Now showing items 485-504 of 1345

    • Macroscopic Ensembles of Aligned Carbon Nanotubes in Bubble Imprints Studied by Polarized Raman Microscopy 

      Ushiba, Shota; Hoyt, Jordan; Masui, Kyoko; Kono, Junichiro; Kawata, Satoshi; Shoji, Satoru (2014)
      We study the alignment of single-wall carbon nanotubes (SWCNTs) in bubble imprints through polarized Raman microscopy. A hemispherical bubble containing SWCNTs is pressed against a glass substrate, resulting in an imprint ...
    • Magnesium Fluctuations Modulate RNA Dynamics in the SAM-I Riboswitch 

      Hayes, Ryan L.; Noel, Jeffrey K.; Mohanty, Udayan; Whitford, Paul C.; Hennelly, Scott P.; Onuchic, José N.; Sanbonmatsu, Karissa Y. (2012)
      Experiments demonstrate that Mg2+ is crucial for structure and function of RNA systems, yet the detailed molecular mechanism of Mg2+ action on RNA is not well understood. We investigate the interplay between RNA and Mg2+ ...
    • A magnesium-induced triplex pre-organizes the SAM-II riboswitch 

      Roy, Susmita; Lammert, Heiko; Hayes, Ryan L.; Chen, Bin; LeBlanc, Regan; Dayie, T. Kwaku; Onuchic, José N.; Sanbonmatsu, Karissa Y. (2017)
      Our 13C- and 1H-chemical exchange saturation transfer (CEST) experiments previously revealed a dynamic exchange between partially closed and open conformations of the SAM-II riboswitch in the absence of ligand. Here, ...
    • Magnetic and Ising quantum phase transitions in a model for isoelectronically tuned iron pnictides 

      Wu, Jianda; Si, Qimiao; Abrahams, Elihu (2016)
      Considerations of the observed bad-metal behavior in Fe-based superconductors led to an early proposal for quantum criticality induced by isoelectronic P for As doping in iron arsenides, which has since been experimentally ...
    • Magnetic and transport properties of the layered transition-metal pnictides R3T4As4O2−δ (R = La, Ce, Pr, Nd, and Sm, T = Ni, Cu) 

      Wang, Jiakui K.; Marcinkova, A.; Chen, Chih-Wei; He, Hua; Aronson, Meigan; Morosan, E. (2014)
      The magnetic and transport properties of the novel R3T 4As4O2−δ (R = La, Ce, Pr, Nd and Sm, T = Ni and Cu) layered materials were studied using structural and physical properties measurements. Varying the rare-earth ion ...
    • Magnetic domain structures of focused ion beam-patterned cobalt films using scanning ion microscopy with polarization analysis 

      Li, J.; Rau, C. (2004)
      Studies of magnetic domain distributions in patterned magnetic materials are of pivotal importance in the areas of ultrahigh density magnetic recording, MRAM design, and miniaturized magnetic sensor arrays. Scanning ion ...
    • Magnetic field power spectra and magnetic radial diffusion coefficients using CRRES magnetometer data 

      Ali, Ashar F.; Elkington, Scot R.; Tu, Weichao; Ozeke, Louis G.; Chan, Anthony A.; Friedel, Reiner H.W. (2015)
      We used the fluxgate magnetometer data from Combined Release and Radiation Effects Satellite (CRRES) to estimate the power spectral density (PSD) of the compressional component of the geomagnetic field in the ∼1 mHz to ∼8 ...
    • Magnetic field topology and chemical spot distributions in the extreme Ap star HD 75049 

      Kochukhov, O.; Rusomarov, N.; Valenti, J.A.; Stempels, H.C.; Snik, F.; Rodenhuis, M.; Piskunov, N.; Makaganiuk, V.; Keller, C.U.; Johns-Krull, C.M. (2015)
      Context. Intermediate-mass, magnetic chemically peculiar (Ap) stars provide a unique opportunity to study the topology of stellar magnetic fields in detail and to investigate magnetically driven processes of spot formation. ...
    • Magnetic fields of intermediate mass T Tauri stars 

      Lavail, A.; Kochukhov, O.; Hussain, G.A.J.; Alecian, E.; Herczeg, G.J.; Johns-Krull, C. (2017)
      Aims: In this paper, we aim to measure the strength of the surface magnetic fields for a sample of five intermediate mass T Tauri stars and one low mass T Tauri star from late-F to mid-K spectral types. While magnetic ...
    • Magnetic moment evolution and spin freezing in doped BaFe2As2 

      Pelliciari, Jonathan; Huang, Yaobo; Ishii, Kenji; Zhang, Chenglin; Dai, Pengcheng; Chen, Gen Fu; Xing, Lingyi; Wang, Xiancheng; Jin, Changqing; Ding, Hong; Werner, Philipp; Schmitt, Thorsten (2017)
      Fe-K β X-ray emission spectroscopy measurements reveal an asymmetric doping dependence of the magnetic moments μbare in electron- and hole-doped BaFe2As2. At low temperature, μbare is nearly constant in hole-doped samples, ...
    • Magnetic trapping of metastable 3P2 atomic strontium 

