| Popis: |
The Hall coefficient (RH) has been measured in 0.5% Zn‐doped La2−xSrxCu0.995Zn0.005O4 under high magnetic fields up to 12 T. With decreasing temperature, RH increases and begins to decrease below a temperature TRH. This characteristic temperature TRH has the local maximum around x = 0.195, and this Sr‐concentration coincides with that the superconducting transition temperature is slightly suppressed. This behavior is quite similar to the phenomena observed in the stripe phase in x ∼ 0.12. These results suggest that the anomalous decrease of RH around x = 0.195 observed in this study is responsible for the “1/4”‐anomaly [as reported by Kakinuma et al., Phys. Rev. B 59, 1491 (1999).]. |
