Magnetic field dependence of charge stripe order in La2-xBaxCuO4 (x ≈ 1/8)

We have carried out a detailed investigation of the magnetic field dependence of charge ordering in La2-xBaxCuO4 (x approximate to 1/8) by utilizing high-resolution x-ray scattering. We find that the charge order correlation length increases as a magnetic field greater than similar to 5 T is applied in the superconducting phase (T=2 K). The observed unusual field dependence of the charge order correlation length suggests that the static charge stripe order competes with the superconducting ground state in this sample.