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Elastic and inelastic neutron scattering studies have been carried out on the pyrochlore magnet Ho2Ti2O7. Measurements in zero applied magnetic field show that the disordered spin ice ground state of Ho2Ti2O7 is characterized by a pattern…

Strongly Correlated Electrons · Physics 2016-08-05 J. P. Clancy , J. P. C. Ruff , S. R. Dunsiger , Y. Zhao , H. A. Dabkowska , J. S. Gardner , Y. Qiu , J. R. D. Copley , T. Jenkins , B. D. Gaulin

Cubic zinc oxide (rs-ZnO), metastable under normal conditions, was synthesized from the wurtzite modification (w-ZnO) at 7.7 GPa and ~800 K in the form of nanoparticles isolated in the NaCl matrix. The phase transition rs-ZnO \rightarrow…

Materials Science · Physics 2011-02-09 P. S. Sokolov , A. N. Baranov , Zh. V. Dobrokhotova , V. L. Solozhenko

We have investigated the quasi-one dimensional Ni-chain compound PbMn$_2$Ni$_6$Te$_2$O$_{18}$ using theoretical DFT calculations, inelastic neutron scattering and optical spectroscopy in order to understand the nature of magnetic exchange…

High-resolution angle-resolved photoemission spectroscopy and ultrafast optical pump-probe spectroscopy were used to study semimetallic 1T - TiTe2 quasiparticle dispersion and dynamics. A kink and a flat band, having the same energy scale…

The structural dynamics of a 1D mixed-metal cyanide, Cu$_{1/3}$Ag$_{1/3}$Au$_{1/3}$CN, with intriguing thermal properties is explored. All the current known related compounds with straight-chain structures, such as CuCN, AgCN, AuCN and…

Measurements of the electrical and thermal conductivities, thermopower and paramagnetic susceptibility have been performed on single crystal samples of Bi1/2Sr1/2MnO3 and complemented with the X-ray powder diffraction data. A pronounced…

Strongly Correlated Electrons · Physics 2009-11-07 J. Hejtmanek , K. Knizek , Z. Jirak , M. Hervieu , C. Martin , M. Nevriva , P. Beran

We use temperature dependent neutron powder diffraction (NPD) to investigate the structural changes and magnetic interactions in double perovskite Sr$_{2-x}$La$_x$CoNbO$_6$ ($x=$ 0.4 and 0.6). A structural phase transition from tetragonal…

Strongly Correlated Electrons · Physics 2022-02-22 Ajay Kumar , Anil Jain , S. M. Yusuf , R. S. Dhaka

We investigate the feasibility of four-connected nets as hypothetical zinc cyanide polymorphs, as well as their thermal and mechanical properties, through quantum chemical calculations and molecular dynamics simulations. We confirm the…

Materials Science · Physics 2015-07-03 Fabien Trousselet , Anne Boutin , François-Xavier Coudert

The short range ordered magnetic correlations have been studied in half doped La0.5Ca0.5-xSrxMnO3 (x = 0.1, 0.3 and 0.4) compounds by polarized neutron scattering technique. On doping Sr2+ for Ca2+ ion, these compounds with x = 0.1, 0.3,…

Materials Science · Physics 2015-05-18 I. Dhiman , A. Das , R. Mittal , Y. Su , A. Kumar , A. Radulescu

We present a comprehensive temperature and polarization dependent inelastic light scattering (Raman) study on single crystals of two-dimensional CuCrP2S6, a layered van der Waals material exhibiting coupled magnetic and electric degrees of…

The kinetic energy variation of emitted light clusters has been employed as a clock to explore the time evolution of the temperature for thermalizing composite systems produced in the reactions of 26A, 35A and 47A MeV $^{64}$Zn with…

The results on the measurements of dp-elastic scattering cross section at the energy 2 GeV at Internal Target Station at the Nuclotron JINR are reported. The data were obtained for the angular range of 70-107 deg. in the c.m.s. by using CH2…

The dynamical structure factor of solid $^{15}$N$_{2}$ in the $\alpha$ phase ($T<35$K) is measured at the IN4 time-of-flight spectrometer at the Institut Laue Langevin, and the potential performance of this substance as a UCN converter is…

Nuclear Experiment · Physics 2015-06-16 D. J. Salvat , E. Gutsmiedl , C. -Y. Liu , P. Geltenbort , A. Orecchini , S. Paul , H. Schober

Inelastic neutron scattering measurements are reported for a powder sample of the spin-1/2 quantum paramagnet $\rm Cu(Quinoxaline)Br_2$. Magnetic neutron scattering is identified above an energy gap of 1.9 meV. Analysis of the sharp…

Strongly Correlated Electrons · Physics 2007-05-23 Tao Hong , M. Kenzelmann , M. M. Turnbull , C. P. Landee , B. D. Lewis , K. P. Schmidt , G. S. Uhrig , Y. Qiu , C. Broholm , D. H. Reich

A single crystal of the Co2+ based pyrochlore NaCaCo2F7 was studied by inelastic neutron scattering. This frustrated magnet with quenched exchange disorder remains in a strongly correlated paramagnetic state down to one 60th of the…

Strongly Correlated Electrons · Physics 2016-02-03 Kate A. Ross , Jason W. Krizan , Jose A. Rodriguez-Rivera , Robert J. Cava , Collin L. Broholm

Neutron scattering investigations were carried out in PbMg$_{1/3}$Ta$_{2/3}$O$_3$ and BaMg$_{1/3}$Ta$_{2/3}$O$_3$ complex perovskites. The crystal structure of both compounds does not show any phase transition in the temperature range 1.5…

Materials Science · Physics 2007-05-23 S. N. Gvasaliya , B. Roessli , D. Sheptyakov , S. G. Lushnikov , T. A. Shaplygina

We study inelastic neutrino scattering off hot nuclei for temperatures relevant under supernova conditions. The method we use is based on the quasiparticle random phase approximation extended to finite temperatures within the thermo field…

Nuclear Theory · Physics 2014-03-18 Alan A. Dzhioev , A. I. Vdovin , J. Wambach , V. Yu. Ponomarev

We have constructed an approximate microscopic model for the neutron dynamic structure factor of solid methane in phase II. We expect our model to apply for neutron energies below 1\textit{eV} at pressures near 1 bar and temperatures below…

Atomic Physics · Physics 2008-08-21 Yunchang Shin , W. Mike Snow , Chen-yu Liu , Christopher M. Lavelle , David V. Baxter

Thermal expansion of {\alpha}-rhombohedral boron ({\alpha}-B12) and two isostructural boron-rich pnictides (B12P2 and B12As2) has been studied between 298 and 1280 K by high-temperature synchrotron X-ray diffraction. For all studied phases…

Materials Science · Physics 2019-10-01 Kirill A. Cherednichenko , Vladimir L. Solozhenko

We report measurements of the neutron diffuse scattering from a single crystal of the relaxor ferroelectric Pb(Zn_1/3Nb_2/3)O_3 doped with 8% PbTiO_3 (PZN-8%PT) for temperatures 100 K < T < 530 K and electric fields 0 kV/cm < E < 10 kV/cm.…

Materials Science · Physics 2009-11-10 P. M. Gehring , K. Ohwada , G. Shirane
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