The DX centre
T.N. Morgan
Semiconductor Science and Technology
Based on macroscopic quantum coherence effects arising from pair tunneling and flux quantization, a series of tricrystal experiments have been designed and carried out to test the order parameter symmetry in high-T c cuprate superconductors. By using a scanning SQUID microscope, we have directly and non-invasively observed the spontaneously generated half-integer flux quantum effect in controlled-orientation tricrystal cuprate superconducting systems. The presence or absence of the half-integer flux quantum effect as a function of the tricrystal geometry allows us to prove that the order parameter symmetry in the YBCO and T12201 systems is consistent with that of the dx2-y2pair state.
T.N. Morgan
Semiconductor Science and Technology
Joy Y. Cheng, Daniel P. Sanders, et al.
SPIE Advanced Lithography 2008
R.W. Gammon, E. Courtens, et al.
Physical Review B
Arvind Kumar, Jeffrey J. Welser, et al.
MRS Spring 2000