Our research focuses on superconductivity in high temperature superconducting cuprates. In particular, we are interested in the physics of thermal and quantum phase fluctuations, the superconductor-to-insulator transition, Abrikosov vortices, and the symmetry of the superconducting order parameter. The group makes and studies films and crystals of high-temperature superconductors. Films are made by codeposition with postannealing, sputtering, and pulsed laser deposition. Important measurements include resistivity and magnetic penetration depth as functions of temperature and magnetic field.
Left to Right: Jie Yong, John Draskovic, Tom Lemberger(PI), Mike Hinton and Stanley Steers
Superconductor-to-metal quantum phase transition in overdoped La2-xSrxCuO4, T. R. Lemberger, I. Hetel, A. Tsukada, M. Naito, and M. Randeria, Phys. Rev. B 83, 140507(R) (2011).
Superfluid density measurements of Ba(CoxFe1-x)2As2 films near optimal doping, Jie Yong, S. Lee, J. Jiang, C. W. Bark, J. D. Weiss, E. E. Hellstrom, D. C. Larbalestier, C. B. Eom, and T. R. Lemberger, Phys. Rev. B 83, 104510 (2011).
Anomalously sharp superconducting transitions in overdoped La2-xSrxCuO4 films. T. R. Lemberger, I. Hetel, A. Tsukada and M. Naito, Phys. Rev. B 82, 214513 (2010).