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Zeidan A, Becker P, Patel P, Schiller G, Tsai M, Lin T, Wang E, Erlander M, Cortes J. Polo-like kinase 1 (PLK1) inhibitor, onvansertib, in combination with low-dose cytarabine or decitabine in patients with relapsed/refractory acute myeloid leukaemia in phase Ib. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz251.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Kerkhoff L, Becker P. Crystal growth investigations of lithium iridate, Li 2IrO 3, and lithium ruthenates, Li 2RuO 3 and Li 3RuO 4. Acta Crystallogr A Found Adv 2019. [DOI: 10.1107/s2053273319092222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Berndtsson R, Becker P, Persson A, Aspegren H, Haghighatafshar S, Jönsson K, Larsson R, Mobini S, Mottaghi M, Nilsson J, Nordström J, Pilesjö P, Scholz M, Sternudd C, Sörensen J, Tussupova K. Drivers of changing urban flood risk: A framework for action. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 240:47-56. [PMID: 30928794 DOI: 10.1016/j.jenvman.2019.03.094] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 03/12/2019] [Accepted: 03/19/2019] [Indexed: 06/09/2023]
Abstract
This study focuses on drivers for changing urban flood risk. We suggest a framework for guiding climate change adaptation action concerning flood risk and manageability in cities. The identified key drivers of changing flood hazard and vulnerability are used to provide an overview of each driver's impact on flood risk and manageability at the city level. We find that identified drivers for urban flood risk can be grouped in three different priority areas with different time horizon. The first group has high impact but is manageable at city level. Typical drivers in this group are related to the physical environment such as decreasing permeability and unresponsive engineering. The second group of drivers is represented by public awareness and individual willingness to participate and urbanization and urban sprawl. These drivers may be important and are manageable for the cities and they involve both short-term and long-term measures. The third group of drivers is related to policy and long-term changes. This group is represented by economic growth and increasing values at risk, climate change, and increasing complexity of society. They have all high impact but low manageability. Managing these drivers needs to be done in a longer time perspective, e.g., by developing long-term policies and exchange of ideas.
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Revelli A, Moretti Sala M, Monaco G, Becker P, Bohatý L, Hermanns M, Koethe TC, Fröhlich T, Warzanowski P, Lorenz T, Streltsov SV, van Loosdrecht PHM, Khomskii DI, van den Brink J, Grüninger M. Resonant inelastic x-ray incarnation of Young's double-slit experiment. SCIENCE ADVANCES 2019; 5:eaav4020. [PMID: 30746479 PMCID: PMC6357738 DOI: 10.1126/sciadv.aav4020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 12/14/2018] [Indexed: 06/09/2023]
Abstract
Young's archetypal double-slit experiment forms the basis for modern diffraction techniques: The elastic scattering of waves yields an interference pattern that captures the real-space structure. Here, we report on an inelastic incarnation of Young's experiment and demonstrate that resonant inelastic x-ray scattering (RIXS) measures interference patterns, which reveal the symmetry and character of electronic excited states in the same way as elastic scattering does for the ground state. A prototypical example is provided by the quasi-molecular electronic structure of insulating Ba3CeIr2O9 with structural Ir dimers and strong spin-orbit coupling. The double "slits" in this resonant experiment are the highly localized core levels of the two Ir atoms within a dimer. The clear double-slit-type sinusoidal interference patterns that we observe allow us to characterize the electronic excitations, demonstrating the power of RIXS interferometry to unravel the electronic structure of solids containing, e.g., dimers, trimers, ladders, or other superstructures.
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Due B, Becker P, Crawford T. DMD CLINICAL THERAPIES I. Neuromuscul Disord 2018. [DOI: 10.1016/j.nmd.2018.06.146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Fröhlich T, Stein J, Bohatý L, Becker P, Gukasov A, Braden M. Structural and magnetic phase transitions in Cs 2[FeCl 5(H 2O)]. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:295403. [PMID: 29869988 DOI: 10.1088/1361-648x/aaca6c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The compound [Formula: see text] is magnetoelectric but not multiferroic with an erythrosiderite-related structure. We present a comprehensive investigation of its structural and antiferromagnetic phase transitions by polarization microscopy, pyroelectric measurements, x-ray diffraction and neutron diffraction. At about [Formula: see text] K, the compound changes its symmetry from Cmcm to I2/c, with a doubling of the original c-axis. This transformation is associated with rotations of the [Formula: see text] octahedra and corresponds to an ordering of the [Formula: see text] molecules and of the related [Formula: see text] bonds. A significant ferroelectric polarization can be excluded for this transition by precise pyrocurrent measurements. The antiferromagnetic phase transition occurring at [Formula: see text] results in the magnetic space group [Formula: see text], which perfectly agrees with previous measurements of the linear magnetoelectric effect and magnetization.
