Research Interests
Publications
Other Folks in HTSC Group:

W.N.Hardy
D.A.Bonn
UBC Superconductivity Homepage
CIFAR
Facilitator of the collaborations
Still hanging onto HiTc...

Ruixing Liang
 Materials Scientist, CIFAR Assoc.

  • M.Sc., D.Sc. in Materials Science, Tokyo Institute of Technology (86, 89)
  • Post-Doc, UBC (90-92)
  • Research Assoc., UBC (93-96)
  • NSERC Brockhouse Prize (2005)
  • Phone(Office): (604)822-4611
  • Phone(Lab): (604)822-1997
  • Fax: (604)822-4750 
  • E-mail: liang [at] physics.ubc.ca
  • Mailing Address:
Beautiful BC

 Vancouver

 Okanagan

Research Interests:

 YBCO crystals
Since coming to UBC in 1990 I have been developing a program of growth of state-of-the-art single crystals of high Tc superconducting cuprates, and playing a vital rule in an international research collaboration to solve the problem of high Tc superconductivity by supplying the best crystal samples which are essential for many experiments. In particular, I have developed BaZrO3 ceramics that meet the strict quality requirements for handling corrosive BaO-CuO melts. This has made UBC one of the two or three organizations that are able to produce such ceramics. The BaZrO3 ceramic crucibles have made it possible to grow YBa2Cu3 O7-x single crystals with more than one order of magnitude improvement in purity over the previous generation crystals. I have also carries out extensive studies on chemical and thermodynamic behaviors of YBCO. This made it possible to precisely control the oxygen stoichiometry and ordering in YBCO crystals. These state-of-the-art crystals have supported a broad research collaboration on high Tc superconductivity involving many researchers, both in and outside UBC.

The collaboration has been very successful and generated well over 100 publications, including 4 in Nature, 2 in Science and 32 in Phys. Rev. Lett.
Most recent result of collaboration published in Nature

In addition, I have carried out research on the behavior of high Tc superconductors in magnetic fields. In 1994 I generated the first reliable lower critical field data for YBCO through the unique use of ellipsoidal samples. In 2004 I carried out lower critical field measurements on YBCO with doping level near the boundary between the anti-ferromagnetic and superconducting phases, which provided important insights into the evolution of superconductivity. In 1995 I observed the magnetization jump at the vortex melting transition in YBCO, which was the first thermodynamic evidence for the first order nature of the transition. These results were published in Phys. Rev. Lett. and Phys. Rev. B.

Selected Publications:

Full Publication List
  1. Evaluation of CuO2 plane hole doping in YBa2Cu3O6+x Single Crystals
    Ruixing Liang, D.A. Bonn, and W.N. Hardy,
    Phys. Rev. B 73, 180505(R) (2006)
  2. Lower Critical Field and Superfluid Density of Highly Underdoped YBa2Cu3O6+x Single Crystals
    Ruixing Liang, D.A. Bonn, W.N. Hardy, and David Broun,
    Phys. Rev. Lett. 94, 117001 (2005).
  3. Preparation and Characterization of Homogeneous YBCO Single Crystals with Doping Level near the SC-AFM Boundary
    Ruixing Liang, D. A. Bonn, W. N. Hardy, Janice C. Wynn, K. A. Moler, L. Lu, S. Larochelle, L. Zhou, M. Greven, L. Lurio, S. G. J. Mochrie,
    Physica C 383, 1 (2002).
  4. Preparation and X-Ray Characterization of Highly Ordered Ortho-II Phase YBa2Cu3O6.50 Single Crystals.
    Ruixing Liang, D. A. Bonn, and Walter N. Hardy.
    Physica C 336, 57(2000).
  5. Growth of High Quality YBCO Crystals Using BaZrO3 Crucibles.
    Ruixing Liang, D.A. Bonn, and W.N. Hardy,
    Physica C. 304, 105 (1998).
  6. Discontinuity of reversible magnetization in untwinned YBCO singlecrystals at the first order vortex melting transition.
    Ruixing Liang, D. A. Bonn, and W. N. Hardy,
    Phys. Rev.Lett. 6, 835(1996)