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Displaying 1 - 25 of 37

Geometrical Frustration Versus Kitaev Interactions in BaCo 2 (AsO 4 ) 2

January 10, 2023
Author(s)
Thomas Halloran, Felix Desrochers, Emily Zhang, Tong Chen, Li E. Chern, Zhijun Xu, Barry Winn, Melissa Graves-Brook, M. B. Stone, Alexander I. Kolesnikov, Yiming Qiu, Ruidan Zhong, Robert Cava, Yong Kim, Collin L. Broholm
Recently, Co-based honeycomb magnets have been proposed as promising candidate materials to host the Kitaev spin liquid state. One of the front-runners is BaCo 2(AsO 4) 2 (BCAO), where it was suggested that the exchange processes between Co 2+ ions via the

Effect of Iron Vacancies on Magnetic Order and Spin Dynamics of the Spin Ladder BaFe 2-d S 1.5 Se 1.5

June 13, 2022
Author(s)
Zengjia Liu, Xiao-Sheng Ni, Lisi Li, Hualei Sun, Feixiang Liang, Benjamin Frandsen, Andrew D. Christianson, Clarina dela Cruz, Zhijun Xu, Dao-Xin Yao, Jeffrey Lynn, Robert J. Birgeneau, Kun Cao, Meng Wang
Quasi-one-dimensional iron chalcogenides possess various magnetic states depending on the lattice distortion, electronic correlations, and presence of defects. We present neutron diffraction and inelastic neutron scattering experiments on the spin ladder

Highly Tunable Magnetic Phases in Transition-Metal Dichalcogenide Fe 1/3+d NbS 2

April 5, 2022
Author(s)
Shan Wu, Zhijun Xu, Shannon Haley, Sophie Weber, Arani Acharya, Eran Maniv, Yiming Qiu, A. A. Aczel, Nicholas S. Settineri, Jeffrey Neaton, James Analytis, Robert Birgeneau
Layered transition metal dichalcogenides (TMDCs) host a plethora of interesting physical phenomena ranging from charge order to superconductivity. By introducing magnetic ions into 2H-NbS 2, the material forms a family of magnetic intercalated TMDCs T xNbS

Growth and Characterization of Large (Y,La)TiO 3 and (Y,Ca)TiO 3 Single Crystals

December 29, 2021
Author(s)
Sajna Hameed, Joseph Joe, Laxman Thoutam, Javier Garcia Barriocanal, Biqiong Yu, Guichuan Yu, Songxue Chi, Tao Hong, Travis Williams, John W. Freeland, Peter M. Gehring, Zhijun Xu, Masaaki Matsuda, Bharat Jalan, Martin Greven
The Mott-insulating rare-earth titanates (RTiO 3, R being a rare-earth ion) are an important class of materials that encompasses interesting spin-orbital phases, ferromagnet-antiferromagnet and insulator-metal transitions. The growth of these materials has

Two-Dimensional Overdamped Fluctuations of the Soft Perovskite Lattice in CsPbBr 3

July 1, 2021
Author(s)
T. Lanigan-Atkins, X. He, M. Krogstad, D. M. Pajerowski, D. Abernathy, Guangyong Xu, Zhijun Xu, D.-Y. Chung, M. G. Kanatzidis, S. Rosenkranz, R. Osborn, O. Delaire
Lead halide perovskites exhibit structural instabilities and large atomic fluctuations thought to impact their optical and thermal properties, yet detailed structural and temporal correlations of their atomic motions remain poorly understood. Here, these

Electron-Phonon Coupling and Superconductivity in the Doped Topological Crystalline Insulator (Pb 0.5 Sn 0.5 _) 1-x In x Te

September 23, 2020
Author(s)
A. Sapkota, Y. Li, B. L. Winn, A. Podlesnyak, Guangyong Xu, Zhijun Xu, Kejing Ran, Tong Chen, Jian Sun, Jinsheng Wen, Lihua Wu, Jihui Yang, Qiang Li, G. D. Gu, J. M. Tranquada
We present a neutron scattering study of phonons in single crystals of (Pb 0.5Sn 0.5) 1−xIn xTe with x = 0 (metallic, but nonsuperconducting) and x = 0.2 (nonmetallic normal state, but superconducting). We map the phonon dispersions (more completely for x