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Versteeg RB, Zhu J, Padmanabhan P, Boguschewski C, German R, Goedecke M, Becker P, van Loosdrecht PHM. A tunable time-resolved spontaneous Raman spectroscopy setup for probing ultrafast collective excitation and quasiparticle dynamics in quantum materials. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2018; 5:044301. [PMID: 30057929 PMCID: PMC6051769 DOI: 10.1063/1.5037784] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 06/29/2018] [Indexed: 05/12/2023]
Abstract
We present a flexible and efficient ultrafast time-resolved spontaneous Raman spectroscopy setup to study collective excitation and quasi-particle dynamics in quantum materials. The setup has a broad energy tuning range extending from the visible to near infrared spectral regions for both the pump excitation and Raman probe pulses. Additionally, the balance between energy and time-resolution can be controlled. A high light collecting efficiency is realized by high numerical aperture collection optics and a high-throughput flexible spectrometer. We demonstrate the functionality of the setup with a study of the zone-center longitudinal optical phonon and hole continuum dynamics in silicon and discuss the role of the Raman tensor in time-resolved Raman scattering. In addition, we show an evidence for unequal phonon softening rates at different high symmetry points in the Brillouin zone of silicon by means of detecting pump-induced changes in the two-phonon overtone spectrum. Demagnetization dynamics in the helimagnet Cu2OSeO3 is studied by observing softening and broadening of a magnon after photo-excitation, underlining the unique power of measuring transient dynamics in the frequency domain, and the feasibility to study phase transitions in quantum materials.
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Hess PW, Becker P, Kaplan HB, Kyprianidis A, Lee AC, Neyenhuis B, Pagano G, Richerme P, Senko C, Smith J, Tan WL, Zhang J, Monroe C. Non-thermalization in trapped atomic ion spin chains. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2017; 375:rsta.2017.0107. [PMID: 29084886 PMCID: PMC5665787 DOI: 10.1098/rsta.2017.0107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/27/2017] [Indexed: 05/27/2023]
Abstract
Linear arrays of trapped and laser-cooled atomic ions are a versatile platform for studying strongly interacting many-body quantum systems. Effective spins are encoded in long-lived electronic levels of each ion and made to interact through laser-mediated optical dipole forces. The advantages of experiments with cold trapped ions, including high spatio-temporal resolution, decoupling from the external environment and control over the system Hamiltonian, are used to measure quantum effects not always accessible in natural condensed matter samples. In this review, we highlight recent work using trapped ions to explore a variety of non-ergodic phenomena in long-range interacting spin models, effects that are heralded by the memory of out-of-equilibrium initial conditions. We observe long-lived memory in static magnetizations for quenched many-body localization and prethermalization, while memory is preserved in the periodic oscillations of a driven discrete time crystal state.This article is part of the themed issue 'Breakdown of ergodicity in quantum systems: from solids to synthetic matter'.
