {Kun, Péter and Fülöp, Bálint and Dobrik, Gergely and Nemes Incze, Péter and Lukács, István Endre and Csonka, Szabolcs and Hwang, Chanyong and Tapasztó, Levente}, doi = {10.1038/s41699-020-00177-x}, journal-iso = {NPJ 2D MATER APPL}, journal = {NPJ 2D MATERIALS AND APPLICATIONS}, volume = {4}, unique-id = {31779701}, year = {2020}, eissn = {2397-7132}, orcid-numbers = {Fülöp, Bálint/0000-0001-6853-2642; Dobrik, Gergely/0000-0002-6690-274X; Nemes Incze, Péter/0000-0002-1222-3020; Lukács, István Endre/0000-0002-4985-4475; Tapasztó, Levente/0000-0002-9377-8465} } @article{MTMT:31357113, title = {Electrically Controlled Spin Injection from Giant Rashba Spin–Orbit Conductor BiTeBr}, url = {https://m2.mtmt.hu/api/publication/31357113}, author = {Kovács-Krausz, Zoltán and Hoque, Anamul Md and Makk, Péter and Szentpéteri, Bálint and Kocsis, Mátyás and Fülöp, Bálint and Yakushev, Michael Vasilievich and Kuznetsova, Tatyana Vladimirovna and Tereshchenko, Oleg Evgenevich and Kokh, Konstantin Aleksandrovich and Lukács, István Endre and Taniguchi, Takashi and Watanabe, Kenji and Dash, Saroj Prasad and Csonka, Szabolcs}, doi = {10.1021/acs.nanolett.0c00458}, journal-iso = {NANO LETT}, journal = {NANO LETTERS}, volume = {20}, unique-id = {31357113}, issn = {1530-6984}, year = {2020}, eissn = {1530-6992}, pages = {4782-4791}, orcid-numbers = {Kovács-Krausz, Zoltán/0000-0001-5821-6195; Fülöp, Bálint/0000-0001-6853-2642; Lukács, István Endre/0000-0002-4985-4475} } @article{MTMT:30910266, title = {Observation of spin–orbit coupling induced Weyl points in a two-electron double quantum dot}, url = {https://m2.mtmt.hu/api/publication/30910266}, author = {Scherübl, Zoltán and Pályi, András and Frank, György and Lukács, István Endre and Fülöp, Gergő and Fülöp, Bálint and Nygård, J. and Watanabe, K. and Taniguchi, T. and Zaránd, Gergely Attila and Csonka, Szabolcs}, doi = {10.1038/s42005-019-0200-2}, journal-iso = {COMM PHYS}, journal = {COMMUNICATIONS PHYSICS}, volume = {2}, unique-id = {30910266}, issn = {2399-3650}, year = {2019}, eissn = {2399-3650}, orcid-numbers = {Lukács, István Endre/0000-0002-4985-4475; Fülöp, Bálint/0000-0001-6853-2642} } @article{MTMT:3390771, title = {Exfoliation of single layer BiTeI flakes}, url = {https://m2.mtmt.hu/api/publication/3390771}, author = {Fülöp, Bálint and Tajkov, Zoltán and Pető, János and Kun, Péter and Koltai, János and Oroszlány, László and Tóvári, Endre and Murakawa, H and Tokura, Y and Bordács, Sándor and Tapasztó, Levente and Csonka, Szabolcs}, doi = {10.1088/2053-1583/aac652}, journal-iso = {2D MATER}, journal = {2D MATERIALS}, volume = {5}, unique-id = {3390771}, issn = {2053-1583}, abstract = {Spin orbit interaction is strongly enhanced in structures where a heavy element is embedded in an inversion asymmetric crystal field. A simple way for realizing such a setup is to take a single atomic layer of a heavy element and encapsulate it between two atomic layers of different elemental composition. BiTeI is a promising candidate for such a 2D crystal. In its bulk form BiTeI consists of loosely coupled three atom thick layers where a layer of high atomic number Bi are sandwiched between Te and I sheets. Despite considerable recent attention to bulk BiTeI due to its giant Rashba spin splitting, the isolation of a single layer remained elusive. In this work we report the first successful isolation and characterization of a single layer of BiTeI using a novel exfoliation technique on stripped gold. Our scanning probe studies and first principles calculations show that the fabricated 100 mu m sized BiTeI flakes are stable at ambient conditions. Giant Rashba splitting and spin-momentum locking of this new 2D crystal opens the way towards novel spintronic applications and synthetic topological heterostructures.}, keywords = {AU; ENERGY; CRYSTALS; Graphene; Graphite; Rashba spin splitting; topological insulator; BiTeI; RASHBA; AU(111) SURFACE; DER-WAALS HETEROSTRUCTURES; SCANNING-TUNNELING-MICROSCOPE; stripped gold exfoliation; van der Waals heterostructures}, year = {2018}, eissn = {2053-1583}, orcid-numbers = {Fülöp, Bálint/0000-0001-6853-2642; Koltai, János/0000-0003-2576-9740; Oroszlány, László/0000-0001-5682-6424; Tóvári, Endre/0000-0002-0000-3805; Bordács, Sándor/0000-0003-0420-5997; Tapasztó, Levente/0000-0002-9377-8465} } @article{MTMT:2981979, title = {Point contacts in encapsulated graphene}, url = {https://m2.mtmt.hu/api/publication/2981979}, author = {Handschin, Clevin and Fülöp, Bálint and Makk, Péter and Blanter, Sofya and Weiss, Markus and Watanabe, Kenji and Taniguchi, Takashi and Csonka, Szabolcs and Schönenberger, Christian}, doi = {10.1063/1.4935032}, journal-iso = {APPL PHYS LETT}, journal = {APPLIED PHYSICS LETTERS}, volume = {107}, unique-id = {2981979}, issn = {0003-6951}, year = {2015}, eissn = {1077-3118}, orcid-numbers = {Fülöp, Bálint/0000-0001-6853-2642} }