Zobrazeno 1 - 10
of 2 597
pro vyhledávání: '"Chung J. H."'
Autor:
Yamani, Zahra, Buyers, W. J. L., Wang, F., Kim, Y-J., Chung, J. -H., Chang, S., Gehring, P. M., Gasparovic, G., Stock, C., Broholm, C. L., Baglo, J. C., Liang, Ruixing, Bonn, D. A., Hardy, W. N.
Publikováno v:
Phys. Rev. B 91, 134427 (2015)
Neutron scattering from high-quality YBa2Cu3O6.33 (YBCO6.33) single crystals with a Tc of 8.4 K shows no evidence of a coexistence of superconductivity with long-range antiferromagnetic order at this very low, near-critical doping of p~0.055. However
Externí odkaz:
http://arxiv.org/abs/1504.07942
Autor:
Chung, Sunjae, Lee, Sangyep, Yoo, Taehee, Lee, Hakjoon, Chung, J. -H., Choi, M. S., Lee, Sanghoon, Liu, X., Furdyna, J. K., Han, Jae-Ho, Lee, Hyun-Woo, Lee, Kyung-Jin
We report magnetoresistance data in magnetic semiconductor multilayers, which exhibit a clear step-wise behavior as a function of external field. We attribute this highly non-trivial step-wise behavior to next-nearest-neighbor interlayer exchange cou
Externí odkaz:
http://arxiv.org/abs/1209.1703
Autor:
Kim, J. -H., Matsuda, M., Ueda, H., Ueda, Y., Chung, J. -H., Tsutsui, S., Baron, A., Lee, S. -H.
Using inelastic x-ray scattering we have investigated lattice vibrations in a geometric frustrated system CdCr2O4 that upon cooling undergoes a spin-Peierls phase transition at TN = 7.8 K from a cubic and paramagnetic to a tetragonal and Neel state.
Externí odkaz:
http://arxiv.org/abs/1106.0392
Autor:
Kim, J. -H., Vegte, M. A. van. der., Scaramucci, A., Artyukhin, S., Chung, J. -H., Park, S., Cheong, S. -W., Mostovoy, M., Lee, S. -H.
We studied magnetic excitations in a low-temperature ferroelectric phase of the multiferroic YMn2O5 using inelastic neutron scattering (INS). We identify low-energy magnon modes and establish a correspondence between the magnon peaks observed by INS
Externí odkaz:
http://arxiv.org/abs/1008.5354
Autor:
Stock, C., Jonas, S., Broholm, C., Nakatsuji, S., Nambu, Y., Onuma, K., Maeno, Y., Chung, J. -H.
Publikováno v:
Phys. Rev. Lett. 105, 037402 (2010)
Neutron scattering is used to investigate spin correlations in ultra pure single crystals of the S=1 triangular lattice NiGa2S4. Despite a Curie-Weiss temperature of Theta_CW=-80(2) K, static (tau > 1 ns) short range (xi_ab=26(3) \AA) incommensurate
Externí odkaz:
http://arxiv.org/abs/1006.3238
Publikováno v:
Phys. Rev. B 79, 184514 (2009)
Using neutron scattering, we investigate the effect of a magnetic field on the static and dynamic spin response in heavily underdoped superconducting YBa$_{2}$Cu$_{3}$O$_{6+x}$ (YBCO$_{6+x}$) with x=0.33 (T$_{c}$=8 K) and 0.35 (T$_{c}$=18 K). In cont
Externí odkaz:
http://arxiv.org/abs/0903.3172
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Autor:
Chung, J. -H., Chung, S. J., Lee, Sanghoon, Kirby, B. J., Borchers, J. A., Cho, Y. J., Liu, X., Furdyna, J. K.
We use neutron reflectometry to investigate the interlayer exchange coupling between Ga$_{0.97}$Mn$_{0.03}$As ferromagnetic semiconductor layers separated by non-magnetic Be-doped GaAs spacers. Polarized neutron reflectivity measured below the Curie
Externí odkaz:
http://arxiv.org/abs/0809.0955
Autor:
Kim, J. -H., Lee, S. -H., Park, S. I., Kenzelmann, M., Schefer, J., Chung, J. -H., Majkrzak, C. F., Takeda, M., Wakimoto, S., Park, S. Y., Cheong, S-W., Matsuda, M., Kimura, H., Noda, Y., Kakurai, K.
By combining neutron four-circle diffraction and polarized neutron diffraction techniques we have determined the complex spin structures of a multiferroic, YMn2O5, that exhibits two ferroelectric phases at low temperatures. The obtained magnetic stru
Externí odkaz:
http://arxiv.org/abs/0803.1123
Temperature dependencies of gap energies and magnon lifetimes are measured in the quasi-1-dimensional S=1/2 gapped quantum magnets IPA-CuCl3 and Sul-Cu2Cl4 using inelastic neutron scattering. The results are compared to those found in literature for
Externí odkaz:
http://arxiv.org/abs/0711.4094