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We present a new observation of photorefractive (PR) effects in bent-core nematic (BCN) liquid crystal (LC) materials,where two kinds of optical-induced gratings are demonstrated and compared in pure and surface-doped BCN systems.The experimental results showed that these two kinds of gratings exhibit distinctive different polarization-dependent and angular-dependent behaviors,respectively.Furthermore,we supplied the pure and surface-doped rodlike LC systems for comparison,which revealed that V shape molecular structure of BCN can produce charge carrier more efficiently than rodlike molecular structure does.Thus BCN materials can offer an exciting potential for optical information processing.