Zobrazeno 1 - 10
of 99
pro vyhledávání: '"Pröpper, D."'
Autor:
Charnukha, A., Pröpper, D., Zhigadlo, N. D., Naito, M., Schmidt, M., Wang, Z., Deisenhofer, J., Loidl, A., Keimer, B., Boris, A. V., Basov, D. N.
Publikováno v:
Phys. Rev. Lett. 120, 087001 (2018)
We report the first determination of the in-plane complex optical conductivity of 1111 high-Tc superconducting iron oxypnictide single crystals PrFeAsO0.6F0.35 and thin films SmFeAsO1-xFx by means of bulk-sensitive conventional and micro-focused infr
Externí odkaz:
http://arxiv.org/abs/1804.02021
Autor:
Larkin, T. I., Yaresko, A. N., Pröpper, D., Kikoin, K. A., Lu, Y. F., Takayama, T., Mathis, Y. - L., Rost, A. W., Takagi, H., Keimer, B., Boris, A. V.
Publikováno v:
Phys. Rev. B 95, 195144 (2017)
We report the complex dielectric function of the quasi-one-dimensional chalcogenide Ta$_2$NiSe$_5$, which exhibits a structural phase transition that has been attributed to exciton condensation below $T_c = 326$ K, and of the isostructural Ta$_2$NiS$
Externí odkaz:
http://arxiv.org/abs/1702.05953
Autor:
Hunt, C. R., Nicoletti, D., Kaiser, S., Pröpper, D., Loew, T., Porras, J., Keimer, B., Cavalleri, A.
Publikováno v:
Phys. Rev. B 94, 224303 (2016)
Optical excitation of apical oxygen vibrations in YBa$_{2}$Cu$_{3}$O$_{6+\delta}$ has been shown to enhance its c-axis superconducting-phase rigidity, as evidenced by a transient blue shift of the equilibrium inter-bilayer Josephson plasma resonance.
Externí odkaz:
http://arxiv.org/abs/1607.08655
Autor:
Pröpper, D., Yaresko, A. N., Höppner, M., Matiks, Y., Mathis, Y. -L., Takayama, T., Matsumoto, A., Takagi, H., Keimer, B., Boris, A. V.
We report the complex dielectric function along and perpendicular to the IrO2 planes in the layered perovskite Sr2IrO4 determined by spectroscopic ellipsometry in the spectral range from 12 meV to 6 eV. Thin high quality single crystals were stacked
Externí odkaz:
http://arxiv.org/abs/1602.06090
Autor:
Charnukha, A., Post, K. W., Thirupathaiah, S., Pröpper, D., Wurmehl, S., Roslova, M., Morozov, I., Büchner, B., Yaresko, A. N., Boris, A. V., Borisenko, S. V., Basov, D. N.
Publikováno v:
Sci. Rep. 5, 18620 (2015)
Iron-based superconductors have been found to exhibit an intimate interplay of orbital, spin, and lattice degrees of freedom, dramatically affecting their low-energy electronic properties, including superconductivity. Albeit the precise pairing mecha
Externí odkaz:
http://arxiv.org/abs/1601.08195
Autor:
Sung, N. H., Gretarsson, H., Proepper, D., Porras, J., Tacon, M. Le, Boris, A. V., Keimer, B., Kim, B. J.
We report on the growth of stoichiometric Sr$_2$IrO$_4$ single crystals, which allow us to unveil their intrinsic magnetic properties. The effect of different growth conditions has been investigated for crystals grown by the flux method. We find that
Externí odkaz:
http://arxiv.org/abs/1509.06342
Autor:
Charnukha, A., Pröpper, D., Larkin, T. I., Sun, D. L., Li, Z. W., Lin, C. T., Wolf, T., Keimer, B., Boris, A. V.
Publikováno v:
Phys. Rev. B 88, 184511 (2013)
We report the complex dielectric function of high-quality $A\textrm{Fe}_2\textrm{As}_2$, ($A$=Ca, Sr, Ba) single crystals with $T_{\mathrm{N}}\approx150\ \textrm{K}$, $200\ \textrm{K}$, and $138\ \textrm{K}$, respectively, determined by broadband spe
Externí odkaz:
http://arxiv.org/abs/1402.0325
Autor:
Pröpper, D., Yaresko, A. N., Larkin, T. I., Stanislavchuk, T. N., Sirenko, A. A., Takayama, T., Matsumoto, A., Takagi, H., Keimer, B., Boris, A. V.
Publikováno v:
Phys. Rev. Lett. 112, 087401 (2014)
We report the complex dielectric function of high-quality Na_3Ir_3O_8 single crystals determined by spectroscopic ellipsometry in the spectral range from 15 meV to 2 eV. The far-infrared phonon spectra exhibit highly asymmetric line shapes characteri
Externí odkaz:
http://arxiv.org/abs/1311.3191
Autor:
Beleanu, A., Kiss, J., Kreiner, G., Köhler, C., Müchler, L., Schnelle, W., Burkhardt, U., Chadov, S., Medvediev, S., Ebke, D., Cordier, G., Albert, B., Hoser, A., Bernardi, F., Larkin, T. I., Pröpper, D., Boris, A. V., Keimer, B., Felser, C.
Antiferromagnetic semiconductors are new alternative materials for spintronic applications and spin valves. In this work, we report a detailed investigation of two antiferromagnetic semiconductors AMnAs (A = Li, LaO), which are isostructural to the w
Externí odkaz:
http://arxiv.org/abs/1307.6404
Autor:
Charnukha, A., Cvitkovic, A., Prokscha, T., Pröpper, D., Ocelic, N., Suter, A., Salman, Z., Morenzoni, E., Deisenhofer, J., Tsurkan, V., Loidl, A., Keimer, B., Boris, A. V.
Publikováno v:
Phys. Rev. Lett. 109, 017003 (2012)
We studied phase separation in a single-crystalline antiferromagnetic superconductor Rb2Fe4Se5 (RFS) using a combination of scattering-type scanning near-field optical microscopy (s-SNOM) and low-energy muon spin rotation (LE-\mu SR). We demonstrate
Externí odkaz:
http://arxiv.org/abs/1202.5446