Pressure-induced phase transitions in single-crystalline Cu ₄Bi₄S₉ nanoribbons

In situ angle dispersive synchrotron X-ray diffraction and Raman scattering measurements under pressure are employed to study the structural evolution of Cu₄Bi₄S₉ nanoribbons, which are fabricated by using a facile solvothermal method. Both experiments show that a structural phase transition occurs near 14.5 GPa, and there is a pressure-induced reversible amorphization at about 25.6 GPa. The electrical transport property of a single Cu₄Bi₄S₉ nanoribbon under different pressures is also investigated.