XiaoHang Zhang

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single crystals Xiaohang Zhang, Shanta R. Saha, Nicholas P. Butch, Kevin Kirshenbaum, Johnpierre Paglione, Richard L. Greene, Yong Liu, Liqin Yan, Yoon Seok Oh, Kee Hoon Kim, and Ichiro Takeuchi Department of Physics and CNAM, University of Maryland, College Park, Maryland 20742, USA Department of Physics and Astronomy, CSCMR & FPRD, Seoul National(More)
Terahertz pulses are applied as an all-optical bias to ferroelectric thin-film BiFeO3 while monitoring the time-dependent ferroelectric polarization through its nonlinear optical response. Modulations in the intensity of the second harmonic light generated by the film correspond to on-off ratios of 220× gateable on femtosecond timescales. Polarization(More)
We have fabricated c-axis Josephson junctions on single crystals of Ba1-xKxFe2As2 by using Pb as the counterelectrode in two geometries, planar and point contact. Junctions in both geometries show resistively shunted junction I-V curves below the T{C} of the counterelectrode. Microwave induced steps were observed in the I-V curves, and the critical currents(More)
This work reports a study of the nonlinear Hall effect (HE) in the semimetallic ferromagnet EuB(6). A distinct switch in its Hall resistivity slope is observed in the paramagnetic phase, which occurs at a single critical magnetization over a wide temperature range. The observation is interpreted as the point of percolation for entities of a more conducting(More)
Surface State of SmB6 Thin Films Seunghun Lee, Xiaohang Zhang, Yangang Liang, Sean W. Fackler, Jie Yong, Xiangfeng Wang, Johnpierre Paglione, Richard L. Greene, and Ichiro Takeuchi Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, USA Center for Nanophysics and Advanced Materials, Department of Physics,(More)
Electric-field (E-field) control of magnetism enabled by multiferroic materials has the potential to revolutionize the landscape of present memory devices plagued with high energy dissipation. To date, this E-field controlled multiferroic scheme has only been demonstrated at room temperature using BiFeO3 films grown on DyScO3, a unique and expensive(More)
In this paper, the self-organization evolution principle of the telecommunication industry which is regarded as a complex system is studied based on dissipative structure theory and taken into account of telecommunication industry’s characteristics and practical problems. First of all, the characteristic of the dissipative structure of the(More)
The spin polarization of EuB6 has been measured by using Andreev reflection spectroscopy. Analyses of the conductance spectra of the EuB6/Pb junctions yield a spin polarization of about 56%. The results demonstrate that the ferromagnetic EuB6 is not half-metallic. Combined with the Hall effect and magnetoresistivity data, the results indicate a semimetallic(More)
Xiaohang Zhang,1,* Bumsung Lee,2 Seunghyun Khim,2 Kee Hoon Kim,2 Richard L. Greene,1 and Ichiro Takeuchi3 1CNAM and Department of Physics, University of Maryland, College Park, Maryland 20742, USA 2CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, South Korea 3Department of Materials Science and Engineering, University(More)