TY - JOUR AU - Biró, László Péter AU - Tapasztó, Levente AU - Nemes Incze, Péter TI - Pásztázószondás módszerek az MFA-ban JF - FIZIKAI SZEMLE J2 - FIZIKAI SZEMLE VL - 74 PY - 2024 IS - 3 SP - 74 EP - 79 PG - 6 SN - 0015-3257 UR - https://m2.mtmt.hu/api/publication/34727538 ID - 34727538 LA - Hungarian 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 - 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 - Pálinkás, András AU - Kálvin, György AU - Vancsó, Péter AU - Kandrai, Konrád AU - Szendrő, Márton AU - Németh, Gergely AU - Németh, Miklós AU - Pekker, Áron AU - Pap, József Sándor AU - Petrik, Péter AU - Kamarás, Katalin AU - Tapasztó, Levente AU - Nemes Incze, Péter TI - The composition and structure of the ubiquitous hydrocarbon contamination on van der Waals materials JF - NATURE COMMUNICATIONS J2 - NAT COMMUN VL - 13 PY - 2022 IS - 1 PG - 10 SN - 2041-1723 DO - 10.1038/s41467-022-34641-7 UR - https://m2.mtmt.hu/api/publication/33226497 ID - 33226497 AB - The behavior of single layer van der Waals (vdW) materials is profoundly influenced by the immediate atomic environment at their surface, a prime example being the myriad of emergent properties in artificial heterostructures. Equally significant are adsorbates deposited onto their surface from ambient. While vdW interfaces are well understood, our knowledge regarding atmospheric contamination is severely limited. Here we show that the common ambient contamination on the surface of: graphene, graphite, hBN and MoS2 is composed of a self-organized molecular layer, which forms during a few days of ambient exposure. Using low-temperature STM measurements we image the atomic structure of this adlayer and in combination with infrared spectroscopy identify the contaminant molecules as normal alkanes with lengths of 20-26 carbon atoms. Through its ability to self-organize, the alkane layer displaces the manifold other airborne contaminant species, capping the surface of vdW materials and possibly dominating their interaction with the environment. LA - English DB - MTMT ER - TY - CHAP AU - Márk, Géza István AU - Vancsó, Péter AU - Nemes Incze, Péter ED - Alexander, Obraztsov ED - Yuri, Svirko TI - Transport properties of TMDC materials T2 - Eighth International Workshop Nanocarbon Photonics and Optoelectronics PB - University of Eastern Finland CY - Polvijärvi SN - 9789526145860 PY - 2022 SP - 19 EP - 19 PG - 1 UR - https://m2.mtmt.hu/api/publication/33111153 ID - 33111153 LA - English DB - MTMT ER - TY - GEN AU - Dobrik, Gergely AU - Nemes Incze, Péter AU - Majérus, Bruno AU - Süle, Péter AU - Vancsó, Péter AU - Piszter, Gábor AU - Menyhárd, Miklós AU - Kalas, Benjamin AU - Petrik, Péter AU - Henrard, Luc AU - Tapasztó, Levente TI - Visible-frequency graphene plasmons PY - 2022 PG - 1 UR - https://m2.mtmt.hu/api/publication/33111090 ID - 33111090 LA - English DB - MTMT ER - TY - JOUR AU - Hagymási, Imre AU - Mohd, Isa M.S. AU - Tajkov, Zoltán AU - Márity, K. AU - Oroszlány, László AU - Koltai, János AU - Al-Assaf, Assem Mustafa Abd-Alrhman AU - Kun, Péter AU - Kandrai, Konrád AU - Pálinkás, András AU - Vancsó, Péter AU - Tapasztó, Levente AU - Nemes Incze, Péter TI - Observation of competing, correlated ground states in the flat band of rhombohedral graphite JF - SCIENCE ADVANCES J2 - SCI ADV VL - 8 PY - 2022 IS - 35 PG - 9 SN - 2375-2548 DO - 10.1126/sciadv.abo6879 UR - https://m2.mtmt.hu/api/publication/33090541 ID - 33090541 LA - English DB - MTMT ER - TY - JOUR AU - Tajkov, Zoltán AU - Nagy, Dániel AU - Kandrai, Konrád AU - Koltai, János AU - Oroszlány, László AU - Süle, Péter AU - Horváth, Zsolt Endre AU - Vancsó, Péter AU - Tapasztó, Levente AU - Nemes Incze, Péter TI - Revealing the topological phase diagram of ZrTe5 using the complex strain fields of microbubbles JF - NPJ COMPUTATIONAL MATERIALS J2 - NPJ COMPUT MATER VL - 8 PY - 2022 IS - 1 PG - 7 SN - 2057-3960 DO - 10.1038/s41524-022-00854-z UR - https://m2.mtmt.hu/api/publication/33068873 ID - 33068873 AB - Topological materials host robust properties, unaffected by microscopic perturbations, owing to the global topological properties of the bulk electron system. Materials in which the topological invariant can be changed by easily tuning external parameters are especially sought after. Zirconium pentatelluride (ZrTe5) is one of a few experimentally available materials that reside close to the boundary of a topological phase transition, allowing the switching of its invariant by mechanical strain. Here, we unambiguously identify a topological insulator-metal transition as a function of strain, by a combination of ab initio calculations and direct measurements of the local charge density. Our model quantitatively describes the response to complex strain patterns found in bubbles of few layer ZrTe5 without fitting parameters, reproducing the mechanical deformation-dependent closing of the band gap observed using scanning tunneling microscopy. We calculate the topological phase diagram of ZrTe5 and identify the phase at equilibrium, enabling the design of device architectures, which exploit the topological switching characteristics of the system. LA - English DB - MTMT ER - TY - GEN AU - Tapasztó, Levente AU - Dobrik, Gergely AU - Nemes Incze, Péter AU - Majerus, Bruno AU - Süle, Péter AU - Vancsó, Péter AU - Henrard, Luc TI - Observation of visible-frequency graphene plasmons in nanocorrugated graphene PY - 2022 PG - 1 UR - https://m2.mtmt.hu/api/publication/32816824 ID - 32816824 LA - English DB - MTMT ER - TY - JOUR AU - Dobrik, Gergely AU - Nemes Incze, Péter AU - Majerus, B AU - Süle, Péter AU - Vancsó, Péter AU - Piszter, Gábor AU - Menyhárd, Miklós AU - Kalas, Benjamin AU - Petrik, Péter AU - Henrard, L AU - Tapasztó, Levente TI - Large-area nanoengineering of graphene corrugations hosting visible-frequency graphene plasmons JF - NATURE NANOTECHNOLOGY J2 - NAT NANOTECHNOL VL - 17 PY - 2022 IS - 1 SP - 61 EP - 66 PG - 6 SN - 1748-3387 DO - 10.1038/s41565-021-01007-x UR - https://m2.mtmt.hu/api/publication/32100733 ID - 32100733 LA - English DB - MTMT ER -