Structural, Magnetic, and Electronic Evolution of the Spin-Ladder System BaFe 2 S 3-x Se x with Isoelectronic Substitution

June 12, 2020
Author(s)
Jia Yu, Meng Wang, Benjamin A. Frandsen, Hualei Sun, Junjie Yin, Zengjia Liu, Shan Wu, Ming Yi, Zhijun Xu, Arani Acharya, Qingzhen Huang, Edith Bourret-Courchesne, Jeffrey W. Lynn, Robert J. Birgeneau
We report experimental studies of a series of BaFe 2S 3-xSe x (0less than or equal to}xless than or equal to}3) single crystals and powder specimens using x-ray diffraction, neutron diffraction, muon spin relaxation, and electrical transport measurements

Topological Singularity Induced Chiral Kohn Anomaly in a Weyl Semimetal

June 11, 2020
Author(s)
Thanh Nguyen, Fei Han, Nina Andrejevic, Ricardo Pablo-Pedro, Anju Apte, Yoichiro Tsurimaki, Zhiwei Ding, Kunyan Zhang, Ahmet Alatas, Ercan E. Alp, Songxue Chi, Jaime Fernandez-Baca, Masaaki Matsuda, David Alan Tennant, Yang Zhao, Zhijun Xu, Jeffrey W. Lynn, Shengxi Huang, Mingda Li
The electron-phonon interaction (EPI) is instrumental in a wide variety of phenomena in solid state physics, such as electrical resistivity in metals [1], carrier mobility, optical transition and polaron effects in semiconductors [2,3], lifetime of hot

Correlating Magnetic Structure and Magnetotransport in Semimetal Thin Films of Eu 1-x Sm x TiO 3

May 15, 2020
Author(s)
Zach Porter, Ryan F. Need, Kaveh Ahadi, Yang Zhao, Zhijun Xu, Brian Kirby, Jeffrey W. Lynn, Susanne Stemmer, Stephen D. Wilson
We report on the evolution of the average and depth-dependent magnetic order in thin film samples of biaxially stressed and electron-doped EuTiO 3 for samples across a doping range 20 cm −3. Under an applied in-plane magnetic field, the G-type

Observation of a C-type Short-Range Antiferromagnetic Order in Lyaer Spacing Expanded FeS

March 9, 2020
Author(s)
Meng Wang, Ming Yi, Benjamin A. Frandsen, Junjie Yin, Hualei Sun, Zhijun Xu, Huibo Cao, Edith Bourret-Courchesne, Jeffrey W. Lynn, Robert J. Birgeneau
We report neutron diffraction studies of FeS single crystals obtained from Rb xFe 2-yS 2 single crystals via a hydrothermal method. While no √5 x √5 iron vacancy order or block antiferromagnetic order typical of RRb xFe 2-yS 2 is found in our samples, we

Electric Field Effect on Short-Range Polar Order in a Relaxor Ferroelectric System

July 30, 2019
Author(s)
Zhijun Xu, Fei Li, Shujun Zhang, Christopher Stock, Jun Luo, Peter M. Gehring, Guangyong Xu
Short-range polar orders in the relaxor ferroelectric material PbMg 1/2Nb 2/3O 3-28%PbTiO 3 (PMN-28PT) have been studied using neutron diffuse scattering. An external electric field along [110] direction can affect the diffuse scattering in the low

Comment on "Giant Electromechanical Coupling of Relaxor Ferroelectrics Controlled by Polar Nanoregion Vibrations"

March 22, 2019
Author(s)
Peter M. Gehring, Zhijun NMN Xu, C. Stock, Guangyong NMN Xu, Daniel E Parshall, Leland Weldon Harriger, C. A. Gehring, Xiaobing Li, Haosu Luo
Manley et al. (Science Advances, 16 September 2016, p.e1501814) report a splitting of a transverse acoustic phonon branch below T c in the relaxor ferroelectric Pb[(Mg 1/3Nb 2/3) 1-xTi x]O 3 with x=0.30 using neutron scattering methods. They argue that