Pairing Symmetry in Single-Layer Tetragonal Tl 2 Ba 2 CuO β+δ Superconductors
- 19 January 1996
- journal article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 271 (5247) , 329-332
- https://doi.org/10.1126/science.271.5247.329
Abstract
A high-resolution scanning superconducting quantum interference device microscopy study of tetragonal single-layer Tl2Ba2CuOβ+δ films, deposited on tricrystal SrTiO3 substrates, demonstrates the effect of spontaneously generated half flux quanta. This observation shows that in addition to YBa2Cu3O7, the order parameter symmetry in Tl2Ba2CuOβ+δ is consistent with that of a dx2-y2 pair state. This result also rules out any bilayer or twinning effects and any pairing that is incompatible with the fourfold rotational symmetry as in the Tl2Ba2CuOβ+δ superconducting system.Keywords
This publication has 17 references indexed in Scilit:
- Coupling between Planes and Chains in Y: A Possible Solution for the Order Parameter ControversyPhysical Review Letters, 1995
- Experimental Proof of a Time-Reversal-Invariant Order Parameter with a shift inPhysical Review Letters, 1995
- Superconducting order parameter in bilayer cuprates: Occurrence of π phase shifts in corner junctionsPhysical Review B, 1995
- Use of Tricrystal Junctions to Probe the Pairing State Symmetry of YBCOPhysical Review Letters, 1995
- Sign reversal of the order parameter in s wave superconductorsPhysica C: Superconductivity and its Applications, 1995
- Evidence for an unconventional superconducting order parameter inPhysical Review B, 1994
- Pairing Symmetry and Flux Quantization in a Tricrystal Superconducting Ring ofPhysical Review Letters, 1994
- Time-reversal symmetry breaking in superconductors: A proposed experimental testPhysical Review B, 1994
- Experimental determination of the superconducting pairing state in YBCO from the phase coherence of YBCO-Pb dc SQUIDsPhysical Review Letters, 1993
- Vortices with half magnetic flux quanta in ‘‘heavy-fermion’’ superconductorsPhysical Review B, 1987