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Search Publications by: Yang Zhao (Assoc)

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Displaying 76 - 100 of 103

Spin Waves and Spatially Anisotropic Exchange Interactions in the S = 2 Stripe Antiferromagnet Rb 0.8 Fe 1.5 S 2

July 13, 2015
Author(s)
Meng Wang, P. Valdivia, Ming Yi, J. X. Chen, W. L. Zhang, R. A. Ewings, T. G. Perring, Yang Zhao, Leland Harriger, Jeffrey W. Lynn, E. Bourret-Courchesne, Pengcheng Dai, D. H. Lee, D. X. Yao, R. J. Birgeneau
An inelastic neutron scattering study of the spin waves corresponding to the stripe antiferromagnetic order in insulating Rb 0.8Fe 1.5S 2 throughout the Brillouin zone is reported. The spin wave spectra are well described by a Heisenberg Hamiltonian with

Neutron Spin Resonance as a Probe of Superconducting Gap Anisotropy in Partially Detwinned Electron Underdoped NaFe 0.985Co d0.015^As

June 9, 2015
Author(s)
Chenglin Zhang, J. T. Park, Xingye Lu, Rong Yu, Yu Li, Wenliang Zhang, Yang Zhao, Jeffrey W. Lynn, Qimiao Si, Pengcheng Dai
We use inelastic neutron scattering (INS) to study spin excitations in detwinned NaFe 0.985Cod0.015^As which has coexisting static antiferromagnetic (AF) order and superconductivity (T c=15 K, T N = 30 K). In previous INS work on twinned sample, spin

Quasi-Two-Dimensional Spin and Phonon Excitations in La 1.965 Ba 0.035 CuO 4

June 3, 2015
Author(s)
J. J. Wagman, Daniel E. Parshall, M. B. Stone, A. T. Savici, Yang Zhao, H. A. Dabkowska, B. D. Gaulin
We present time-of-flight inelastic neutron scattering measurements of La 1.965Ba 0.035Cu) 4 (LBCO), a lightly doped member of the high temperature superconducting La-based cuprate family. By using time-of-flight neutron instrumentation coupled with single

Magnetic Order in a-RuCl 3 : A Honeycomb-Lattice Quantum Magnet with Strong Spin-Orbit Coupling

April 24, 2015
Author(s)
J. A. Sears, M. Songvilay, K. W. Plumb, J. P. Clancy, Yiming Qiu, Yang Zhao, Daniel E. Parshall, Young-June Kim
We report magnetic and thermodynamic properties of single crystal α-RuCl 3, in which the Ru 3+ (4d 5) ion is in its low spin state and forms a honeycomb lattice. Two features are observed in both magnetic susceptibility and specific heat data; a sharp peak

Substitution of Ni for Fe in Superconducting Fe 0.98 Te 0.5 Se 0.5 Depresses the Normal-State Conductivity but not the Magnetic Spectral Weight

January 5, 2015
Author(s)
Jinghui Wang, Ruidan Zhong, Shichao Li, Yuan Gan, Zhijun Xu, Cheng Zhang, T Ozaki, M. Matsuda, Yang Zhao, Qiang Li, Guangyong Xu, Genda Gu, J. M. Tranquada, R. J. Birgeneau, Jinsheng Wen
We have performed systematic resistivity and inelastic neutron scattering measurements on Fe 0.98-zNi zTe 0.5Se 0.5 samples to study the impact of Ni substitution on the transport properties and the low-energy (less than or equal to} 12 meV) magnetic

Polaron-Mediated Spin Correlations in Metallic and Insulating La 1-x A x MnO 3 (A=Ca,Sr, or Ba)

December 3, 2014
Author(s)
Joel Helton, Daniel M Pajerowski, Yiming Qiu, Yang Zhao, Dmitry A. Shulyatev, Yakov M. Mukovskii, Georgii L. Bychkov, Sergei N. Barilo, Jeffrey W. Lynn
Neutron spectroscopy measurements reveal short-range spin correlations near and above the ferromagnetic-paramagnetic phase transition in manganite materials of the form La 10zA xMnO 3, including samples with an insulating ground state as well as colossal