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Warncke K, Lickert R, Eitel S, Gloning KP, Bonifacio E, Sedlmeier EM, Becker P, Knoop J, Beyerlein A, Ziegler AG. Thymus Growth and Fetal Immune Responses in Diabetic Pregnancies. Horm Metab Res 2017; 49:892-898. [PMID: 29136677 DOI: 10.1055/s-0043-120671] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Type 1 diabetes (T1D) during pregnancy possibly affects the development of the thymus and the maturation of the immune system in the offspring. The aim of the ImmunDiabRisk study was to investigate thymus growth and maternal and fetal immune responses in pregnancies with and without T1D. The thymus circumferences of the fetuses of pregnant women with T1D (n=49) and without diabetes (n=59) were measured using ultrasound around the 29th gestational week and standardized for gestational age. Simultaneously, the frequencies and total numbers of cell markers were analyzed by flow cytometry in maternal peripheral blood, and at birth in umbilical cord blood. The standardized circumference of the thymus was similar in fetuses of mothers with and without T1D (p=0.26). We observed higher numbers of FOXP3 Tregs, memory Tregs, erythrocytes, and lymphocytes in the cord blood from T1D pregnancies (p=0.01, p=0.002, p=0.002 and p=0.02, respectively). The frequencies of CD4+/CD8+ T cells correlated positively in maternal blood and umbilical cord blood of mother-child pairs, as did the levels of neutrophils (Spearman's correlation coefficient r=0.43, p=0.02 for CD4+/CD8+ cells; r=0.46, p=0.03 for neutrophils), while no significant correlations were observed between thymus circumference and any cell markers in the child. Parts of the prenatal immune system seem to develop differently in the offspring of mothers with and without T1D. The correlation of Tregs between maternal blood and cord blood may indicate a significant cross-talk between the maternal and fetal immune system.
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Loiko P, Becker P, Bohatý L, Liebald C, Peltz M, Vernay S, Rytz D, Serres JM, Mateos X, Wang Y, Xu X, Xu J, Major A, Baranov A, Griebner U, Petrov V. Sellmeier equations, group velocity dispersion, and thermo-optic dispersion formulas for CaLnAlO 4 (Ln = Y, Gd) laser host crystals. OPTICS LETTERS 2017; 42:2275-2278. [PMID: 28614330 DOI: 10.1364/ol.42.002275] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 05/15/2017] [Indexed: 06/07/2023]
Abstract
We studied the refractive index and dispersive properties of the tetragonal rare-earth calcium aluminates, CaLnAlO4 (Ln=Gd or Y). Sellmeier equations were derived for the spectral range of 0.35-2.1 μm. The group velocity dispersion (GVD) in CaGdAlO4 is positive at ∼1 μm, 95 fs2/mm and negative at ∼2 μm, -40 fs2/mm. The GVD values for CaYAlO4 are similar. In addition, thermo-optic coefficients, dn/dT, and thermal coefficients of the optical path were determined for CaYAlO4. dn/dT is negative at ∼1 μm, dno/dT=-7.8, and dne/dT=-8.7×10-6 K-1. Thermo-optic dispersion formulas were constructed. The obtained data are of key importance to the design of high-power mode-locked oscillators at ∼1 and ∼2 μm based on such laser hosts.
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Bohatý L, Ochrombel R, Liebertz J, Becker P. Linear electrooptic effect of the monoclinic polar bismuth triborate, BiB3O6. CRYSTAL RESEARCH AND TECHNOLOGY 2016. [DOI: 10.1002/crat.201600250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Becker P, Schwebig A, Brauninger S, Bialleck H, Luxembourg B, Schulz M, Tsamadou C, Wiesneth M, Reinhardt P, Mytilineos J, Seidl C, Gattu S, Kaliakina N, Singh P, Schrezenmeier H, Seifried E, Bonig H. Healthy donor hematopoietic stem cell mobilization with biosimilar granulocyte-colony-stimulating factor: safety, efficacy, and graft performance. Transfusion 2016; 56:3055-3064. [PMID: 27633122 DOI: 10.1111/trf.13853] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 08/11/2016] [Accepted: 08/15/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND Biosimilar granulocyte-colony-stimulating factors (G-CSFs) have been available in the European Union since 2008, and Sandoz' biosimilar filgrastim was approved in the United States in March 2015 for all of the reference product's indications except acute radiation syndrome. Biosimilar G-CSFs have been largely embraced by the medical community, except for some reservations about healthy-donor stem cell mobilization, for which use outside of clinical studies was cautioned against by some members of the scientific community. STUDY DESIGN AND METHODS In a two-center safety surveillance study (National Clinical Trial NCT01766934), 245 healthy volunteer stem cell donors were enrolled. Of 244 donors who began mobilization with twice-daily Sandoz biosimilar filgrastim, 242 received a full (n = 241) or partial (n = 1) course of G-CSF and underwent apheresis. Efficacy and safety were assessed and are reported here. RESULTS Biosimilar filgrastim was accompanied by the typical G-CSF class-related adverse effects of expected frequency and severity. Median mobilization for CD34-positive stem cells was 97/µL (range, 20-347/µL); after one apheresis (91%) or two aphereses (9%) from all but three donors (1.2%), cell doses in excess of the typical 4 × 106 CD34-positive cells/kg of the recipient had been collected (range, 3-52 × 106 /kg). Biochemical and hematologic alterations were consistent with previous reports; all had normalized by the first follow-up 1 month after mobilization. Stem cell products engrafted with typical probability and kinetics for G-CSF-mobilized stem cell products. CONCLUSION These data support the use of biosimilar filgrastim for healthy-donor stem cell mobilization as safe and effective.
