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- Shiyong Tan, Yan Zhang, +14 authors Donglai Feng
- Nature materials
- 2013

The record superconducting transition temperature (T(c)) for the iron-based high-temperature superconductors (Fe-HTS) has long been 56 K. Recently, in single-layer FeSe films grown on SrTiO3 substrates, indications of a new record of 65 K have been reported. Using in situ photoemission measurements, we substantiate the presence of spin density waves (SDWs)… (More)

- Chen Fang, Hong Yao, Wei-Feng Tsai, JiangPing Hu, Steven A. Kivelson
- 2008

We study a spin S quantum Heisenberg model on the Fe lattice of the rare-earth oxypnictide superconductors. Using both large S and large N methods, we show that this model exhibits a sequence of two phase transitions: from a high-temperature symmetric phase to a narrow region of intermediate “nematic” phase, and then to a low-temperature spin ordered phase.… (More)

- Bogdan A Bernevig, Jiangping Hu, Nicolaos Toumbas, Shou-Cheng Zhang
- Physical review letters
- 2003

We construct a generalization of the quantum Hall effect where particles move in an eight-dimensional space under an SO(8) gauge field. The underlying mathematics of this particle liquid is that of the last normed division algebra, the octonions. Two fundamentally different liquids with distinct configuration spaces can be constructed, depending on whether… (More)

- Kangjun Seo, B Andrei Bernevig, Jiangping Hu
- Physical review letters
- 2008

We study the pairing symmetry of a two-orbital J1-J2 model for FeAs layers in oxypnictides. We show that the mixture of an intraorbital unconventional s_{x;{2}y;{2}} approximately cos(k_{x})cos(k_{y}) pairing symmetry, which changes sign between the electron and hole Fermi surfaces, and a very small d_{x;{2}-y;{2}} approximately cos(k_{x})-cos(k_{y})… (More)

- J. Zhao, W. Ratcliff, +10 authors Pengcheng Dai
- 2008

Jun Zhao,1 W. Ratcliff II,2 J. W. Lynn,2 G. F. Chen,3 J. L. Luo,3 N. L. Wang,3 Jiangping Hu,4 and Pengcheng Dai1,5,* 1Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996-1200, USA 2NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6012, USA 3Beijing… (More)

In this work we investigate collective excitations at the boundary of a recently constructed 4D quantum Hall state. Local bosonic operators for creating these collective excitations can be constructed explicitly. Massless relativistic wave equations with helicity S can be derived exactly for these operators from their Heisenberg equation of motion. For the… (More)

- M. M. Parish, J. P. Hu, B. A. Bernevig, Meera M. Parish, Jiangping Hu, Andrei Bernevig
- 2008

The experimental consequences of different order parameters in iron-based superconductors are theoretically analyzed. We consider both nodeless and nodal order parameters, with emphasis on the cos kx cos ky nodeless order parameter recently derived by Seo et al. arXiv:0805.2958, Phys. Rev. Lett. to be published . We analyze the effect of this order… (More)

- J. P. Hu, M. Calomme, +4 authors D. A. Vanden Berghe
- Biological Trace Element Research
- 1995

The superoxide scavenging activities of 12 flavonoids were measured. The superoxide anions were generated by a hypoxanthine-xanthine oxidase system and measured by the nitrite method. The results showed that the scavenging ability enhanced with an increasing number of hydroxyl groups in rings B. Substitution at C3 position with a hydroxyl group increased… (More)

- Defa Liu, Wenhao Zhang, +21 authors X J Zhou
- Nature communications
- 2012

The recent discovery of high-temperature superconductivity in iron-based compounds has attracted much attention. How to further increase the superconducting transition temperature (T(c)) and how to understand the superconductivity mechanism are two prominent issues facing the current study of iron-based superconductors. The latest report of high-T(c)… (More)

- S. L. Li, J. P. Hu, +14 authors Pengcheng Dai
- 2013