Professor John Tse Fellow, Royal Canadian Academy of Sciences Department of Physics and Engineering Physics, University of Saskatchewan Email:John.Tse@usask.ca Homepage:http://physics.usask.ca/~tsej/index.html

Position
2001-2004 Chief Research Officer, National Research Council

1997-2004 Theoretical and Computational Project Leader

1980-1981 Visiting Fellow, National Research Council

1981-1984 Assistant Research Officer, National Research Council

1984-1990 Associate Fellow, National Research Council

1990-2001 Senior Fellow, National Research Council

The Research Field
The computer model of solid phase transition is constructed, and the first principles of quantum computation and classical molecular dynamics are used Theoretical design of energy-saving materials Theoretical study of electronic structures of semiconductors and superconductors Development and application of synchrotron radiation high resolution technology

Publications
1. A.A. Leitch, K. Lekin, S.M. Winter, L.E. Downie, H. Tsuruda, J.S. Tse, M. Mito, S. Desgreniers, P.A. Dube, S. Zhang, Q. Liu, C.Q. Jin, Y. Ohishi, and R.T. Oakley, From Magnets to Metals: The Response of Tetragonal Bisdiselenazolyl Radicals to Pressure, J. Am. Chem. Soc., 133, 6051 2011

2. N.J. English and J.S. Tse, Density Fluctuations in Liquid Water, Phys. Rev. Lett., 106, 037801 2011

3. W.L. Lim, J.S. Tse and T. Iitaka, Pressure-induced structural changes and intermolecular interactions in crystalline silane-hydrogen, Phys. Rev. Lett., 105, 21550, 2010.

4. K. Lekin, S. Winter, L. Downie, X. Bao, J.S. Tse, S. Desgreniers, R. Secco, P. Dube and R. Oakley, Hysteretic Spin Crossover between a Bisdithiazolyl Radical and its Hypervalent Dimer, J. Amer. Chem. Soc.,132,16212, 2010.

5. J.S. Tse, A. Leitch, X. Yu, X. Xuezhao, S. Zhang, Q.Q. Liu, C. Jin, R. Secco, S. Desgreniers, Y. Ohishi and R. Oakley, Metallization of a hypervalent radical djiaoimer: Molecular and band perspectives, J. Amer. Chem. Soc., 132, 4876-4886, 2010.

6. M. Mito, Y. Komorida, H. Tsuruda, J.S. Tse, S. Desgreniers, Y. Ohishi, A.A. Leitch, K. Cvrkalj, C.M. Robertson, and Richard T. Oakley, Heavy Atom Ferromagnets under Pressure: Structural Changes and the Magnetic Response, J. Amer. Chem. Soc., Comm., 131 16012, 2009.

7. N.J. English and J.S. Tse, Mechanisms for thermal conduction in methane hydrate, Phys. Rev. Lett., 103, 015901 2009

8. J.S. Tse, D.D. Klug, S. Desgreniers, J. Smith, R. Dutrisac, Instability of CaLi2 at High Pressure: Theoretical Prediction and Experimental Results, Europhys. Lett., 86, 56001, 2009

9. Y. Yao, J.S. Tse, J. Sun, D.D. Klug, R. Martonak and T. Iitaka, Comment on .New Metallic Carbon Crystal, Phys. Rev. Lett., 102, 229601, 2009

10. J.S. Tse, Boron charged under Pressure, Nature, 457, 800, 2009.

11. Y. Yao, J.S. Tse, and D.D. Klug, Structures of insulating phases of dense lithium, Phys. Rev. Lett., 102, 115503, 2009.

12. Y. Meng, P Eng, J.S. Tse, D.M. Shaw, M. Hu, J. Shu, S. Gramsch, C.C. Kao, R.J. Hemley, H-k. Mao, Inelastic x-ray scattering of dense solid oxygen: evidence for intermolecular bonding, Proc. Natl., Acad. Sci., 105, 11640 2008.

13. J.S. Tse, D.M. Shaw, D.D. Klug, S.Patchkovskii, G. Vanko, M. Krisch, X-ray Raman spectroscopic study of water in the condensed phases, Phys. Rev. Lett., 100, 095502 2008.

14. M. Eremets, I.A. Trojan, S.A. Medvedev, J.S. Tse and Y. Yao, Superconductivity in Hydrogen Dominant Materials: Silane, Science, 319, 1506 2008.

