Guangyong Xu

Publications

Coexistence of Superconductivity and Short-Range Double-Stripe Spin Correlations in Te-Vapor Annealed FeTe_1-xSe_x (X {less than or equal to} 0.2)

June 14, 2018

Author(s):

Zhijun NMN Xu, J. A. Schneeloch, Ming Yi, Yang Zhao, Masaaki Matsuda, D. M. Pajerowski, Songxue Chi, R. J. Birgeneau, Genda Gu, J. M. Tranquada, Guangyong NMN Xu

In as-grown bulk crystals of Fe 1+y Te 1-x Se x with x {less than or equal to} 0.3, excess Fe (y>0) is inevitable and correlates with a suppression of...

Depth Dependant Element Analysis of PbMg_1/3Nb_2/3O₃ using Muonic X-rays

February 28, 2018

Author(s):

Katherine L Brown, Chris PJ Stockdale, Haosu Luo, X Zhao, Jiefang Li, Dwight Viehland, Guangyong NMN Xu, Peter M. Gehring, K Ishida, A. D. Hillier, C. Stock

The relaxor PbMg 1.3 Nb 2/3 O 3 (PMN) has received attention due to its potential applications as a piezoelectric when doped with PbTiO3 (PT). Previous results...

Spontaneous Decay of a Soft Optical Phonon in the Relaxor Ferroelectric PbMg_1/3Nb_2/3O₃

February 13, 2018

Author(s):

C. Stock, Peter M. Gehring, R. A. Ewings, Guangyong NMN Xu, Jiefang Li, Dwight Viehland, Haosu Luo

We report the spontaneous decay of a soft, optical phonon in a solid. Using neutron spectroscopy, we find that specific phonon lifetimes in the relaxor PbMg 1/...

Phase Competition in the Palmer-Chalker XY Pyrochlore Er₂Pt₂O₇

October 30, 2017

Author(s):

A. M. Hallas, J. Gaudet, Nicholas P. Butch, Guangyong NMN Xu, M. Tachibana, C. R. Wiebe, Graeme M. Luke, Bruce D. Gaulin

We report neutron scattering measurements on Er 2 Pt 2 O 7 , a new addition to the XY family of frustrated pyrochlore magnets. Symmetry analysis of our elastic...

Surprising Loss of Three-Dimensionality in Low-Energy Spin Correlations on Approaching Superconductivity in Fe_1+yTe_1-xSe_x

October 06, 2017

Author(s):

Zhijun NMN Xu, J. A. Schneeloch, Jinsheng Wen, B. L. Winn, G. E. Granroth, Yang Zhao, Genda Gu, I. Zaliznyak, J. M. Tranquada, R. J. Birgeneau, Guangyong NMN Xu

We report inelastic neutron scattering measurements of low energy (hw{approximately less than} 10 meV) magnetic excitations in the "11" system Fe 1+y Te 1-x Se...