Sarantopoulos, AlexandrosFerreiro Vila, ElíasPardo, VictorMagén, CesarAguirre, Myriam HaydeeRivadulla Fernández, José Francisco2018-07-162018-07-162015Sarantopoulos, A., Ferreiro-Vila, E., Pardo, V., Magén, C., Aguirre, M., & Rivadulla, F. (2015). Electronic Degeneracy and Intrinsic Magnetic Properties of EpitaxialNb: SrTiO3Thin Films Controlled by Defects. Physical Review Letters, 115(16). doi: 10.1103/physrevlett.115.1668010031-9007http://hdl.handle.net/10347/17031We report thermoelectric power experiments in e-doped thin films of SrTiO3 (STO) which demonstrate that the electronic band degeneracy can be lifted through defect management during growth. We show that even small amounts of cationic vacancies, combined with epitaxial stress, produce a homogeneous tetragonal distortion of the films, resulting in a Kondo-like resistance upturn at low temperature, large anisotropic magnetoresistance, and nonlinear Hall effect. Ab initio calculations confirm a different occupation of each band depending on the degree of tetragonal distortion. The phenomenology reported in this Letter for tetragonally distorted e-doped STO thin films, is similar to that observed in LaAlO3/STO interfaces and magnetic STO quantum wellseng© 2015 American Physical Societyjournal article10.1103/PhysRevLett.115.1668011079-7114open access