China-born MIT professor Gang Chen, whose name was cleared earlier this year following a high-profile investigation into his alleged China ties, has led a team to discover what they say is the best semiconductor ever found. In a paper published in the journal Science last month, Chen and colleagues said that a material known as cubic boron arsenide could conduct heat 10 times better than silicon, the most widely used semiconductor . The new material’s extraordinary thermal conductivity makes it a promising candidate for next-generation electronics, according to the paper by Chen and co-authors from MIT, the University of Houston…