刘清青： 女， 中科院物理所副研究员

　　 2006年3月中国科学院物理研究所获理学博士学位。2006年3月至2008年1月于北京大学物理学院博士后工作。2008年1月进入中国科学院物理研究所极端条件物理重点实验室工作，同年被聘为副研究员，期间曾多次赴日本冈山大学进行短期访问研究。

研究方向：高温超导及其关联体系化合物的新材料研制和奇异特性研究

研究经历：主要从事的工作是类钙钛矿结构化合物的高压极端条件合成和基本物性研究。在高压极端条件新型高温超导体的研制及物性研究方面率先得到了一系列有意义的研究结果，包括利用顶角氧掺杂机制，高压高温合成发现了Tc～39K的新的超导体Sr2CuO2+σCl2-x，为研究[CuO2]平面的准二维特性提供了一个新的理想材料体系。高压高温合成得到了单相的顶角氧部分填充型的Sr2CuO3+σ超导体，利用退火处理将Tc从75K提高到95K，这是在含单层[CuO2]平面的体系中得到的最高超导转变温度。高压高温合成得到了单相的顶角氧部分填充型的 Sr2CuO3+σ超导体，提出顶角氧有序化的促进Tc的掺杂机制 , 利用该机制在含单层[CuO2]平面的体系中得到95K的超导转变。利用高压高温多重条件首次合成了钙钛矿型的 BaRuO3，研究了其基本的物理性质，发现它是一个很好的铁磁金属。在上述研究工作的基础上，合作发表学术论文二十多篇，申请新材料专利多项。

近几年发表的文章:

1. Y. Yu, Q.Q. Liu , C.Q. Jin, Y.C. Li, X.D. Li, J. Liu, “Pressure tuned crystal structure in NdBa 2 Cu 3 O 6+ δ superconductor”, Physic C 469, 843 845(2009).

2. S. J. Zhang, X. C. Wang, R. Sammynaiken, J. S. Tse, L. X. Yang, Z. Li, Q. Q. Liu , S. Desgreniers, Y. Yao, H. Z. Liu and C. Q. Jin, “Effect of pressure on the iron arsenide superconductor Li x FeAs (x=0.8, 1.0, 1.1)”, Phys. Rev. B 80, 014506 (2009).

3. C.-Q. Jin, J.-S. Zhou, J. B. Goodenough, Q. Q. Liu , J. G. Zhao, L. X. Yang, Y.Yu, R. C. Yu, T. Katsura, A. Shatskiy, and E. Ito ，“ High-pressure synthesis of the cubic perovskite BaRuO 3 and evolution of ferromagnetism in ARuO 3 (A = Ca,Sr,Ba) ruthenates ”， Proc. Natl. Acad. Sci. USA, 105 , 7115 (2008).

4. J. -S. Zhou, K. Matsubayashi, Y. Uwatoko, C. -Q. Jin, J.-G. Cheng, J. B. Goodenough, Q. Q. Liu , T. Katsura, A. Shatskiy, and E. Ito, “Critical Behavior of the Ferromagnetic Perovskite BaRuO 3 ” Phys. Rev. Lett., 101 , 077206 (2008).

5. X. C. Wang, Q. Q. Liu , Y. X. Lv, W. B. Gao, L. X. Yang, R. C. Yu, F.Y. Li, C.Q. Jin, “The superconductivity at 18 K in LiFeAs system ” , Solid State Communications 148, 538 (2008).

6. Q. Q. Liu , F. R. Wang, F. Y. Li, L. C. Chen, R. C. Yu, C. Q. Jin, Y. C. Li, J. Liu, “ Synthesis and structure study of Sr 2 CuO 3+δ superconductor under high pressure” ， Chin. Phys. Lett. 25, 2239 (2008).

7. Q. Q. Liu , F. R. Wang, F. Y. Li, L. C. Chen, R. C. Yu, C. Q. Jin, Y. C. Li, J. Liu, “High pressure effects on the crystal structure and electric conductivity of perovskite like (Ca/Sr) 2 CuO 2 Cl 2 compounds”, Chin. Sci. Bull. 53 (18), 2739 (2008).

8. Q. Q. Liu , H Yang, L X Yang, Y Yu, W B Gao, F Y Li, R C Yu, C Q Jin,, S Uchida, High pressure effects on high Tc superconductivity: the enhancement of superconducting transition temperature by ordering, Journal of Physics: Conference Series 121, 052012 (2008).

9. Q. Q. Liu , H. Yang, X. M. Qin, L. X. Yang, F. Y. Li, Y. Yu, R. C. Yu, C. Q. Jin, S. Uchida, “Correlation of superconductivity with the ordering state at the apical oxygen layer in the Sr 2 CuO 3+δ superconductor”, Physica C 460 , 56(2007).

