]>Local Electron-Lattice Interactions in High-Temperature Cuprate Superconductors : Figure 1
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Figure 1: Oxygen isotope ( 1 6 O / 1 8 O ) effect (OIE) exponent α O versus 𝑡 𝑐 = 𝑇 𝑐 / 𝑇 𝑚 𝑐 for various families of cuprate HTSs ( 𝑇 𝑚 𝑐 denotes the maximum 𝑇 𝑐 for a particular family). Red circles: Y 1 − 𝑥 P r 𝑥 B a 2 C u 3 O 7 − 𝛿 ; blue triangles: Y B a 2 − 𝑥 L a 𝑥 C u 3 O 7 ; green squares: L a 1 . 8 5 S r 0 . 1 5 C u 1 − 𝑥 N i 𝑥 O 4 . The references to the experimental data are given in [16]. The black dashed line is a guide to the eye. The black stars and solid line refer to the calculated 𝛼 𝑂 when only the nearest neighbour hopping integral 𝑡 1 is renormalized, whereas the purple stars and solid line refer to the renormalization of 𝑡 2 , 𝑡 4 [43–46].