Department of Chemistry
Wed, May 16, 2012



Dr. Christopher Wiebe


Associate Professor

Department of Chemistry
The University of Winnipeg
515 Portage Avenue
Winnipeg, Manitoba
R3B 2E9
Canada

Phone: 204-786-9487
Email: ch.wiebe@uwinnipeg.ca
Web site: http://quantummaterials.weebly.com/


Education:

B. Sc. (University of Winnipeg, 1996)
M. Sc. (McMaster University, 1998)
Ph. D. (McMaster University, 2002)
NSERC Post-doctoral Fellow (Columbia University, 2002-2004)

Courses:

Introductory Chemistry, and Physical and Materials Chemistry courses at the second, third, and fourth year levels.

Research:

I am interested in the synthesis and characterization of new magnetic oxides. As a former faculty member of Florida State University, I am currently supervising several graduate students in my synthesis and crystal growth lab there. I am also in the process of establishing a solid state chemistry lab here at the University of Winnipeg.

I am primarily interested in what are called strongly correlated electron systems, or materials which have unusual magnetic or electrical behavior. These include functional materials, such as new solid state batteries, multiferroics, or superconductors, but they also include systems of theoretical interest, such as geometrically frustrated magnets, low dimensional compounds, and heavy fermion compounds. As an experimentalist, my main methods of characterization include diffraction techniques such as x-ray scattering and neutron scattering, but the bulk of my time is spent on the synthesis and crystal growth of these new materials here at the University of Winnipeg.

Selected Publications (Over 70 total):

(1) B. S. Conner, H. D. Zhou, L. Balicas, C. R. Wiebe, J. Whalen, and T. Siegrist (2011) Floating zone crystal growth and structural distortion of Pb2V3O9. Accepted for publication in the Journal of Crystal Growth.

(2) S. Ghosh, H. D. Zhou, L. Balicas, S. Hill, J. S. Gardner, Y. Qiu and C. R. Wiebe (2011) Short range ordering in the modified honeycomb lattice compound SrHo2O4. Accepted for publication in J. Phys. Cond. Matt.

(3) H. D. Zhou, Y. Barlas, C. R. Wiebe, Y. Qiu, J. R. D. Copley, J. R. D. Copley (2010) Inter- and intratrimer excitations in the multiferroic Ba3NbFe3Si2O14. Phys. Rev. B, 82, 132408.

(4) J. Rodriguez, A. A. Aczel, J. P. Carlo, S. R. Dunsiger, G. J. MacDougall, P. L. Russo, A. T. Savici, Y. J. Uemura, C. R. Wiebe, and G. M. Luke (2010) Study of the ground state properties of LiHoxY1-xF4 using muon spin relaxation. Phys. Rev. Lett., 105, 107203.

(5) H. D. Zhou, E. S. Choi, Y. J. Jo, L. Balicas, J. Lu, L. L. Lumata, R. R. Urbano, P. L Kuhns, A. P. Reyes, J. S. Brooks, R. Stillwell, C. R. Wiebe, J. Whalen, T. Siegrist (2010) Metamagnetic transition in single crystal Bi4Cu3V2O14. Phys. Rev. B, 82, 054435.

(6) K. Y. Choi, Z. Wang, P. Lemmens, H. D. Zhou, J. van Tol, N. S. Dalal, and C. R. Wiebe (2010) Inhomogeneous magnetic cluster states in the magnetoresistance material Lu2V2O7. Phys. Rev. B, 82, 054430.

(7) L. L. Lumata, T. Besara, P. L. Kuhns, A. P. Reyes, H. D. Zhou, C. R. Wiebe, L. Balicas, Y. J. Jo, J. S. Brooks, Y. Takano, M. J. Case, Y. Qiu, J. R. D. Copley, J. S. Gardner, K. Y. Choi, N. S. Dalal (2010) Low-temperature spin dynamics in the kgaome system Pr3Ga5SiO14. Phys. Rev. B, 81, 224416.

(8) H. D. Zhou, Y. J. Jo, J. Fiore Carpino, G. J. Munoz, C. R. Wiebe, J. G. Cheng, F. Rivadulla, D. T. Adroja (2010) Orbital fluctuations in the S=1/2 Mott insulator Sr2VO4. Phys. Rev. B, 81, 212401.

(9) T. Aharen, J. E. Greedan, C. A. Bridges, A. A. Aczel, J. Rodriguez, G. MacDougall, G. M. Luke, T. Imai, V. K. Michaelis, S. Kroeker, H. D. Zhou, C. R. Wiebe, L. M. D. Cranswick (2010) Magnetic properties of the geometrically frustrated S=1/2 magnets, La2LiMoO6 and Ba2YMoO6, with the B-site ordered double perovskite structure: Evidence for a collective spin singlet ground state. Phys. Rev. B, 81, 224409.

(10) B. S. Conner, H. D. Zhou, Y. J. Jo, L. Balicas, C. R. Wiebe, J. P. Carlo, Y. J. Uemura, A. A. Aczel, T. J. Williams, and G. M. Luke (2010) Possible Bose-Einstein condensate of magnons in single-crystalline Pb2V3O9. Phys. Rev. B, 81, 132401.

(11) S. Nellutla, M. Pati, Y-J. Jo, H. D. Zhou, B. H. Moon, D. M. Pajerowski, Y. Yoshida, J. A. Janik, L. Balicas, Y. Lee, M. W. Meisel, Y. Takano, C. R. Wiebe, and N. S. Dalal (2010) Magnetic field induced quantum phase transition of the S=1/2 antiferromagnet K2NaCrO8. Phys. Rev. B, 81, 064431.

(12) T. Aharen, J. E. Greedan, C. A. Bridges, A. A. Aczel, J. Rodriguez, G. MacDougall, G. M. Luke, V. K. Michaelis, S. Kroeker, C. R. Wiebe, H. D. Zhou, L. M. D. Cranswick (2010) Structure and magnetic properties of the S=1 geometrically frustrated double perovskites La2LiReO6 and Ba2YReO6. Phys. Rev. B, 81, 064436.

(13) K. Kovnir, C. M. Thompson, H. D. Zhou, C. R. Wiebe, and M. Shatruk (2010) Tuning ferro- and metamagnetic transitions in rare-earth cobalt phosphides La1- xPxCo2P2. Chemistry of Materials, 22, 1704-1713.

(14) J. B. Whalen, J. V. Zaikina, R. Achey, R. Stillwell, H. D. Zhou, C. R. Wiebe, and S. E. Latturner (2010) Metal to semimetal transition in CaMgSi crystals growtn from Mg-Al flux. Chemistry of Materials, 22, 1846-1853.

(15) H. D. Zhou, C. R. Wiebe, J. A. Janik, B. Vogt, A. Harter, N. S. Dalal, and J. S. Gardner (2010) Spin glass transition in the absence of chemical disorder for the pyrochlores A2Sb2O7 (A = Mn, Co, Ni). Journal of Solid State Chemistry, 183, 890- 894.