15. I. Goncharenko, M.I. Eremets, M. Hanfland, J.S. Tse , M. Amboage, Y. Yao and I.A.Trojan, Pressure-induced hydrogen-dominant metallic state in aluminum hydride, Phys. Rev. Lett., 100, 45504, 2008

16. J.J. Yang, J.S. Tse, Y. Yao and T. Iitaka, Structural and Electronic Properties of Pristine and Ba-doped Clathrate-like Carbon Fullerenes, Angewandte Chemie, 46, 6275, 2007.

17. Y. Yao, J.S. Tse, Y. Ma and K. Tanaka, Superconductivity in high-pressure SiH4, Europhys. Lett., 78, 37003, 2007

18. J.S. Tse, Y. Yao and K. Tanaka, Novel superconductivity in metallic SnH4 under high pressure, Phys. Rev. Lett., 98, 117004 2007

19. J.S. Tse, T. Iitaka and K. Parlinski, Vibrational Properties and Superconductivity in Ba24Si100, Europhys. Lett., 75, 153 2006.

20. V.V. Struzhkin, H-k Mao, J-F. Lin, R.J. Hemley, J.S. Tse, Y. Ma, M.Y. Hu, P. Chow, and C.C. Kao, Valence band x-ray emission spectra of compressed germanium, Phys. Rev. Lett. 96, 137402, 2006

21. J. S. Tse, D. D. Klug, J.Y. Zhao, W. Sturhahn, E.E. Alp, J. Baumert, C. Gutt, M.R. Johnson and W. Press, Anharmonic motions of Kr in the clathrate hydrate. Nature Materials, 4, 917, 2005Y.Q. Cai, H-k. Mao, P.C. Chow, J.S. Tse, Y. Ma, S. Patchkovskii, J.F. Shu, V. Struzhkin, R.J. Hemley, H. Ishii, C.C. Chen, C.T. Chen and C.C. Kao, Ordering of hydrogen bonds in high-pressure-low temperature H2O, Phys. Rev. Lett., 94, 25502 2005S.

22. S. Patchkovskii, J.S. Tse, S.N. Yurchenko, L. Zhechkov, T. Heine, G. Seifert, Graphene nanostructures as tunable storage media for molecular hydrogen, Proc. Natl. Acad. Sci., 102, 10439 2005M.

23. Guthrie, C.A. Tulk, C.J. Benmore, J. Xu, J.L. Yarger, D.D. Klug, J.S. Tse, H-k. Mao and R.J. Hemley, Formation and structure of a dense octahedral glass, Phys. Rev. Lett., 93, 115520, 2004.

24. S. Patchkovskii and J.S. Tse, Thermodynamic Stability of Hydrogen Clathrates, Proc. Nat. Acad. Sci., 100, 14645, 2003.

25. J. Haines, C. Chateau, J.M. Leger, C. Bogicevic, S. Hull, D.D. Klug and J.S. Tse, Phys. Rev. Lett., 91, 015503, 2003.

26. V. P. Shpakov, P. M. Rodger, J.S. Tse, D. D. Klug, and V. R. Belosludov , Thermodynamic discontinuity between low-density amorphous ice and supercooled water, Phys. Rev. Lett., 88 , 155502 2002.

27. J. Li, J. Jia, J. Xue, L. Xi, X. Liu, J. Wang, Q. Xue, Z.Q. Li, J.S. Tse, Z. Zhang, and S. B. Zhang, Spontaneous assembly of perfectly ordered identical-size nanocluster arrays, Phys. Rev Lett., 88, 066101 2002.

28. J.S. Loveday, R.J. Nelmes, M. Guthrie, S.A. D.D. Klug and J.S. Tse, Transition from Cage Clathrate to Filled Ice: The Structure of Methane Hydrate III., Phys. Rev. Lett., 87:215501, 2001

29. J.S. Loveday, R.J. Nelmes, M. Guthrie, S.A. Belmonte, D.R. Allan, D.D. Klug, J.S. Tse and Y.P. Handa, Existence of stable methane hydrate above 2 GPa and the implication for Titan, Nature, 410:661, 2001

30. Z.Q. Li and J.S. Tse, .Reply to comments on Phonon Anomaly in High Pressure Zn., Phys. Rev. Lett., 87:259602, 2001

31. Z.Q. Li and J.S. Tse, Phonon Anomaly in High Pressure Zn, Phys. Rev. Lett., 85:5130 2000.

32. J.S. Tse, D.D. Klug, C.A. Tulk, E.C. Svensson, I. Swainson, V.P. Shpakov and V.R. Belosludov, Origin of Low-Frequency Local Vibrational Modes in High Density Amorphous Ice, Phys. Rev. Lett., 85:3185, 2000.