10. Q. Q. Liu , H. Yang, Y. Yu, L. X. Yang, F. Y. Li, R. C. Yu, C. Q. Jin , S. Uchida, “The superconductivity up to 95 K by tuning order state in Sr 2 CuO 3+delta ”, Physica C 463 , 100 (2007)..

11. Q. Q. Liu , X. M. Qin, H. Yang, Y. Yu, L. X. Yang, F.Y. Li, R. C. Yu, C. Q. Jin, “A new 0201-type Sr 2 CuO 2+delta Cl2-y superconductor synthesized using "apical oxygen doping" method” Physica C 460, 58 (2007).

12. C. Q. Jin, Q. Q. Liu , H. Yang, L. X .Yang, R. C. Yu, F. Y. Li, “High pressure studies of high Tc superconductors in A-Cu-O system: The role of apical oxygen”, Physica C 460, 178 (2007).

13. H. Yang, Q. Q. Liu , F. Y. Li, C. Q. Jin, R. C. Yu, “TEM and EELS characterization of a Sr 2 CuO 3+delta superconductor post-annealed at different temperatures: enhancement of T-c by apical oxygen reordering”, Superconductor Science &Technology 20 (10), 904 (2007).

14. H. Yang, Q. Q. Liu , F. Y. Li, C. Q. Jin, R. C. Yu, “Electron energy-loss spectroscopy of Sr 2 CuO 2+delta Cl 2-y overdoping and role of apical oxygen for high Tc superconductivity”, Physica C 453, 80 (2007).

15. H. Yang, Q. Q. Liu , F. Y. Li, C. Q. Jin, R. C. Yu , “TEM and EELS studies of Sr 2 CuO 3+delta (nominal delta=0.1-0.4): Effect of apical oxygen ordering on T-C of cuprate superconductors”, Physica C 467, 59 (2007).

16. Q. Q. Liu , H. Yang, X. M. Qin, Y. Yu, L. X. Yang, F. Y. Li, R. C. Yu, C. Q. Jin, S. Uchida, “Enhancement of the superconducting critical temperature of Sr 2 CuO 3+delta up to 95 K by ordering dopant atoms”, Phys. Rev. B 74 (10) , 100506 (Rapid Commu) (2006).

17. H. Yang, Q. Q. Liu , F. Y. Li, C. Q. Jin, R. C. Yu, “Symmetry of unoccupied electronic states in the high-T-c superconductor Sr 2 CuO 2+delta Cl 2-y studied by electron energy-loss spectroscopy”, Applied Physics Letters 88(8) , 082502 (2006).

18. H. Yang, Q. Q. Liu , F. Y. Li, C. Q. Jin, R. C. Yu, “Structure and microstructure of superconductor Sr 2 CuO 3+delta (nominal delta=0.4) prepared under high pressure”, Superconductor Science &Technology 19(9), 934 (2006).

19. H. Yang, Q. Q. Liu , F. Y. Li, C. Q. Jin, R. C. Yu, “HRTEM and EELS Studies on Structural Defects in the Superconductor Sr 2 CuO 2+delt aCl 2-y Newly Synthesized under high pressure” Journal of Superconductivity and Novel Magnetism 19 ,129 (2006).

20. Q. Q. Liu , X. M. Qin, Y Yu, F.Y. Li, C. Dong, C. Q. Jin “High pressure synthesis of a new superconductor Sr 2 CuO 2+delt aCl 2-y induced by "apical oxygen doping”, Physica C 420 (1-2), 23 (2005).

21. Q. Q. Liu , C. Q. Jin, Y. Yu, F. Y. Li, Z. X. Liu, R. C. Yu, “High pressure synthesis and superconductivity of Sr 2 CuO 2+ δ Cl 2-y by apical oxygen doping”, Inter. J. Mod. Phy. B (19), 331 (2005).

22. H. Yang, Q. Q. Liu , R. C Yu, F. Y .Li, C. Q. Jin, “New superconducting phase of Sr 2 CuO 2+delta Cl 2-y with 0201-type structure synthesized under high pressure”, Superconductor Science &Technology 18 (6), 813 (2005).

23. H. Yang, Q. Q. Liu , F. Y. Li, C. Q. Jin, R. C. Yu, “An ordered oxygen deficiency

formed by electron irradiation of Cl-0201-type Sr 2 CuO 2+delta Cl 2-y superconductor” Superconductor Science &Technology 18 (10), 1360 (2005).

24. X. M Qin., Q. Q Liu , Y. Yu, L. X. Yang, J. Liu, C. Q. Jin, “The high-pressure synthesis and in situ property of the infinite-layer CaCuO 2 ”， Physica C 426, 510 (2005).

25. X. M Qin., Q. Q Liu , Y. Yu, F. Y. Li, R. C. Yu, J. Liu, C. Q. Jin, “Structural and electrical properties of infinite-layer CaCuO 2 under high pressure”, Science and Technology of Advanced Materials 6 (7), 828 (2005).