@article{MTMT:33096845, title = {Parallel InAs nanowires for Cooper pair splitters with Coulomb repulsion}, url = {https://m2.mtmt.hu/api/publication/33096845}, author = {Kürtössy, Olivér and Scherübl, Zoltán and Fülöp, Gergő and Lukács, István Endre and Kanne, Thomas and Nygard, Jesper and Makk, Péter and Csonka, Szabolcs}, doi = {10.1038/s41535-022-00497-9}, journal-iso = {NPJ QUANTUM MATER}, journal = {NPJ QUANTUM MATERIALS}, volume = {7}, unique-id = {33096845}, abstract = {Hybrid nanostructures consisting of two parallel InAs nanowires connected by an epitaxially grown superconductor (SC) shell recently became available. Due to the defect-free SC-semiconductor interface and the two quasi-one-dimensional channels being close by, these platforms can be utilized to spatially separate entangled pairs of electrons by using quantum dots (QD) in the so-called Cooper pair splitting (CPS) process. The minimized distance between the QDs overcomes the limitations of single-wire-based geometries and can boost the splitting efficiency. Here we investigate CPS in such a device where strong inter-dot Coulomb repulsion is also present and studied thoroughly. We analyze theoretically the slight reduction of the CPS efficiency imposed by the Coulomb interaction and compare it to the experiments. Despite the competition between crossed Andreev reflection (CAR) and inter-wire capacitance, a significant CPS signal is observed indicating the dominance of the superconducting coupling. Our results demonstrate that the application of parallel InAs nanowires with epitaxial SC is a promising route for the realization of parafermionic states relying on enhanced CAR between the wires.}, keywords = {SUPERCONDUCTOR; Materials Science, Multidisciplinary; Physics, Applied; Quantum Science & Technology}, year = {2022}, eissn = {2397-4648}, orcid-numbers = {Lukács, István Endre/0000-0002-4985-4475} } @article{MTMT:34539543, title = {Comparative study of carbon nanosphere and carbon nanopowder on viscosity and thermal conductivity of nanofluids}, url = {https://m2.mtmt.hu/api/publication/34539543}, author = {Le Ba, Thong and Bohus, Marcell and Lukács, István Endre and Wongwises, S. and Gróf, Gyula István and Hernádi, Klára and Szilágyi, Imre Miklós}, doi = {10.3390/nano11030608}, journal-iso = {NANOMATERIALS-BASEL}, journal = {NANOMATERIALS}, volume = {11}, unique-id = {34539543}, year = {2021}, eissn = {2079-4991}, orcid-numbers = {Lukács, István Endre/0000-0002-4985-4475; Gróf, Gyula István/0000-0002-6359-768X; Hernádi, Klára/0000-0001-9419-689X} } @article{MTMT:32541140, title = {Gate-Controlled Supercurrent in Epitaxial Al/InAs Nanowires}, url = {https://m2.mtmt.hu/api/publication/32541140}, author = {Elalaily, Tosson and Kürtössy, Olivér and Scherübl, Zoltán and Berke, Martin and Fülöp, Gergő and Lukács, István Endre and Kanne, Thomas and Nygård, Jesper and Watanabe, Kenji and Taniguchi, Takashi and Makk, Péter and Csonka, Szabolcs}, doi = {10.1021/acs.nanolett.1c03493}, journal-iso = {NANO LETT}, journal = {NANO LETTERS}, volume = {21}, unique-id = {32541140}, issn = {1530-6984}, year = {2021}, eissn = {1530-6992}, pages = {9684-9690}, orcid-numbers = {Lukács, István Endre/0000-0002-4985-4475; Watanabe, Kenji/0000-0003-3701-8119; Taniguchi, Takashi/0000-0002-1467-3105; Makk, Péter/0000-0001-7637-4672} } @article{MTMT:32242695, title = {Andreev Molecule in Parallel InAs Nanowires}, url = {https://m2.mtmt.hu/api/publication/32242695}, author = {Kürtössy, Olivér and Scherübl, Zoltán and Fülöp, Gergő and Lukács, István Endre and Kanne, Thomas and Nygård, Jesper and Makk, Péter and Csonka, Szabolcs}, doi = {10.1021/acs.nanolett.1c01956}, journal-iso = {NANO LETT}, journal = {NANO LETTERS}, volume = {21}, unique-id = {32242695}, issn = {1530-6984}, year = {2021}, eissn = {1530-6992}, pages = {7929-7937}, orcid-numbers = {Lukács, István Endre/0000-0002-4985-4475; Makk, Péter/0000-0001-7637-4672} } @article{MTMT:31842452, title = {Preparation of TiO2/WO3/C/N Composite Nanofibers by Electrospinning Using Precursors Soluble in Water and Their Photocatalytic Activity in Visible Light}, url = {https://m2.mtmt.hu/api/publication/31842452}, author = {Odhiambo, Vincent Otieno and Mustafa, Chra Rasool M. and Le Ba, Thong and Kónya, Zoltán and Cserháti, Csaba and Erdélyi, Zoltán and Lukács, István Endre and Szilágyi, Imre Miklós}, doi = {10.3390/nano11020351}, journal-iso = {NANOMATERIALS-BASEL}, journal = {NANOMATERIALS}, volume = {11}, unique-id = {31842452}, abstract = {Extending the absorption range of TiO2 nanofibers to visible light is a great improvement of the photocatalytic property of TiO2. In this study, TiO2/WO3/C/N nanofibers were prepared by electrospinning using precursors soluble in water then annealing in argon. Titanium(IV) bis(ammonium lactato)dihydroxide (TiBALDH) and ammonium metatungstate (AMT) were used as the precursor for TiO2 and WO3 respectively. Different volume ratios of the precursors were added to a solution of PVP before electrospinning. The fibers were studied by XPS, SEM-EDX, TEM, FTIR, XRD, Raman spectroscopy and UV–VIS diffuse reflectance spectroscopy (DRS). The photocatalytic degradation of methylene blue by the fibers in visible light was investigated. The fibers had anatase TiO2 and monoclinic WO3. Based on UV–VIS DRS and Kubelka-Munk function the fibers could absorb visible light. Moreover, 100% TiBALDH had an indirect band gap of 2.9 eV, and the band gap decreased with increase in AMT, i.e., for 0% TiBALDH, band gap was 2.4 eV. The fibers degraded methylene blue dye in visible light, and 90% TiBALDH had the highest photocatalytic activity, i.e., it degraded 40% of the dye after 240 min.}, year = {2021}, eissn = {2079-4991}, orcid-numbers = {Odhiambo, Vincent Otieno/0000-0002-9638-6635; Mustafa, Chra Rasool M./0000-0002-4127-7634; Le Ba, Thong/0000-0003-1203-8914; Kónya, Zoltán/0000-0002-9406-8596; Cserháti, Csaba/0000-0003-1312-4961; Lukács, István Endre/0000-0002-4985-4475; Szilágyi, Imre Miklós/0000-0002-5938-8543} } @article{MTMT:31385128, title = {Experimental investigation of rheological properties and thermal conductivity of SiO2–P25 TiO2 hybrid nanofluids}, url = {https://m2.mtmt.hu/api/publication/31385128}, author = {Le Ba, Thong and Várady, Zalán István and Lukács, István Endre and Molnár, János and Soósné Balczár, Ida Anna and Wongwises, Somchai and Szilágyi, Imre Miklós}, doi = {10.1007/s10973-020-10022-4}, journal-iso = {J THERM ANAL CALORIM}, journal = {JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY}, volume = {146}, unique-id = {31385128}, issn = {1388-6150}, year = {2021}, eissn = {1572-8943}, pages = {493-507}, orcid-numbers = {Lukács, István Endre/0000-0002-4985-4475} } @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:31701894, title = {Probing Proximity-Induced Superconductivity in InAs Nanowires Using Built-In Barriers}, url = {https://m2.mtmt.hu/api/publication/31701894}, author = {Elalaily, Tosson and Kürtössy, Olivér and Zannier, Valentina and Scherübl, Zoltán and Lukács, István Endre and Srivastava, Pawan and Rossi, Francesca and Sorba, Lucia and Csonka, Szabolcs and Makk, Péter}, doi = {10.1103/PhysRevApplied.14.044002}, journal-iso = {PHYS REV APPL}, journal = {PHYSICAL REVIEW APPLIED}, volume = {14}, unique-id = {31701894}, issn = {2331-7019}, abstract = {Bound states in superconductor-nanowire hybrid devices play a central role, carrying information on ground-state properties (Shiba or Andreev states) or on the topological properties of the system (Majorana states). The spectroscopy of such bound states relies on the formation of well-defined tunnel barriers, usually defined by gate electrodes, which results in smooth tunnel barriers. Here we used thin InP segments embedded into InAs nanowire during the growth process to form a sharp built-in tunnel barrier. Gate dependence and thermal-activation measurements are used to confirm the presence and estimate the height of this barrier. By coupling these wires to superconducting electrodes we investigate the gate voltage dependence of the induced gap in the nanowire segment, which we can understand using a simple model based on Andreev bound states. Our results show that these built-in barriers are promising as future spectroscopic tools.}, year = {2020}, eissn = {2331-7019}, orcid-numbers = {Lukács, István Endre/0000-0002-4985-4475; Rossi, Francesca/0000-0003-1773-2542} } @article{MTMT:31639212, title = {A Novel Experimental Study on the Rheological Properties and Thermal Conductivity of Halloysite Nanofluids}, url = {https://m2.mtmt.hu/api/publication/31639212}, author = {Le Ba, Thong and Alkurdi, Ahmed Qani and Lukács, István Endre and Molnár, János and Wongwises, Somchai and Gróf, Gyula István and Szilágyi, Imre Miklós}, doi = {10.3390/nano10091834}, journal-iso = {NANOMATERIALS-BASEL}, journal = {NANOMATERIALS}, volume = {10}, unique-id = {31639212}, year = {2020}, eissn = {2079-4991}, orcid-numbers = {Lukács, István Endre/0000-0002-4985-4475; Gróf, Gyula István/0000-0002-6359-768X} } @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} }