Zobrazeno 1 - 10
of 610
pro vyhledávání: '"Hemberger J"'
Autor:
Maluski, D., Langenbach, M., Szaller, D., Reschke, S., Prodan, L., Mayorga, I. Cámara, Cheong, S. -W., Tsurkan, V., Kézsmárki, I., Hemberger, J., Grüninger, M.
In NiTe$_3$O$_6$ with a chiral crystal structure, we report on a giant natural optical rotation of the lowest-energy magnon. This polarization rotation, as large as 140 deg/mm, corresponds to a path difference between right and left circular polariza
Externí odkaz:
http://arxiv.org/abs/2312.02733
Autor:
Revelli, A., Sala, M. Moretti, Monaco, G., Magnaterra, M., Attig, J., Peterlini, L., Dey, T., Tsirlin, A. A., Gegenwart, P., Fröhlich, T., Braden, M., Grams, C., Hemberger, J., Becker, P., van Loosdrecht, P. H. M., Khomskii, D. I., Brink, J. van den, Hermanns, M., Grüninger, M.
Publikováno v:
Phys. Rev. B 106, 155107 (2022)
The mixed-valent iridate Ba3InIr2O9 has been discussed as a promising candidate for quantum spin-liquid behavior. The compound exhibits Ir$^{4.5+}$ ions in face-sharing IrO6 octahedra forming Ir2O9 dimers with three t2g holes per dimer. Our results e
Externí odkaz:
http://arxiv.org/abs/2207.04795
Publikováno v:
J. Infrared Millim. Terahertz Waves 43, 314 (2022)
For terahertz spectroscopy on single crystals, the wavelength $\lambda$ often is comparable to the size of the studied samples, emphasizing diffraction effects. Using a continuous-wave terahertz spectrometer in transmission geometry, we address the e
Externí odkaz:
http://arxiv.org/abs/2203.13660
Autor:
Jenni, K., Wirth, F., Dietrich, K., Berger, L., Sidis, Y., Kunkemöller, S., Grams, C. P., Khomskii, D. I., Hemberger, J., Braden, M.
Publikováno v:
Phys. Rev. Materials 4, 085001 (2020)
Combining quasistatic and time-resolved transport measurements with X-ray and neutron diffraction experiments we study the non-equilibrium states that arise in pure and in Ti substituted Ca$_2$RuO$_4$ under the application of current densities. Time-
Externí odkaz:
http://arxiv.org/abs/2007.00444
Akademický článek
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Autor:
de Lima, B. S., da Luz, M. S., Oliveira, F. S., Alves, L. M. S., Santos, C. A. M. dos, Jomard, F., Sidis, Y., Bourges, P., Harms, S., Grams, C. P., Hemberger, J., Lin, X., Fauque, B., Behnia, K.
SrTiO$_{3}$ undergoes a cubic-to-tetragonal phase transition at 105K. This antiferrodistortive transition is believed to be in competition with incipient ferroelectricity. Substituting strontium by isovalent calcium induces a ferroelectric order. Int
Externí odkaz:
http://arxiv.org/abs/1410.7366
Autor:
Thirunavukkuarasu, K., Langenbach, M., Roggenbuck, A., Vidal, E., Schmitz, H., Hemberger, J., Grüninger, M.
Publikováno v:
Appl. Phys. Lett. 106, 031111 (2015)
Photomixing of two near-infrared lasers is well established for continuous-wave terahertz spectroscopy. Photomixing of three lasers allows us to measure at three terahertz frequencies simultaneously. Similar to Fourier spectroscopy, the spectral info
Externí odkaz:
http://arxiv.org/abs/1410.0648
By using broadband dielectric spectroscopy in the radiofrequency and microwave range we studied the magnetoelectric dynamics in the multiferroic chiral antiferromagnet MnWO$_4$. Above the multiferroic phase transition at $T_{N2} \approx 12.6$ K we ob
Externí odkaz:
http://arxiv.org/abs/1408.1557
Autor:
Langenbach, M., Roggenbuck, A., Mayorga, I. Cámara, Deninger, A., Thirunavukkuarasu, K., Hemberger, J., Grüninger, M.
Publikováno v:
J. Infrared Milli. Terahz Waves 35, 918 (2014)
We report on the group delay observed in continuous-wave terahertz spectroscopy based on photomixing with phase-sensitive homodyne detection. We discuss the different contributions of the experimental setup to the phase difference \Delta\phi(\nu) bet
Externí odkaz:
http://arxiv.org/abs/1406.6589
Publikováno v:
Phys. Rev. B 90, 155105 (2014)
We report on polarized infrared reflectivity measurements of multiferroic, monoclinic MnWO4 between 10K and 295K. The full dielectric tensor and the frequency dependence of the orientation of the principal axes have been determined in the frequency r
Externí odkaz:
http://arxiv.org/abs/1406.6313