Abstract
| Original language | Undefined |
|---|---|
| Pages (from-to) | 190-194 |
| Number of pages | 5 |
| Journal | Nature physics |
| Volume | 2 |
| DOIs | |
| Publication status | Published - 2006 |
Keywords
- IR-74125
- METIS-233517
Cite this
}
Angle-resolved phase-sensitive determination of the in-plane gap symmetry in YBa2Cu3O7. / Kirtley, J.R.; Tsuei, C.C.; Ariando, A.; Verwijs, C.J.M.; Harkema, Sybolt; Hilgenkamp, Johannes W.M.
In: Nature physics, Vol. 2, 2006, p. 190-194.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Angle-resolved phase-sensitive determination of the in-plane gap symmetry in YBa2Cu3O7
AU - Kirtley, J.R.
AU - Tsuei, C.C.
AU - Ariando, A.
AU - Verwijs, C.J.M.
AU - Harkema, Sybolt
AU - Hilgenkamp, Johannes W.M.
PY - 2006
Y1 - 2006
N2 - Understanding the nature of the ground state and its low-lying excitations in the copper oxide superconductors is a prerequisite for determining the origin of high-temperature superconductivity. A superconducting order parameter (that is, the energy gap) with a predominantly dx2-y2 symmetry is well-established. However, various deviations from a pure d-wave pair state, such as the possibility of Cooper pairing with broken time-reversal symmetry or an admixed dx2-y2+s pair state, have been theoretically predicted and actively sought in numerous experimental studies. Here, we present an angle-resolved phase-sensitive technique for accurately determining the in-plane pairing symmetry, and demonstrate this technique in optimally doped YBa2Cu3O7-. We find that the gap along the b-axis (Cu–O chain) direction is at least 20% larger than that along the a-axis direction, and that any imaginary idxy, is or ip component must be smaller than a few per cent of the dx2-y2 component of the gap.
AB - Understanding the nature of the ground state and its low-lying excitations in the copper oxide superconductors is a prerequisite for determining the origin of high-temperature superconductivity. A superconducting order parameter (that is, the energy gap) with a predominantly dx2-y2 symmetry is well-established. However, various deviations from a pure d-wave pair state, such as the possibility of Cooper pairing with broken time-reversal symmetry or an admixed dx2-y2+s pair state, have been theoretically predicted and actively sought in numerous experimental studies. Here, we present an angle-resolved phase-sensitive technique for accurately determining the in-plane pairing symmetry, and demonstrate this technique in optimally doped YBa2Cu3O7-. We find that the gap along the b-axis (Cu–O chain) direction is at least 20% larger than that along the a-axis direction, and that any imaginary idxy, is or ip component must be smaller than a few per cent of the dx2-y2 component of the gap.
KW - IR-74125
KW - METIS-233517
U2 - 10.1038/nphys215
DO - 10.1038/nphys215
M3 - Article
VL - 2
SP - 190
EP - 194
JO - Nature physics
JF - Nature physics
SN - 1745-2473
ER -