@article{MTMT:3084481, title = {Zawadowski Alfréd kisugárzása. A születésnapi ünnepségre hazalátogató kísérleti fizikusok írásai}, url = {https://m2.mtmt.hu/api/publication/3084481}, author = {Grüner, György and Mezei, Ferenc and Holczer, Károly and Mihály, László and Forró, László}, journal-iso = {FIZIKAI SZEMLE}, journal = {FIZIKAI SZEMLE}, volume = {66}, unique-id = {3084481}, issn = {0015-3257}, year = {2016}, pages = {151-154} } @book{MTMT:2756246, title = {Solid State Physics: Problems and Solutions}, url = {https://m2.mtmt.hu/api/publication/2756246}, isbn = {9783527408559}, author = {Mihály, László and Michael, C Martin}, publisher = {Wiley-VCH Verlag GmbH & Co. KGaA}, unique-id = {2756246}, year = {2009} } @article{MTMT:2756277, title = {High-resolution far-infrared spectroscopy at NSLS beamline U12IR}, url = {https://m2.mtmt.hu/api/publication/2756277}, author = {Carr, GL and Smith, RJ and Mihály, László and Zhang, H and Reitze, DH and Tanner, DB}, journal-iso = {INFRARED PHYS TECHN}, journal = {INFRARED PHYSICS & TECHNOLOGY}, volume = {51}, unique-id = {2756277}, issn = {1350-4495}, abstract = {A Bruker model IFS 125HR Fourier transform interferometer has been installed and its performance tested using high-brightness, far-infrared synchrotron radiation. Results of absorption measurements for the rotational modes of water vapor demonstrate a nearly 10-fold improvement in signal-to-noise when compared with the instrument's internal high-pressure Hg arc lamp source. (c) 2008 Published by Elsevier B.V.}, year = {2008}, eissn = {1879-0275}, pages = {404-406} } @article{MTMT:1117870, title = {Search for stripes in antiferromagnetic lightly hole-doped YBa2Cu3O6: An electron spin resonance and infrared transmission study}, url = {https://m2.mtmt.hu/api/publication/1117870}, author = {Jánossy, András and Nagy, Kálmán and Fehér, Titusz and Mihály, László and Erb, A}, doi = {10.1103/PhysRevB.75.024501}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {75}, unique-id = {1117870}, issn = {2469-9950}, abstract = {We present a series of electron spin resonance (ESR) and infrared transmission experiments in antiferromagnetic (AF), lightly hole-doped YBa2Cu3O6 in search for the effect of a spatially inhomogeneous ground state on the magnetic and electric properties. Crystal compositions were CaxGdyY1-x-yBa2Cu3O6 with x=0, 0.008, 0.02, and 0.03 and y approximate to 0.01. Gd3+ ESR satellites from sites with first-neighbor Ca atoms show that holes are not preferentially localized at low temperatures in the vicinity of Ca dopants. We mapped by multifrequency Gd3+ ESR the AF domain structure as a function of hole concentration, temperature, and magnetic fields up to 8 T. We attribute the hole-doping-induced rotation of the magnetic easy axis from collateral to diagonal (with respect to the tetragonal CuO2 lattice) to the pinning of the AF magnetization to a static modulation or a phase-separated network of the hole density. The dominantly fourfold symmetry of pinning suggests that the hole density network has this symmetry also and is not an array of stripes. At higher temperatures the pinning to the diagonal direction becomes weak and the possibility of domain wall fluctuations is discussed. There is no magnetic field dependence and no in-plane anisotropy of the infrared transmission polarized in the CuO2 planes in an x=0.02 crystal placed in magnetic fields up to 12 T. Thus, the network of holes is rigid and is not affected by magnetic fields that are, however, strong enough to rotate the AF magnetization into a single domain.}, year = {2007}, eissn = {2469-9969} } @article{MTMT:117139, title = {Spin excitations in the antiferromagnet NaNiO2}, url = {https://m2.mtmt.hu/api/publication/117139}, author = {de Brion, S and Darie, C and Holzapfel, M and Talbayev, D and Mihály, László and Simon, Ferenc and Jánossy, András and Chouteau, G}, doi = {10.1103/PhysRevB.75.094402}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {75}, unique-id = {117139}, issn = {2469-9950}, year = {2007}, eissn = {2469-9969} } @article{MTMT:2756281, title = {Beta-amyloid deposition and Alzheimer's type changes induced by Borrelia spirochetes}, url = {https://m2.mtmt.hu/api/publication/2756281}, author = {Miklossy, Judit and Mihály, László}, journal-iso = {NEUROBIOL AGING}, journal = {NEUROBIOLOGY OF AGING: AGE-RELATED PHENOMENA NEURODEGENERATION AND NEUROPATHOLOGY}, volume = {27}, unique-id = {2756281}, issn = {0197-4580}, abstract = {The pathological hallmarks of Alzheimer's disease (AD) consist of P-amyloid plaques and neurofibrillary tangles in affected brain areas. The processes, which drive this host reaction are unknown. To determine whether an analogous host reaction to that occurring in AD could be induced by infectious agents, we exposed mammalian glial and neuronal cells in vitro to Borrelia burgdorferi spirochetes and to the inflammatory bacterial lipopolysaccharide (LPS). Morphological changes analogous to the amyloid deposits of AD brain were observed following 2-8 weeks of exposure to the spirochetes. Increased levels of beta-amyloid presursor protein (A beta PP) and hyperphosphorylated tau were also detected by Western blots of extracts of cultured cells that had been treated with spirochetes or LPS. These observations indicate that, by exposure to bacteria or to their toxic products, host responses similar in nature to those observed in AD may be induced. (C) 2005 Elsevier Inc. All rights reserved.