TY - JOUR AU - Grüner, György AU - Mezei, Ferenc AU - Holczer, Károly AU - Mihály, László AU - Forró, László TI - Zawadowski Alfréd kisugárzása. A születésnapi ünnepségre hazalátogató kísérleti fizikusok írásai JF - FIZIKAI SZEMLE J2 - FIZIKAI SZEMLE VL - 66 PY - 2016 IS - 5 SP - 151 EP - 154 PG - 4 SN - 0015-3257 UR - https://m2.mtmt.hu/api/publication/3084481 ID - 3084481 LA - Hungarian DB - MTMT ER - TY - BOOK AU - Mihály, László AU - Michael, C Martin TI - Solid State Physics: Problems and Solutions ET - 0 PB - Wiley-VCH Verlag CY - New York, New York PY - 2009 SP - 315 SN - 9783527408559 UR - https://m2.mtmt.hu/api/publication/2756246 ID - 2756246 N1 - Second (extended) edition: see Amazon First edition (1996): see BME OMIKK, Library of Congress LA - English DB - MTMT ER - TY - JOUR AU - Carr, GL AU - Smith, RJ AU - Mihály, László AU - Zhang, H AU - Reitze, DH AU - Tanner, DB TI - High-resolution far-infrared spectroscopy at NSLS beamline U12IR JF - INFRARED PHYSICS & TECHNOLOGY J2 - INFRARED PHYS TECHN VL - 51 PY - 2008 IS - 5 SP - 404 EP - 406 PG - 3 SN - 1350-4495 UR - https://m2.mtmt.hu/api/publication/2756277 ID - 2756277 AB - 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. LA - English DB - MTMT ER - TY - JOUR AU - Jánossy, András AU - Nagy, Kálmán AU - Fehér, Titusz AU - Mihály, László AU - Erb, A TI - Search for stripes in antiferromagnetic lightly hole-doped YBa2Cu3O6: An electron spin resonance and infrared transmission study JF - PHYSICAL REVIEW B J2 - PHYS REV B VL - 75 PY - 2007 IS - 2 SN - 2469-9950 DO - 10.1103/PhysRevB.75.024501 UR - https://m2.mtmt.hu/api/publication/1117870 ID - 1117870 N1 - Budapest University of Technology and Economics, Institute of Physics, Hungarian Academy of Sciences, P.O. Box 91, H-1521 Budapest, Hungary Institute of Physics of Complex Matter, EPFL, CH-1015 Lausanne, Switzerland Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, United States Walther Meissner Institut, Bayerische Akademie der Wissenschaften, D-85748 Garching, Germany Cited By :3 Export Date: 2 January 2024 CODEN: PRBMD Correspondence Address: Jánossy, A.; Budapest University of Technology and Economics, P.O. Box 91, H-1521 Budapest, Hungary; email: atj@szfki.hu AB - 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. LA - English DB - MTMT ER - TY - JOUR AU - de Brion, S AU - Darie, C AU - Holzapfel, M AU - Talbayev, D AU - Mihály, László AU - Simon, Ferenc AU - Jánossy, András AU - Chouteau, G TI - Spin excitations in the antiferromagnet NaNiO2 JF - PHYSICAL REVIEW B J2 - PHYS REV B VL - 75 PY - 2007 IS - 9 PG - 10 SN - 2469-9950 DO - 10.1103/PhysRevB.75.094402 UR - https://m2.mtmt.hu/api/publication/117139 ID - 117139 LA - English DB - MTMT ER - TY - JOUR AU - Miklossy, Judit AU - Mihály, László TI - Beta-amyloid deposition and Alzheimer's type changes induced by Borrelia spirochetes JF - NEUROBIOLOGY OF AGING: AGE-RELATED PHENOMENA NEURODEGENERATION AND NEUROPATHOLOGY J2 - NEUROBIOL AGING VL - 27 PY - 2006 IS - 2 SP - 228 EP - 236 PG - 9 SN - 0197-4580 UR - https://m2.mtmt.hu/api/publication/2756281 ID - 2756281 AB - 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. LA - English DB - MTMT ER - TY - JOUR AU - Liu, HL AU - Quijada, M AU - Romero, DB AU - Tanner, DB AU - Zibold, A AU - Carr, GL AU - Berger, H AU - Forro, L AU - Mihály, László AU - Cao, G AU - O, BH AU - Markert, JT AU - Rice, JP AU - Burns, MJ AU - Delin, KA TI - Drude behavior in the far-infrared conductivity of cuprate superconductors JF - ANNALEN DER PHYSIK J2 - ANN PHYS-BERLIN VL - 15 PY - 2006 IS - 7-8 SP - 606 EP - 618 PG - 13 SN - 0003-3804 DO - 10.1002/andp.200510205 UR - https://m2.mtmt.hu/api/publication/2756280 ID - 2756280 N1 - CODEN: ANPYA AB - 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. LA - English DB - MTMT ER - TY - JOUR AU - Koller, D AU - Ediss, GA AU - Mihály, László AU - Carr, GL TI - Infrared measurements of possible IR filter materials JF - INTERNATIONAL JOURNAL OF INFRARED AND MILLIMETER WAVES J2 - INT J INFRARED MILLI VL - 27 PY - 2006 IS - 6 SP - 835 EP - 846 PG - 12 SN - 0195-9271 UR - https://m2.mtmt.hu/api/publication/2756279 ID - 2756279 N1 - Author.identifier.kozid = 08032 AB - 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. LA - English DB - MTMT ER - TY - JOUR AU - Mihály, László AU - Dóra, Balázs AU - Ványolos, András AU - Berger, H AU - Forro, L TI - Spin-lattice interaction in the quasi-one-dimensional helimagnet LiCu2O2 JF - PHYSICAL REVIEW LETTERS J2 - PHYS REV LETT VL - 97 PY - 2006 IS - 6 PG - 4 SN - 0031-9007 DO - 10.1103/PhysRevLett.97.067206 UR - https://m2.mtmt.hu/api/publication/2580719 ID - 2580719 AB - 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. LA - English DB - MTMT ER - TY - JOUR AU - Kézsmárki, István AU - Mihály, György AU - Gaal, R AU - Barisic, N AU - Akrap, A AU - Berger, H AU - Forro, L AU - Homes, CC AU - Mihály, László TI - Separation of orbital contributions to the optical conductivity of BaVS3 JF - PHYSICAL REVIEW LETTERS J2 - PHYS REV LETT VL - 96 PY - 2006 IS - 18 PG - 4 SN - 0031-9007 DO - 10.1103/PhysRevLett.96.186402 UR - https://m2.mtmt.hu/api/publication/2111177 ID - 2111177 LA - English DB - MTMT ER -