Ca content

d(CuO₂-CuO₂) Å

Tunneling probability × 10⁻¹¹

0.025

2.9076

4.6314

0.05

2.9034

4.7929

0.075

2.8874

5.4635

0.1

2.869

6.3514

0.125

2.8526

7.2637

0.15

2.83682

8.265

0.175

2.826

9.0303

0.2

2.818

9.6413