}, year = {2006}, eissn = {1558-1497}, pages = {228-236} } @article{MTMT:2756280, title = {Drude behavior in the far-infrared conductivity of cuprate superconductors}, url = {https://m2.mtmt.hu/api/publication/2756280}, author = {Liu, HL and Quijada, M and Romero, DB and Tanner, DB and Zibold, A and Carr, GL and Berger, H and Forro, L and Mihály, László and Cao, G and O, BH and Markert, JT and Rice, JP and Burns, MJ and Delin, KA}, doi = {10.1002/andp.200510205}, journal-iso = {ANN PHYS-BERLIN}, journal = {ANNALEN DER PHYSIK}, volume = {15}, unique-id = {2756280}, issn = {0003-3804}, abstract = {When viewed at frequencies below about 8 THz (250 cm(-1); 30 meV) the ab-plane optical conductivity of the cuprate superconductors (in their normal state) is well described by a Drude model. Examples include optimally-doped YBa2Cu3O7-delta and Bi2Sr2CaCu2O8; even the underdoped phases have a Drude character to their optical conductivity. A residual Drude-like normal fluid is seen in the superconducting state in most cases; the scattering rate of this quasiparticle contribution collapses at T-c. (C) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.}, year = {2006}, eissn = {1521-3889}, pages = {606-618} } @article{MTMT:2756279, title = {Infrared measurements of possible IR filter materials}, url = {https://m2.mtmt.hu/api/publication/2756279}, author = {Koller, D and Ediss, GA and Mihály, László and Carr, GL}, journal-iso = {INT J INFRARED MILLI}, journal = {INTERNATIONAL JOURNAL OF INFRARED AND MILLIMETER WAVES}, volume = {27}, unique-id = {2756279}, issn = {0195-9271}, abstract = {A Fourier Transform Infrared Spectrometer (FTS) was used to obtain the transmission spectra of candidate materials for use as infrared (IR) filters in cryogenic receivers. The data cover the range from 50 cm(-1) (similar to 1.5 THz), well below the peak of the 300 K black body spectrum, to 5000 cm(-1) (similar to 150 THz). Z-cut quartz, Goretex, Zitex G and Zitex A, High Density Polyethylene (HDPE), Teflon (PTFE), Fluorogold and Black Polyethylene were measured. The relative effectiveness of each material as a filter is determined by integrating the transmission spectrum multiplied by the Planck distribution to obtain a normalized attenuation for the mid-IR band. Measurements at both room temperature and 8 K are compared.}, year = {2006}, eissn = {1572-9559}, pages = {835-846} } @article{MTMT:2580719, title = {Spin-lattice interaction in the quasi-one-dimensional helimagnet LiCu2O2}, url = {https://m2.mtmt.hu/api/publication/2580719}, author = {Mihály, László and Dóra, Balázs and Ványolos, András and Berger, H and Forro, L}, doi = {10.1103/PhysRevLett.97.067206}, journal-iso = {PHYS REV LETT}, journal = {PHYSICAL REVIEW LETTERS}, volume = {97}, unique-id = {2580719}, issn = {0031-9007}, abstract = {The field dependence of the electron spin resonance in a helimagnet LiCu2O2 was investigated for the first time. In the paramagnetic state, a broad resonance line was observed corresponding to a g factor of 2.3. In the critical regime, around the paramagnetic to helimagnetic phase transition the resonance broadens and shifts to higher frequencies. A narrow signal is recovered at a low temperature, corresponding to a spin gap of 1.4 meV in zero field. A comprehensive model of the magnons is presented, using exchange parameters from neutron scattering [T. Masuda Phys. Rev. B 72, 014405 (2005)] and the spin anisotropy determined here. The role of the quantum fluctuations is discussed.}, year = {2006}, eissn = {1079-7114} } @article{MTMT:2111177, title = {Separation of orbital contributions to the optical conductivity of BaVS3}, url = {https://m2.mtmt.hu/api/publication/2111177}, author = {Kézsmárki, István and Mihály, György and Gaal, R and Barisic, N and Akrap, A and Berger, H and Forro, L and Homes, CC and Mihály, László}, doi = {10.1103/PhysRevLett.96.186402}, journal-iso = {PHYS REV LETT}, journal = {PHYSICAL REVIEW LETTERS}, volume = {96}, unique-id = {2111177}, issn = {0031-9007}, year = {2006}, eissn = {1079-7114}, orcid-numbers = {Mihály, György/0000-0001-8986-3299} }