Pengcheng Dai, a professor in the Physics Department, published a paper in Nature on high-temperature superconductors that was deemed a “Current Classic” by ScienceWatch in October 2009. Superconductors carry current with no resistance at increasingly high temperatures. Dai’s paper, “Magnetic order close to superconductivity in the iron-based layered La(O1-xFx)FeAs systems,” aims to explain why, zeroing in on magnetism as a key factor. Dai is featured in a podcast on the ScienceWatch website. “Current Classics” are papers that have the greatest absolute increase in cumulative citations from the previous bimonthly period to the present.
Dai holds a bachelor’s degree in physics from Zhengzhou University and a Ph.D. in physics from the University of Missouri. In July 2003 he was named an Outstanding Young Researcher by the Overseas Chinese Physics Association. In the fall of 2008, he was named to a Chair of Excellence for the UT-Oak Ridge National Laboratory Joint Institute for Advanced Materials, “for his pioneering work in elucidating the origin of the novel functionality in correlated electron materials using neutron scattering.” Dai is a fellow of the American Physical Society and the author of more than 110 publications, publishing 29 papers since January 2008.
“Transition from three-dimensional anisotropic spin excitations to two-dimensional spin excitations by electron doping the FeAs-based BaFe1.96Ni0.04As2 superconductor,” Leland W. Harriger, Astrid Schneidewind, Shiliang Li, Jun Zhao, Zhengcai Li, Wei Lu, Xiaoli Dong, Fang Zhou, Zhongxian Zhao, Jiangping Hu, and Pengcheng Dai, Phys. Rev. Lett., 103: 087005 (2009).
“Spin waves and magnetic exchange interactions in CaFe2As2,” Jun Zhao, D. T. Adroja, Dao-Xin Yao, R. Bewley, Shiliang Li, X. F. Wang, G. Wu, X. H. Chen, Jiangping Hu & Pengcheng Dai, Nature Physics, 5: 555-560 (2009).
“Inelastic neutron-scattering measurements of a three-dimensional spin resonance in the FeAs-based BaFe1.9Ni0.1As2 superconductor,” Songxue Chi, Astrid Schneidewind, Jun Zhao, Leland W. Harriger, Linjun Li, Yongkang Luo, Guanghan Cao, Zhu’an Xu, Micheal Loewenhaupt, Jiangping Hu, and Pengcheng Dai, Phys. Rev. Lett., 102: 107006 (2009).
“Magnetic order close to superconductivity in the iron-based layered La(O1-xFx)FeAs systems,” Clarina de la Cruz, Q. Huang, J. W. Lynn, Jiying Li, W. Ratcliff II, J. L. Zarestky, H. A. Mook, G. F. Chen, J. L. Luo, N. L. Wang & Pengcheng Dai Nature, 453: 899-902 (2008).
“Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity,” Jun Zhao, Q. Huang, Clarina de la Cruz, Shiliang Li, J. W. Lynn, Y. Chen, M. A. Green, G. F. Chen, G. Li, Z. Li, J. L. Luo, N. L. Wang, and Pengcheng Dai, Nature Materials 7: 953 (2008) and News and Views, Nature Materials, 7: 927 (2008) .
“Low energy spin waves and magnetic interactions in SrFe2As2,” Jun Zhao, Dao-Xin Yao, Shiliang Li, Tao Hong, Y. Chen, S. Chang, W. Ratcliff II, J. W. Lynn, H. A. Mook, G. F. Chen, J. L. Luo, N. L. Wang, E. W. Carlson, Jiangping Hu, Pengcheng Dai, Phys. Rev. Lett., 101: 167203 (2008).
“Spin and lattice structure of single crystal SrFe2As2,” Jun Zhao, W. Ratcliff II, J. W. Lynn, G. F. Chen, J. L. Luo, N. L. Wang, Jiangping Hu, and Pengcheng Dai, Phys. Rev. B, 78: 14504(R) (2008).
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