Thermoelectric efficiency enhanced in a quantum dot with polarization leads, spin-flip and external magnetic fieldHui Yao, Peng-Bin Niu, Chao Zhang, Wei-Ping Xu, Zhi-Jian Li and Yi-Hang NieEur. Phys. J. B, 91 3 (2018) 57DOI: https://doi.org/10.1140/epjb/e2018-80552-8