Suppression of photovoltaic effect by magnetic field in Pr 0.65(Ca0.75Sr0.25)0.35MnO 3/Nb:SrTiO3 heterostructure

Suppression of photovoltaic effect by magnetic field in Pr 0.65(Ca0.75Sr0.25)0.35MnO 3/Nb:SrTiO3 heterostructure

Suppression of photovoltaic effect by magnetic field in Pr 0.65(Ca0.75Sr0.25)0.35MnO 3/Nb:SrTiO3 heterostructure
C. Luo, K. X. Jin, C. L. Chen, T. Wu
Applied Physics Letters, Volume 103, Issue 21, Article number 212401, (2013)
C. Luo, K. X. