@article{MTMT:34801218,
	title = {Incidence of the Brownian Relaxation Process on the Magnetic Properties of Ferrofluids},
	url = {https://m2.mtmt.hu/api/publication/34801218},
	author = {Vajtai, Lili and Nemes, Norbert Marcel and Morales, Maria del Puerto and Molnár, Kolos and Pinke, Balazs Gabor and Simon, Ferenc},
	doi = {10.3390/nano14070634},
	journal-iso = {NANOMATERIALS-BASEL},
	journal = {NANOMATERIALS},
	volume = {14},
	unique-id = {34801218},
	abstract = {Ferrofluids containing magnetic nanoparticles represent a special class of magnetic materials due to the added freedom of particle tumbling in the fluids. We studied this process, known as Brownian relaxation, and its effect on the magnetic properties of ferrofluids with controlled magnetite nanoparticle sizes. For small nanoparticles (below 10 nm diameter), the Neel process is expected to dominate the magnetic response, whereas for larger particles, Brownian relaxation becomes important. Temperature- and magnetic-field-dependent magnetization studies, differential scanning calorimetry, and AC susceptibility measurements were carried out for 6 and 13.5 nm diameter magnetite nanoparticles suspended in water. We identify clear fingerprints of Brownian relaxation for the sample of large-diameter nanoparticles as both magnetic and thermal hysteresis develop at the water freezing temperature, whereas the samples of small-diameter nanoparticles remain hysteresis-free down to the magnetic blocking temperature. This is supported by the temperature-dependent AC susceptibility measurements: above 273 K, the data show a low-frequency Debye peak, which is characteristic of Brownian relaxation. This peak vanishes below 273 K.},
	keywords = {NANOPARTICLES; Anisotropy; HYPERTHERMIA; Ferrofluid; Materials Science, Multidisciplinary; Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; MAGNETOMETRY; dipole interactions; Néel relaxation; Néel relaxation; Brownian relaxation},
	year = {2024},
	eissn = {2079-4991},
	orcid-numbers = {Molnár, Kolos/0000-0002-9331-4652}
}

@article{MTMT:34742349,
	title = {Az elektromágneses sugárzás távolhatása, avagy mire jó a Poynting-vektor; illetve tudunk-e a fénynél gyorsabban haladó jeleket előállítani?},
	url = {https://m2.mtmt.hu/api/publication/34742349},
	author = {Fürjes, Bálint and Dóra, Balázs and Simon, Ferenc},
	journal-iso = {FIZIKAI SZEMLE},
	journal = {FIZIKAI SZEMLE},
	volume = {74},
	unique-id = {34742349},
	issn = {0015-3257},
	year = {2024},
	pages = {102-106}
}

@article{MTMT:34238621,
	title = {A folyamatok megfordíthatatlansága és a spinechó},
	url = {https://m2.mtmt.hu/api/publication/34238621},
	author = {Kucsera, Robin and Simon, Ferenc},
	journal-iso = {FIZIKAI SZEMLE},
	journal = {FIZIKAI SZEMLE},
	volume = {73},
	unique-id = {34238621},
	issn = {0015-3257},
	year = {2023},
	pages = {361-364}
}

@article{MTMT:34192915,
	title = {DNA mismatch repair protects the genome from oxygen-induced replicative mutagenesis},
	url = {https://m2.mtmt.hu/api/publication/34192915},
	author = {Lózsa, Rita Bernadett and Németh, Eszter and Gervai, Judit Zsuzsanna and Márkus, Bence Gábor and Kollarics, Sándor and Gyüre, Zsolt Tamás and Tóth, Judit and Simon, Ferenc and Szüts, Dávid},
	doi = {10.1093/nar/gkad775},
	journal-iso = {NUCLEIC ACIDS RES},
	journal = {NUCLEIC ACIDS RESEARCH},
	volume = {51},
	unique-id = {34192915},
	issn = {0305-1048},
	abstract = {DNA mismatch repair (MMR) corrects mismatched DNA bases arising from multiple sources including polymerase errors and base damage. By detecting spontaneous mutagenesis using whole genome sequencing of cultured MMR deficient human cell lines, we show that a primary role of MMR is the repair of oxygen-induced mismatches. We found an approximately twofold higher mutation rate in MSH6 deficient DLD-1 cells or MHL1 deficient HCT116 cells exposed to atmospheric conditions as opposed to mild hypoxia, which correlated with oxidant levels measured using electron paramagnetic resonance spectroscopy. The oxygen-induced mutations were dominated by T to C base substitutions and single T deletions found primarily on the lagging strand. A broad sequence context preference, dependence on replication timing and a lack of transcriptional strand bias further suggested that oxygen-induced mutations arise from polymerase errors rather than oxidative base damage. We defined separate low and high oxygen-specific MMR deficiency mutation signatures common to the two cell lines and showed that the effect of oxygen is observable in MMR deficient cancer genomes, where it best correlates with the contribution of mutation signature SBS21. Our results imply that MMR corrects oxygen-induced genomic mismatches introduced by a replicative process in proliferating cells. Graphical Abstract},
	keywords = {CELLS; NUCLEOTIDE; HYPOXIA; 8-OXOGUANINE; BYPASS; Mutational signatures; high-fidelity; Thymine glycol},
	year = {2023},
	eissn = {1362-4962},
	pages = {11040-11055},
	orcid-numbers = {Lózsa, Rita Bernadett/0000-0001-5957-906X; Márkus, Bence Gábor/0000-0003-1472-0482; Tóth, Judit/0000-0002-0965-046X}
}

@article{MTMT:34083058,
	title = {Formation of Paramagnetic Defects in the Synthesis of Silicon Carbide},
	url = {https://m2.mtmt.hu/api/publication/34083058},
	author = {Mukesh, Naina and Márkus, Bence Gábor and Jegenyés, Nikoletta and Bortel, Gábor and Morais Bezerra, Sarah and Simon, Ferenc and Beke, Dávid and Gali, Ádám},
	doi = {10.3390/mi14081517},
	journal-iso = {MICROMACHINES-BASEL},
	journal = {MICROMACHINES},
	volume = {14},
	unique-id = {34083058},
	abstract = {Silicon carbide (SiC) is a very promising platform for quantum information processing, as it can host room temperature solid state defect quantum bits. These room temperature quantum bits are realized by paramagnetic silicon vacancy and divacancy defects in SiC that are typically introduced by irradiation techniques. However, irradiation techniques often introduce unwanted defects near the target quantum bit defects that can be detrimental for the operation of quantum bits. Here, we demonstrate that by adding aluminum precursor to the silicon and carbon sources, quantum bit defects are created in the synthesis of SiC without any post treatments. We optimized the synthesis parameters to maximize the paramagnetic defect concentrations—including already established defect quantum bits—monitored by electron spin resonance spectroscopy.},
	keywords = {PHOTOLUMINESCENCE; electron paramagnetic resonance (EPR); solid state quantum defects},
	year = {2023},
	eissn = {2072-666X},
	orcid-numbers = {Márkus, Bence Gábor/0000-0003-1472-0482; Gali, Ádám/0000-0002-3339-5470}
}

@article{MTMT:34031540,
	title = {Fraktálok zenéje – avagy érdekes jelalakok oszcilloszkópon},
	url = {https://m2.mtmt.hu/api/publication/34031540},
	author = {Zhang, Yu Jie and Simon, Ferenc},
	journal-iso = {FIZIKAI SZEMLE},
	journal = {FIZIKAI SZEMLE},
	volume = {73},
	unique-id = {34031540},
	issn = {0015-3257},
	year = {2023},
	pages = {137-140}
}

@article{MTMT:33831368,
	title = {Ultralong 100 ns spin relaxation time in graphite at room temperature},
	url = {https://m2.mtmt.hu/api/publication/33831368},
	author = {Márkus, Bence Gábor and Gmitra, M. and Dóra, Balázs and Csősz, Gábor and Fehér, Titusz and Szirmai, P. and Náfrádi, B. and Zólyomi, Viktor and Forró, L. and Fabian, J. and Simon, Ferenc},
	doi = {10.1038/s41467-023-38288-w},
	journal-iso = {NAT COMMUN},
	journal = {NATURE COMMUNICATIONS},
	volume = {14},
	unique-id = {33831368},
	issn = {2041-1723},
	abstract = {Graphite has been intensively studied, yet its electron spins dynamics remains an unresolved problem even 70 years after the first experiments. The central quantities, the longitudinal ( T 1 ) and transverse ( T 2 ) relaxation times were postulated to be equal, mirroring standard metals, but T 1 has never been measured for graphite. Here, based on a detailed band structure calculation including spin-orbit coupling, we predict an unexpected behavior of the relaxation times. We find, based on saturation ESR measurements, that T 1 is markedly different from T 2 . Spins injected with perpendicular polarization with respect to the graphene plane have an extraordinarily long lifetime of 100 ns at room temperature. This is ten times more than in the best graphene samples. The spin diffusion length across graphite planes is thus expected to be ultralong, on the scale of ~ 70  μ m, suggesting that thin films of graphite — or multilayer AB graphene stacks — can be excellent platforms for spintronics applications compatible with 2D van der Waals technologies. Finally, we provide a qualitative account of the observed spin relaxation based on the anisotropic spin admixture of the Bloch states in graphite obtained from density functional theory calculations.},
	year = {2023},
	eissn = {2041-1723},
	orcid-numbers = {Márkus, Bence Gábor/0000-0003-1472-0482; Náfrádi, B./0000-0001-9543-2970; Fabian, J./0000-0002-3009-4525}
}

@article{MTMT:33334257,
	title = {A folyamatok megfordíthatatlansága és a Loschmidt-paradoxon},
	url = {https://m2.mtmt.hu/api/publication/33334257},
	author = {Zhang, Yu Jie and Simon, Ferenc},
	journal-iso = {FIZIKAI SZEMLE},
	journal = {FIZIKAI SZEMLE},
	volume = {72},
	unique-id = {33334257},
	issn = {0015-3257},
	year = {2022},
	pages = {331-335}
}

@article{MTMT:33287714,
	title = {High-frequency characterization of Fe-based nanocrystalline cores},
	url = {https://m2.mtmt.hu/api/publication/33287714},
	author = {Zámborszky, F. and Gyüre-Garami, B. and Jánosi, B. and Vajtai, L. and Hegyessy, L. and Gresits, Iván and Simon, Ferenc},
	doi = {10.1016/j.jmmm.2022.170027},
	journal-iso = {J MAGN MAGN MATER},
	journal = {JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS},
	volume = {564},
	unique-id = {33287714},
	issn = {0304-8853},
	year = {2022},
	eissn = {1873-4766}
}

@article{MTMT:33068961,
	title = {Ultralong Charge Carrier Recombination Time in Methylammonium Lead Halide Perovskites},
	url = {https://m2.mtmt.hu/api/publication/33068961},
	author = {Bojtor, András and Kollarics, Sándor and Márkus, Bence Gábor and Sienkiewicz, A. and Kollár, M. and Forró, L. and Simon, Ferenc},
	doi = {10.1021/acsphotonics.2c00687},
	journal-iso = {ACS PHOTONICS},
	journal = {ACS PHOTONICS},
	volume = {9},
	unique-id = {33068961},
	issn = {2330-4022},
	abstract = {Due to their exceptional photovoltaic properties, metal halide perovskites (MHPs) are extensively studied for their potential applications in solar cells. In recent years, the power conversion efficiencies of MHPs-based solar cells rapidly increased from the initial few % toward more than 25% for single-junction devices. Therefore, also taking into account their low costs and ease of manufacturing, MHPs-based solar cells have become the fastest-advancing photovoltaic technology. In this regard, much of the recent work has been dominated by absorber materials based on methylammonium MHPs, such as MAPbX3, where MA = CH3NH3 and X = Cl, Br, and I. Here, we present the results of contactless time-resolved photoconductivity measurements in an exceptionally wide range of temperatures of 4 to 290 K that were performed for the various crystalline forms of the three parent MAPbX3, that is, MAPbCl3, MAPbBr3, and MAPbI3. This approach was made possible by the use of a high quality factor (Q) microwave resonator, which cooperated with a commercially available microwave bridge equipped with an automatic frequency control (AFC) and a helium gas-flow cryostat. The structural phase transitions from orthorhombic to tetragonal are found to drastically affect the transient photoconductivity signal, and we also observe ultralong charge carrier recombination times approaching 70 its at low temperatures. The difference caused by morphology on the photophysical properties is supported by a marked difference between rapidly cooled (quenched) and slowly cooled samples. The sensitive technique also allowed to observe differences between samples with different morphologies and crystallite sizes.},
	year = {2022},
	pages = {3341-3350},
	orcid-numbers = {Márkus, Bence Gábor/0000-0003-1472-0482}
}