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Warncke K, Puff R, Eitel S, Beyerlein A, Gloning KP, Bonifacio E, Becker P, Ziegler AG. Einfluss von Diabetes während der Schwangerschaft auf das Immunsystem und die Entwicklung des fetalen Thymus. DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1584108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Heinrich M, Haupt F, Winkler C, Jergens S, Endesfelder D, Becker P, Antl N, Warncke K, Achenbach P, Ziegler AG. Heterogeneity of young patients with new-onset diabetes mellitus. DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1584097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Becker P, Furie R, Mitrane M, Zhao E. THU0307 Repository Corticotropin Injection (RCI) Attenuates Disease Activity in Patients with Persistently Active Systemic Lupus Erythematosus (SLE) Requiring Corticosteroids: Results from A 44-Week Open-Label Extension Study:. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Normand A, Djenad F, Becker P, Gabriel F, Gary-Toussaint M, Cassagne C, Gautier M, Ranque S, Accoceberry I, Marty P, Hendrickx M, Piarroux R. Identification en ligne des moisissures et des dermatophytes. J Mycol Med 2016. [DOI: 10.1016/j.mycmed.2016.04.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Higgins P, Decker D, Becker P. AB0105 Inhibition of A Streptococcal Cell Wall Model of Arthritis Flare by Repository Corticotropin Injection. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Becker P, Libowitzky E, Kleinschrodt R, Bohatý L. Linear optical properties and Raman spectroscopy of natural fluorapatite. CRYSTAL RESEARCH AND TECHNOLOGY 2016. [DOI: 10.1002/crat.201500341] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Stevens P, Muller E, Becker P. Gastroschisis in a developing country: poor resuscitation is a more significant predictor of mortality than postnasal transfer time. S AFR J SURG 2016; 54:4-9. [PMID: 28240489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
BACKGROUND The time from birth to the first paediatric surgical consultation of neonates with gastroschisis is a predictor of mortality in dveloping countries. This is contrary to findings in the developed world. We set out to document this relationship within our population. METHOD Neonates with gastroschisis who were transferred to Steve Biko Academic Hospital within the study period were included. The association between mortality and demographic, clinical and biochemical variables was assessed. Significant variables after univariate analysis were subjected to multivariates regression. RESULTS Sixty patients were included. The mortality rate was 65%. Mean transfer time and distance were 14.9 hours and 225km. Forty-eight per cent of the neonates were either dehydrated or in hypovolaemic shock clinically on arrival. Eight neonates arrived hypothermic. It was shown through univariate analysis that female sex, appropriate weight for gestational age, hydration status, gestation, transfer time, serum urea, base deficit and serum bicarbonate (HCO3) were significant predictors of mortality. Only female sex, appropriate weight for gestational age and serum HC03 were shown to be significant using ultivariate analysis. CONCLUSION Our high mortality rate was not due to lengthy transfer times. The poor clinical condition of the patients on arrival at our hospital, which relates to deficiencies in the neonatal transfer system, had a direct impact on the survival of neonates with gastroschisis.