33. J.S. Tse, K. Uehara, R. Rosseau, A. Ker, C.I. Ratcliffe, M.A. White and G. MacKay, Structural Principles and Amorphous-like Thermal Conductivity of Na-doped Si Clathrates, Phys. Rev. Lett., 85:114, 2000.

34. J.S. Tse, G. Frapper, A. Ker, R. Rousseau, and D. D. Klug. Phase stability and electronic structure of K-Ag intermetallics at high pressure. Phys.Rev.Lett. 82:4472, 1999.

35. J.S. Tse, D. D. Klug, C. A. Tulk, I. P. Swainson, E. C. Svensson, C-K. Loong, V. P. Shpakov, V. R. Belosludov, R. V. Belosludov, and Y. Kawazoe. The mechanisms for pressure-induced amorphization of ice lh. Nature 400:647, 1999.

36. J.S. Tse and D. D. Klug. The anomalous isostructural transformation in ice VIII. Phys.Rev.Lett. 81:2466, 1998.

37. D. W. Boo, Z. F. Liu, A. G. Suits, J.S. Tse, and Y. T. Lee. Dynamics of carbonium ions solvated by molecular hydrogen: CH 5+(H2)n (n=1,2,3). Science 269:57, 1995.

38. J.S. Tse and D. D. Klug. Evidence from molecular dynamics simulations for non-metallic behaviour of solid hydrogen at 160 GPa. Nature 378:595, 1995.

39. J.S. Tse, D. D. Klug, and K. Laasonen. Structural dynamics of protonated methane and acetylene. Phys.Rev.Lett. 74:876, 1995.

40. J.S. Tse, D. D. Klug, J. A. Ripmeester, S. Desgreniers, and K. Lagerec. The role of non-deformable units in pressure-induced reversible amorphization of clathracils. Nature 369:724, 1994.

41. J.S. Tse and D. D. Klug. Anisotropy in the structure of pressure-induced disordered solids. Phys.Rev.Lett. 70:174, 1993.

42. J.S. Tse, D. D. Klug, and Y. LePage. A novel high pressure form of silica. Phys.Rev.Lett. 69:3647, 1992.

43. J.S. Tse and D. D. Klug. Structural memory in pressure-amorphized AlPO₄. Science 255:1559, 1992.

44. Tse, J.S., Klug, D.D., Le Page, Y.,Novel high pressure phase of silica.  Phys.Rev.Lett.,69:3647,1992.

45. J.S. Tse and D. D. Klug. Mechanical instability of .-quartz: a molecular dynamics study. Phys.Rev.Lett. 67:3559, 1991.

46. D. W. Davidson, M. A. Desando, S. R. Gough, Y. P. Handa, C. I. Ratcliffe, J. A. Ripmeester, and J.S. Tse. A clathrate hydrate of carbon monoxide. Nature 328:418, 1987.

47. J. R. Morton, K. F. Preston, A. Sayari, and J.S. Tse. Reactions of a paramagnetic silver cluster with NH3 and C2H4. J.Phys.Chem. 91:2117, 1987.

48. J. A. Ripmeester, J.S. Tse, C. I. Ratcliffe, and B. M. Powell. A new clathrate hydrate structure. Nature 325:135, 1987.

49. J.S. Tse and M. L. Klein. Molecular dynamics dtudies on the pressure induced order . amorphous transitions in ice Ih. Phys.Rev.Lett. 58:1682, 1987.

50. D. W. Davidson, Y. P. Handa, C. I. Ratcliffe, J.S. Tse, and B. M. Powell. The ability of small molecules to form clathrate hydrates of structure II. Nature 311:142, 1984.

51. R. P. Gupta, J.S. Tse, and G. M. Bancroft. Core level ligand field splittings in the photoelectron spectra. Phil.Trans.Roy.Soc. 293A:535, 1980.

Awards
1.Outstanding Research Scholar Award Awarding Body: University of Saskatchewan, Canada Winner：John Tse

2.2001 Outstanding Achievement Award Awarding Body：Steacie Institute for Molecular Sciences, National Scientific Research Council, Canada Winner：John Tse