Origin of the Charge Gap in LaMnPO

November 18, 2014
Author(s)
D. E. McNally, J. W. Simonson, K. W. Post, Z. P. Yin, M. Pezzoli, G. J. Smith, V. Leyva, C. Marques, L. DeBeer-Schmitt, A. I. Kolesnikov, Yang Zhao, Jeffrey W. Lynn, D. N. Basov, G. Kotliar, M. C. Aronson
We present inelastic neutron scattering and magnetization measurements of the antiferromagnetic insulator LaMnPO that are well described by a Heisenberg spin model. These measurements are consistent with the presence of two-dimensional magnetic

The Suppression of Curie Temperature by Sr Doping in Diluted Ferromagnetic Semiconductor (La 1-x Sr x )(Zn 1-y MnYdy^)AsO

July 7, 2014
Author(s)
Cui Ding, Xin Gong, Huiyuan Man, Guoxiang Zhi, Shengli Guo, Yang Zhao, Hangdong Wang, Bin Chen, F.L. Ning
(La 1-xSr x)(Zn 1-yMndy^)AsO is a two dimensional diluted ferromagnetic semiconductor that has advantage of decoupled charge and spin doping. The substitution of Sr 2+ for La 3+ and Mn 2+ for Zn 2+ into parent semiconductor LaZnAsO introduces hole carriers

Magnetic Structure of the Conductive Triangular-Lattice Antiferromagnet PdCrO 2

March 11, 2014
Author(s)
Hiroshi Takatsu, Gwilherm Nenert, Hiroaki Kadowaki, Hideki Yoshizawa, Mechthild Enderle, Shingo Yonezawa, Yoshiteru Maeno, Jungeun Kim, Naruki Tsuji, Masaki Takata, Yang Zhao, Mark Green, Collin Broholm
We performed neutron single crystal and synchrotron X-ray powder diffraction experiments in order to investigate the magnetic and crystal structures of the conductive layered triangular-lattice antiferromagnet PdCrO6d2^ with a putative spin chirality

Ghost Modes and Continuum Scattering in the Dimerized Distorted Kagome Lattice Antiferromagnet Rb 2 Cu 3 SnF 12

January 21, 2014
Author(s)
K. Matan, Y. Nambu, Yang Zhao, T.J. Sato, Y. Fukumoto, T. Ono, H. Tanaka, Collin L. Broholm, A. Podlesnyak, G. Ehlers
Magnetic excitations of the pinwheel valence bond solid state in the distorted kagome lattice antiferromagnet Rb 2Cu 3SnF 12 were studied using high-resolution inelastic neutron scattering. A weakly dispersive mode around 5 meV and duplicate triplet

Interplay Between the Magnetic and Electric Degrees of Freedom in Multiferroic Co 3 TeO 6

March 28, 2012
Author(s)
Wen-Hsien Li, Chin-Wei Wang, Daniel Hsu, Chi-Hung Lee, Chun-Ming Wu, Chih-Chieh Chou, Hung-Duen Yang, Yang Zhao, Sung Chang, Jeffrey W. Lynn, Helmuth Berger
Neutron diffraction, magnetic susceptibility, specific heat, and dielectric constant measurements of single crystal Co 3TeO 6 have been measured to study the interplay between the ferroelectricy and magnetic order. Long range incommensurate magnetic order

Double-Focusing Thermal Triple-Axis Spectrometer at the NCNR

February 2, 2012
Author(s)
Y. Chen, Sung Chang, Yang Zhao, Songxue Chi, William D. Ratcliff, B. G. Ueland, Ross Erwin
The new thermal triple-axis spectrometer at the NIST Center for Neutron Research (NCNR) is located at the BT-7 beam port. The 165 mm diameter reactor beam is equipped with a selection of Söller collimators, beam-limiters, and pyrolytic graphite (PG) filter
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