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Bohatý L, Held P, Becker P. Crystal growth, crystal structure and optical properties of calcium antimony tartrate nonahydrate, Ca[Sb2((+)C4H2O6)2]·9H2O. CRYSTAL RESEARCH AND TECHNOLOGY 2015. [DOI: 10.1002/crat.201500269] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Bohatý L, Becker P, Haussühl E, Němec I, Lux O, Joachim Eichler H, Yoneda H, Shirakawa A, Kaminskii AA. Single crystals of guanidinium zinc sulfate, [C(NH 2) 3] 2Zn(SO 4) 2 – growth, structure, vibrational spectroscopy and stimulated Raman scattering. Z KRIST-CRYST MATER 2015. [DOI: 10.1515/zkri-2015-1839] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Large single crystals of the tetragonal (space group I4̅2d) guanidinium zinc sulfate, [C(NH2)3]2Zn(SO4)2, were grown and the crystal structure was redetermined. Vibrational spectra obtained by Raman and IR investigations are presented, together with an assignment of the observed vibration modes. Precise refractive index data in the wavelength range from 0.365 to 1.083 μm are given. [C(NH2)3]2Zn(SO4)2 is introduced as a new stimulated Raman scattering (SRS)-active crystal with three SRS-active vibration modes with ω
SRS1 ≈ 985 cm–1, ω
SRS2 ≈ 3390 cm–1 and ω
SRS3 ≈ 1015 cm–1. They allow for the generation of broadband nonlinear emission via χ
(3)- (SRS and Raman-induced four wave mixing, RFWM) as well as cascaded χ
(2)↔χ
(3)- processes.
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Ackermann M, Andersen L, Becker P, Bohatý L. Pyroelectric properties of the monoclinic rare earth nitrates A
2
Ln(NO 3) 5·4H 2O ( A = NH 4, Rb; Ln = La, Ce). Z KRIST-CRYST MATER 2015. [DOI: 10.1515/zkri-2014-1827] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The pyroelectric effect of four isomorphic monoclinic (space group Cc), non-ferroelectric rare earth nitrates A
2
Ln(NO3)5·4H2O (A = NH4, Rb; Ln = La, Ce) was investigated in the temperature range between 100 K and 300 K, using a home-made continuous-flow cryostat for measurements of pyroelectric currents. The symmetry-allowed temperature-dependent change of orientation of the pyroelectric vector
p
within the mirror plane is unusually large, showing a rotation of
p
of 148°, 129°, 36° and 40° for (NH4)2La(NO3)5·4H2O, (NH4)2Ce(NO3)5·4H2O, Rb2La(NO3)5·4H2O and Rb2Ce(NO3)5·4H2O, respectively, while changing the temperature from 100 K to 300 K in each case. The pyroelectric coefficients are up to ten times larger than p
3
of tourmaline. In addition, new data of the pyroelectric coefficients of Li2SO4·H2O and BiB3O6 and their temperature dependence are given.
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Leo N, Meier D, Becker P, Bohatý L, Fiebig M. Magnetically driven second-harmonic generation with phase matching in MnWO₄. OPTICS EXPRESS 2015; 23:27700-27706. [PMID: 26480432 DOI: 10.1364/oe.23.027700] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Phase matching is known to enhance the nonlinear optical response in materials with a non-centrosymmetric crystallographic or electronic structure. In contrast, phase-matched frequency doubling driven by non-centrosymmetric magnetism that induces acentricity in otherwise centrosymmetric structures has not been reported yet. In our study we demonstrate the emergence of magnetically driven second-harmonic generation (SHG) with phase matching in MnWO4. The phase-matched wavelength for SHG can be tuned continuously between 450 nm to 630 nm with the conversion efficiency being determined by the refractive indices and their dispersion. Our findings reveal a new strategy towards magnetism-based conversion-materials and a route for controlling the nonlinear signal yield by acting primarily on the material's spin degree of freedom rather than employing its electronic or structural properties.
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Van Aardt MC, Dreyer G, Richter KL, Becker P. Human papillomavirus-type distribution in South African women without cytological abnormalities: a peri-urban study. SOUTHERN AFRICAN JOURNAL OF GYNAECOLOGICAL ONCOLOGY 2015. [DOI: 10.1080/20742835.2013.11441218] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Hahnemann ML, Wittschieber D, Becker P. ["Needles and pins". Self injury behavior by ingestion of numerous unusual sharp foreign bodies]. ROFO-FORTSCHR RONTG 2015; 188:91-2. [PMID: 26114252 DOI: 10.1055/s-0035-1553271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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