      Nagel, S.B.; Simien, C.E.; Laha, S.; Gupta, P.; Ashoka, V.S.; Killian, T.C. (2003-01-13)
    • Magnetically Controlled Accretion on the Classical T Tauri Stars GQ Lupi and TQ Hydrae 

      Johns-Krull, Christopher M.; Chen, Wei; Valenti, Jeff A.; Jeffers, Sandra V.; Piskunov, Nikolai E.; Kochukhov, Oleg; Makaganiuk, V.; Stempels, H.C.; Snik, Frans; Keller, Christoph; Rodenhuis, M. (2013)
      We present high spectral resolution (R ≈ 108,000) Stokes V polarimetry of the classical T Tauri stars (CTTSs) GQ Lup and TW Hya obtained with the polarimetric upgrade to the HARPS spectrometer on the ESO 3.6 m telescope. ...
    • Magnetism, chemical spots, and stratification in the HgMn star ϕ Phoenicis 

      Makaganiuk, V.; Kochukhov, O.; Piskunov, N.; Jeffers, S.V.; Johns-Krull, C.M.; Keller, C.U.; Rodenhuis, M.; Snik, F.; Stempels, H.C.; Valenti, J.A. (2012)
      Context. Mercury-manganese (HgMn) stars have been considered as non-magnetic and non-variable chemically peculiar (CP) stars for a long time. However, recent discoveries of the variability in spectral line profiles have ...
    • Magnetization Dynamics from Time-Dependent Noncollinear Spin Density Functional Theory Calculations 

      Peralta, Juan E.; Hod, Oded; Scuseria, Gustavo E. (2015)
      A computational scheme, based on a time-dependent extension of noncollinear spin density functional theory, for the simultaneous simulation of charge and magnetization dynamics in molecular systems is presented. We employ ...
    • Magnetooptics of Exciton Rydberg States in a Monolayer Semiconductor 

      Stier, A.V.; Wilson, N.P.; Velizhanin, K.A.; Kono, J.; Xu, X.; Crooker, S.A. (2018)
      We report 65 T magnetoabsorption spectroscopy of exciton Rydberg states in the archetypal monolayer semiconductor WSe2. The strongly field-dependent and distinct energy shifts of the 2s, 3s, and 4s excited neutral excitons ...
    • Magnetoreflection spectroscopy of monolayer transition-metal dichalcogenide semiconductors in pulsed magnetic fields 

      Stier, Andreas V.; McCreary, Kathleen M.; Jonker, Berend T.; Kono, Junichiro; Crooker, Scott A. (2016)
      The authors describe recent experimental efforts to perform polarization-resolved optical spectroscopy of monolayer transition-metal dichalcogenide semiconductors in very large pulsed magnetic fields to 65 T. The experimental ...
    • Magnetospheric Multiscale Dayside Reconnection Electron Diffusion Region Events 

      Webster, J.M.; Burch, J.L.; Reiff, P.H.; Daou, A.G.; Genestreti, K.J.; Graham, D.B.; Torbert, R.B.; Ergun, R.E.; Sazykin, S.Y.; Marshall, A.; Allen, R.C.; Chen, L.-J.; Wang, S.; Phan, T.D.; Giles, B.L.; Moore, T.E.; Fuselier, S.A.; Cozzani, G.; Russell, C.T.; Eriksson, S.; Rager, A.C.; Broll, J.M.; Goodrich, K.; Wilder, F. (2018)
      We use high‐resolution data from dayside passes of the Magnetospheric Multiscale (MMS) mission to create for the first time a comprehensive listing of encounters with the electron diffusion region (EDR), as evidenced by ...
    • Magnetotransport in type-enriched single-wall carbon nanotube networks 

      Wang, X.; Gao, W.; Li, X.; Zhang, Q.; Nanot, S.; Hároz, E.H.; Kono, J.; Rice, W.D. (2018)
      Single-wall carbon nanotubes (SWCNTs) exhibit a wide range of physical phenomena depending on their chirality. Nanotube networks typically contain a broad mixture of chiralities, which prevents an in-depth understanding ...
    • Malaria Theranostics using Hemozoin-Generated Vapor Nanobubbles 

      Lukianova-Hleb, Ekaterina Y.; Lapotko, Dmitri O. (2014)
      Malaria remains a widespread and deadly infectious human disease, with increasing diagnostic and therapeutic challenges due to the drug resistance and aggressiveness of malaria infection. Early detection and innovative ...
    • Mass scaling and nonadiabatic effects in photoassociation spectroscopy of ultracold strontium atoms 

      Borkowski, Mateusz; Morzyński, Piotr; Ciuryło, Roman; Julienne, Paul S.; Yan, Mi; DeSalvo, Brian J.; Killian, T.C. (2014)
      We report photoassociation spectroscopy of ultracold 86Sr atoms near the intercombination line and provide theoretical models to describe the obtained bound-state energies. We show that using only the molecular states ...