Probing the Order Parameter and the c-Axis Coupling of High- Tc Cuprates by Penetration Depth Measurements
C. Panagopoulos, J. R. Cooper, T. Xiang, G. B. Peacock, I. Gameson, P. P. Edwards
DOI 10.1103/PhysRevLett.79.2320 · Physical Review Letters
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Abstract
We have measured the low-temperature (T) dependence of the anisotropic penetration depth λ(T) of magnetically aligned powders of HgBa2Can−1CunO2n+2+δ ( n=1 and 3) down to 1.2 K. For both members the T dependence of the in-plane penetration depth λab(T) is strongly linear, whereas the out-of-plane component λc(T), for n=1 and 3, varies as T5 and T2, respectively. For comparison, we also report λc(T) data for grain-aligned YBa2Cu3O7−δ ( δ=0.0 and 0.43) which vary as T and T2, respectively. The results are discussed in terms of dx2−y2−wave symmetry of the order parameter in cuprates.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| HgBa2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | onset |
| HgBa2Ca2Cu3O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 134.5 | Pressure not reported | onset |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | unknown |
| YBa2Cu3O6.57 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 55 | Pressure not reported | unknown |
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