Zobrazeno 1 - 10
of 225
pro vyhledávání: '"Argyriou, D N"'
Magnetic order and excitations in multiferroic DyMnO3 were studied by neutron scattering experiments using a single crystal prepared with enriched 162Dy isotope. The ordering of Mn moments exhibits pronounced hysteresis arising from the interplay bet
Externí odkaz:
http://arxiv.org/abs/1412.1938
Autor:
Viskadourakis, Z., Radulov, I., Petrović, A. P., Mukherjee, S., Andersen, B. M., Jelbert, G., Headings, N. S., Hayden, S. M., Kiefer, K., Landsgesell, S., Argyriou, D. N., Panagopoulos, C.
Publikováno v:
Phys. Rev. B 85, 214502 (2012)
We report the discovery of a ferroelectric ground state below 4.5 K in highly underdoped La_2CuO_(4+x) accompanied by slow charge dynamics which develop below T~40 K. An anisotropic magnetoelectric response has also been observed, indicating consider
Externí odkaz:
http://arxiv.org/abs/1111.0050
Autor:
Christensen, O. Zaharko. N. B., Cervellino, A., Tsurkan, V., Maljuk, A., Stuhr, U., Niedermayer, C., Yokaichiya, F., Argyriou, D. N., Boehm, M., Loidl, A.
Publikováno v:
Physics Review B 84,094403(2011)
We study spin liquid in the frustrated diamond lattice antiferromagnet CoAl2O4 by means of single crystal neutron scattering in zero and applied magnetic field. The magnetically ordered phase appearing below TN=8 K remains nonconventional down to 1.5
Externí odkaz:
http://arxiv.org/abs/1103.5799
Autor:
Tóth, S., Lake, B., Kimber, S. A. J., Pieper, O., Reehuis, M., Islam, A. T. M. N., Zaharko, O., Ritter, C., Hill, A. H., Ryll, H., Argyriou, D. N., Williams, A. J.
Publikováno v:
Phys. Rev. B 84, 054452 (2011)
{\alpha}-CaCr2O4 is a distorted triangular antiferromagnet. The magnetic Cr3+ ions which have spin-3/2 and interact with their nearest neighbors via Heisenberg direct exchange interactions, develop long-range magnetic order below T_N=42.6 K. Powder a
Externí odkaz:
http://arxiv.org/abs/1102.2812
Chuang et al (Reports, 8th of January 2010, p. 181)1 report quasiparticle interference (QPI) imaging that shows pronounced C2 asymmetry. They interpreted this result as indication of an electronic nematic phase with an electron band dispersive only a
Externí odkaz:
http://arxiv.org/abs/1005.1761
Autor:
Wehrenfennig, C., Meier, D., Lottermoser, Th., Lonkai, Th., Hoffmann, J. -U., Aliouane, N., Argyriou, D. N., Fiebig, M.
Publikováno v:
Phys. Rev. B 82, 100414 (2010)
Magnetic order of the manganese and rare-earth lattices according to different symmetry representations is observed in multiferroic hexagonal (h-) DyMnO$_3$ by optical second harmonic generation and neutron diffraction. The incompatibility reveals th
Externí odkaz:
http://arxiv.org/abs/1005.1152
Autor:
Feyerherm, R., Dudzik, E., Valencia, S., Wolter, A. U. B., Milne, C. J., Landsgesell, S., Alber, D., Argyriou, D. N.
Publikováno v:
Phys. Rev. B 82 (2010) 024103
Synchrotron X-ray diffraction investigations of two single crystals of Na_xCoO_2 from different batches with composition x = 0.525-0.530 reveal homogeneous incommensurate sodium ordering with propagation vector (0.53 0.53 0) at room-temperature. The
Externí odkaz:
http://arxiv.org/abs/1004.4990
Autor:
Liu, T. J., Hu, J., Qian, B., Fobes, D., Mao, Z. Q., Bao, W., Reehuis, M., Kimber, S. A. J., Prokes, K., Matas, S., Argyriou, D. N., Hiess, A., Rotaru, A., Pham, H., Spinu, L., Qiu, Y., Thampy, V., Savici, A. T., Rodriguez, J. A., Broholm, C.
Publikováno v:
Nature Materials 9,718-720 (2010)
The iron chalcogenide Fe1+y(Te1-xSex) is structurally the simplest of the Fe-based superconductors. Although the Fermi surface is similar to iron pnictides, the parent compound Fe1+yTe exhibits antiferromagnetic order with in-plane magnetic wave-vect
Externí odkaz:
http://arxiv.org/abs/1003.5647
Publikováno v:
Nature Materials 8, 798 - 802 (2009)
Charge carriers in low-doped semiconductors may distort the atomic lattice and trap themselves forming so-called small polarons. High carrier concentrations can lead to short range ordered polarons (large polarons) and even to long range charge and o
Externí odkaz:
http://arxiv.org/abs/1001.4636
Autor:
Argyriou, D. N., Hiess, A., Akbari, A., Eremin, I., Korshunov, M. M., Hu, Jin, Qian, Bin, Mao, Zhiqiang, Qiu, Yiming, Broholm, Collin, Bao, W.
Publikováno v:
Phys. Rev. B 81, 220503 (2010)
We report on inelastic neutron scattering measurements that find incommensurate itinerant like magnetic excitations in the normal state of superconducting FeTe$_{0.6}$Se$_{0.4}$ (\Tc=14K) at wave-vector $\mathbf{Q}_{inc}=(1/2\pm\epsilon,1/2\mp\epsilo
Externí odkaz:
http://arxiv.org/abs/0911.4713