Zobrazeno 1 - 10
of 1 352
pro vyhledávání: '"Castellan, J."'
Autor:
Merritt, A. M., Weber, F., Castellan, J. -P., Wolf, Th., Ishikawa, D., Said, A. H., Alatas, A., Fernandes, R. M., Baron, A. Q. R., Reznik, D.
Publikováno v:
Phys. Rev. Lett. 124, 157001 (2020)
Nematicity is ubiquitous in electronic phases of high-$T_c$ superconductors, particularly in the Fe-based systems. We used inelastic x-ray scattering to extract the temperature-dependent nematic correlation length $\xi$ from the anomalous softening o
Externí odkaz:
http://arxiv.org/abs/2001.01343
Autor:
Weber, F., Parshall, D., Pintschovius, L., Castellan, J. -P., Kauth, M., Merz, M., Wolf, Th., Schütt, M., Schmalian, J., Fernandes, R. M., Reznik, D.
Publikováno v:
Phys. Rev. B 98, 014516 (2018)
Nematicity is ubiquitous in electronic phases of high-$T_c$ superconductors, particularly in the Fe-based systems. While several experiments have probed nematic fluctuations, they have been restricted to uniform or momentum averaged fluctuations. Her
Externí odkaz:
http://arxiv.org/abs/1806.05581
Publikováno v:
Phys. Rev. B 97, 245139 (2018)
According to standard theory the magnetoresistance magnitude in ferromagnetic manganites crucially depends on the electron-phonon coupling strength. We showed that in La0.7Sr0.3MnO3 the phonon renormalization is strong, despite its relatively small m
Externí odkaz:
http://arxiv.org/abs/1805.05596
Autor:
Grube, K., Pintschovius, L., Weber, F., Castellan, J. -P., Zaum, S., Kuntz, S., Schweiss, P., Stockert, O., Bachus, S., Shimura, Y., Fritsch, V., Löhneysen, H. v.
Publikováno v:
Phys. Rev. Lett. 121, 087203 (2018)
The heavy-fermion compound CeCu$_{6-x}$Au$_x$ has become a model system for unconventional magnetic quantum criticality. For small Au concentrations $0 \leq x < 0.16$, the compound undergoes a structural transition from orthorhombic to monoclinic cry
Externí odkaz:
http://arxiv.org/abs/1804.04513
Autor:
Plumb, K. W., Stock, C., Rodriguez-Rivera, J. A., Castellan, J. -P., Taylor, J. W., Lau, B., Wu, W., Julian, S. R., Kim, Young-June
Publikováno v:
Phys. Rev. B 97, 184431 (2018)
FeCrAs displays an unusual electrical response that is neither metallic in character nor divergent at low temperatures, as expected for an insulating response, and therefore it has been termed a "nonmetal-metal". We carried out neutron scattering exp
Externí odkaz:
http://arxiv.org/abs/1802.05271
Autor:
Merritt, A. M., Castellan, J. -P., Keller, T., Park, S. R., Fernandez-Baca, J. A., Gu, G. D., Reznik, D.
Electron-phonon interaction in copper oxide superconductors is still enigmatic. Strong coupling for certain optic phonons is now well established experimentally, but theoretical understanding is challenging. Scattering of electrons near the Fermi sur
Externí odkaz:
http://arxiv.org/abs/1702.04331
Autor:
Lebert, B. W., Dean, M. P. M., Nicolaou, A., Pelliciari, J., Dantz, M., Schmitt, T., Yu, R., Azuma, M., Castellan, J-P., Miao, H., Gauzzi, A., Baptiste, B., d'Astuto, M.
Publikováno v:
Phys. Rev. B 95, 155110 (2017)
By means of resonant inelastic x-ray scattering at the Cu L$_3$ edge, we measured the spin wave dispersion along $\langle$100$\rangle$ and $\langle$110$\rangle$ in the undoped cuprate Ca$_2$CuO$_2$Cl$_2$. The data yields a reliable estimate of the su
Externí odkaz:
http://arxiv.org/abs/1610.08383
Autor:
Weber, F., Parshall, D., Pintschovius, L., Castellan, J. -P., Merz, M., Wolf, Th., Schütt, M., Fernandes, R. M., Reznik, D.
Nematic order is ubiquitous in liquid crystals and is characterized by a rotational symmetry breaking in an otherwise uniform liquid. Recently a similar phenomenon has been observed in some electronic phases of quantum materials related to high tempe
Externí odkaz:
http://arxiv.org/abs/1610.00099
Autor:
Li, Z. W., Drees, Y., Ricci, A., Lamago, D., Piovano, A., Rotter, M., Schmidt, W., Sobolev, O., Rütt, U., Gutowski, O., Sprung, M., Castellan, J. P., Tjeng, L. H., Komarek, A. C.
The single-layer perovskite cobaltates have attracted enormous attention due to the recent observation of hour-glass shaped magnetic excitation spectra which resemble the ones of the famous high-temperature superconducting cuprates. Here, we present
Externí odkaz:
http://arxiv.org/abs/1601.01795
Among colossal magnetoresistive manganites the prototypical ferromagnetic manganite La$_{0.7}$Sr$_{0.3}$MnO$_{3}$ has a relatively small magnetoresistance, and has been long assumed to have only weak electron-lattice coupling. Here we report that La$
Externí odkaz:
http://arxiv.org/abs/1510.01600