Anomalous magnetism of superconducting Mg-doped InN film

作者：Chang P H^*; Hong S Y; Lin W T; Guo Y X

来源：AIP Advances, 2016, 6(2): 025118.

DOI：10.1063/1.4942774

We report on the Meissner effect of Mg-doped InN film with superconducting transition onset temperature T-c,T- onset of 5 K. Mg-doped InN is magnetically ordered and exhibits a simultaneous first-order magnetic and electric transition near 50 K. Its behavior is similar to that of iron-based superconductors. A strong correlation is proposed to exist between structural distortion and superconductivity when Mg is doped into InN. The suppression of magnetic ordering close to T-c by doping is further demonstrated by anisotropic magnetoresistance and M-H measurements. The findings suggest that the superconducting mechanism in the system may not be conventional BCS.

• 出版日期2016-2