RT Journal Article
T1 Electronic Degeneracy and Intrinsic Magnetic Properties of Epitaxial Nb :  SrTiO3 Thin Films Controlled by Defects
A1 Sarantopoulos, Alexandros
A1 Ferreiro Vila, Elías
A1 Pardo, Victor
A1 Magén, Cesar
A1 Aguirre, Myriam Haydee
A1 Rivadulla Fernández, José Francisco
AB We 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 wells
PB APS Physics
SN 0031-9007
YR 2015
FD 2015
LK http://hdl.handle.net/10347/17031
UL http://hdl.handle.net/10347/17031
LA eng
NO Sarantopoulos, 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.115.166801
NO This work was supported by the European Research Council ERC StG-259082 2DTHERMS, MINECO of Spain MAT2013–44673-R, and Xunta de Galicia Projects No. 2012-CP071 and No. EM2013/037. V. P. acknowledges support from MINECO through the Ramón y Cajal Program. A. S. and E. F.-V. contributed equally to this work
DS Minerva
RD 24 abr 2026