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Search Publications by: Yang Zhao (Assoc)

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Displaying 51 - 75 of 103

Phase Diagram of a-RuCl 3 in an In-Plane Magnetic Field

May 31, 2017
Author(s)
J. A. Sears, Yang Zhao, Zhijun Xu, Jeffrey W. Lynn, Young-June Kim
The low-temperature magnetic phases in the layered honeycomb lattice material α-RuCl 3 have been studied as a function of in-plane magnetic field. In zero field this material orders magnetically below 7 K with so-called zigzag order within the honeycomb

Sodium Layer Chiral Distribution and Spin Structure of Na 2 Ni 2 TeO 6 with a Ni Honeycomb Lattice

March 8, 2017
Author(s)
Sunil K. Karna, Yang Zhao, R. Sankar, M. Avdeev, P. C. Tseng, C. W. Wang, G. J. Shu, K. Matan, G. Y. Guo, F. C. Chou
The crystal structure of P2-type Na 2Ni 2TeO 6 is best described as layers that are composed of Te-centered edge-sharing NiO 6 octahedra in honeycomb lattice with intercalated Na ions in the van der Waals (vdW) gaps. Although the crystal symmetry has been

Uniaxial Pressure Effect on the Magnetic Ordered Moment and Transition Temperatures in BaFe 2-x T x As 2 (T=Co,Ni)

February 17, 2017
Author(s)
David W. Tam, Yu Song, Haoran Man, Sky C. Cheung, Zhiping Yin, Xingye Lu, Weiyi Wang, Benjamin A. Frandsen, Lian Liu, Zizhou Gong, Takashi U. Ito, Yipeng Cai, Murray N. Wilson, Shengli Guo, Keisuke Koshiishi, Wei Tian, Bassam Hitti, Alexandre Ivanov, Yang Zhao, Jeffrey W. Lynn, Graeme M. Luke, Tom Berlijn, Thomas A. Maier, Yasutomo J. Uemura, Pengcheng Dai
We use neutron diffraction and muon spin relaxation to study the effect of uniaxial pressure on the paramagnetic-to-antiferromagnetic phase transition (T N) in BaFe 2As 2 and superconducting BaFe 1.915Ni 0.085As 2. In a local moment picture, the uniaxial

Identification of the Low-Energy Excitations in a Quantum Critical System

December 20, 2016
Author(s)
Tom Heitmann, Jagat Lamsal, Shannon M. Watson, Ross Erwin, Wangchun Chen, Yang Zhao, Wouter Montfrooij
We have identified low-energy magnetic excitations in a doped quantum critical system by means of polarized neutron scattering experiments. The presence of these excitations could explain why Cd(Fe 0.76Ru 0.24) 2Ge 2 displays dynamical scaling in the

Distinct Magnetic Spectra in the Hidden Order and Antiferromagnetic Phases in URu 2-x Fe x Si 2

November 7, 2016
Author(s)
Nicholas P. Butch, Sheng Ran, Inho Jeon, Noravee Kanchanavatee, Kevin Huang, Alexander Breindel, M. Brian Maple, Ryan L. Stillwell, Yang Zhao, Leland Weldon Harriger, Jeffrey W. Lynn
We use neutron scattering to compare the magnetic excitations in the hidden order (HO) and antiferromagnetic (AFM) phases in URu 2-xFe xFe xSi 2 as a function of Fe concentration. The magnetic excitation spectra change significantly between x=0.05 and x=0

Forbidden Phonon: Dynamical Signature of Bond Symmetry Breaking in the Iron Chalcogenides

September 1, 2016
Author(s)
David M. Fobes, Igor A. Zaliznyak, John M. Tranquada, Zhijun Xu, Genda D. Gu, Xu-Gang He, Wei Ku, Yang Zhao, Masaaki Matsuda, V. Ovidiu Garlea, Barry Winn
Investigation of the inelastic neutron scattering spectra in Fe 1+yTe 1-xSe x near a signature wave vector Q = (1,0,0) for the bond-order wave (BOW) formation in parent compound Fe 1+yTe reveals an acoustic-phonon-like dispersion present in all structural

Magnetic Structure of Yb 2 Pt 2 Pb: Ising Moments on the Shastry-Sutherland Lattice

March 22, 2016
Author(s)
W. Miiller, L. S. Wu, M. S. Kim, T. Orvis, J. W. Simonson, M. Gamza, D. M. McNally, C. S. Nelson, G. Ehlers, A. Podlesnyak, Joel Helton, Yang Zhao, Yiming Qiu, John R. Copley, Jeffrey W. Lynn, I. Zaliznyak, M. C. Aronson
Neutron diffraction measurements were carried out on single crystals and powders of Yb 2Pt 2Pb, where Yb moments form planes of orthogonal dimers in the frustrated Shastry-Sutherland Lattice (SSL). Yb 2Pt 2Pb orders antiferromagnetically at T N=2.07 K, and

Neutron Scattering Studies of Spin-Phonon Hybridization and Superconducting Spin-Gaps in the High Temperature Superconductor La 2-x (Sr,Ba) x CuO 4

March 14, 2016
Author(s)
J.J. Wagman, J. P. Carlo, Jonathan Gaudet, G. Van Gastel, D. L. Abernathy, M. B. Stone, G. E. Granroth, A. I. Koleshnikov, A. T. Savici, Y. J. Kim, H. Zhang, D. Ellis, Yang Zhao, L. Clark, A. B. Kallin, E. Mazurek, H. A. Dabkowska, B. D. Gaulin
We present time-of- flight neutron-scattering measurements on single crystals of La 2-x^Ba xCuO 4 (LBCO) with 0 less than or equal to}xless than or equal to} 0:095 and La 2-xSr xCuO 4 (LSCO) with x = 0.08 and 0.11. This range of dopings spans much of the

The Synthesis and Characterization of 1111 Type Diluted Ferromagnetic Semiconductor (La 1-x Ca x )(Zn 1-x Mn x )AsO

December 17, 2015
Author(s)
Cui Ding, Shengli Guo, Yao Zhao, Huiyuan Man, Licheng Fu, Yilun Gu, Zhouyang Wang, L. Liu, B. A. Frandsen, S. Cheung, Y. J. Uemura, T. Goko, H. Luetkens, E. Morenzoni, Yang Zhao, F.L. Ning
We report the synthesis and characterization of a bulk form diluted magnetic semiconductor, (La 1-xCa x)(Zn 1-yMn y)AsO, with a two dimensional crystal structure isostructural to that of the 1111 type Fe-based high-temperature superconductor LaFeAsO and

Influence of Electron Doping on the Ground State of (Sr 1-x La x ) 2 IrO 4

August 17, 2015
Author(s)
Xiang Chen, Tom Hogan, D. Walkup, Wenwen Zhou, M. Pokharel, Mengliang Yao, Wei Tian, Thomas Z. Ward, Yang Zhao, Daniel E. Parshall, C. Opeil, Jeffrey W. Lynn, Vidya Madhavan, Stephen D. Wilson
The evolution of the electronic properties of electron-doped (Sr 1-xLa x) 2IrO 4 is experimentally explored as the solubility limit of La is approached. As electrons are introduced, the electronic ground state transitions from a spin-orbit Mott phase into