Our experiments, which imaged the half-flux quantum effect in a tricrystal
geometry, showed that the gap has predominantly d-wave symmetry in
a number of the cuprate high-Tc superconductors over a broad
range in doping and temperature.
"Pairing Symmetry and Flux
Quantization in a Tricrystal Superconducting Ring of YBa2Cu3O7-d",
C.C. Tsuei, J.R. Kirtley, C.C. Chi, Lock See Yu-Jahnes, A. Gupta,
T. Shaw, J.Z. Sun, and M.B. Ketchen,
Phys. Rev. Lett. 73,593(1994).
"Symmetry of the order parameter in the high-Tc superconductor
YBa2Cu3O7 -d",
J.R. Kirtley, C.C. Tsuei, J.Z. Sun, C.C. Chi, Lock See Yu-Jahnes, A. Gupta, M. Rupp, and M.B. Ketchen,
Nature 373,225(1995).
"Half-integer flux quantum effect in tricrystal Bi2Sr2CaCu2O8+d",
J.R. Kirtley, C.C. Tsuei, H. Raffy,
Z.Z. Li, A. Gupta, J.Z. Sun, and S. Megert,
Europhys. Lett. 36,707(1996).
"Generation of Magnetic Flux by Single Grain Boundaries of
Y Ba 2Cu3O7-x",
J. Mannhart, H. Hilgenkamp, B. Mayer, Ch. Gerber,
J.R. Kirtley, K.A. Moler,
and M. Sigrist,
Phys. Rev. Lett. 77
,2782(1996).
"Pairing symmetry in Single-Layer Tetragonal
Tl 2Ba2CuO6+d
Superconductors",
C.C. Tsuei, J.R. Kirtley, M. Rupp, J.Z. Sun,
A. Gupta, and M.B. Ketchen,
Science,
272,329(1996).
"Probing High-Temperature
Superconductivity",
J.R. Kirtley and C.C. Tsuei,
Scientific American, August 1996, pages 68-73.
"Direct imaging of integer
and half-integer Josephson vortices in high-Tc grain boundaries",
J.R. Kirtley, C.C. Tsuei, Martin Rupp, J.Z. Sun,
Lock See Yu-Jahnes, A.
Gupta, M.B. Ketchen, K.A. Moler, and M. Bhushan,
Physical Review Letters 76,1336(1996).
"Pure
dx2-y2 order parameter symmetry in the
tetragonal
superconductor Tl 2Ba2CuO6+d"
C.C. Tsuei, J.R. Kirtley, Z.F. Ren, J.H. Wang, H. Raffy, and Z.Z.
Li.,
,
Nature 387, 481 (1997).
"Temperature dependence of the Half-Integer Magnetic
Flux Quantum",
J.R. Kirtley, C.C. Tsuei, and K.A. Moler,
Science 285,1373(1999).
"Pairing symmetry in cuprate
superconductors",
C.C. Tsuei and J.R. Kirtley,
Reviews of Modern Physics 72, 969-1016 (2000).
"Robust dx2-y2 pairing symmetry in high-temperature superconductors",
C.C. Tsuei, J.R. Kirtley, G. Hammerl, J. Mannhart, H. Raffy, and Z.Z. Li,
Phys. Rev. Lett. 93, 187004 (2004).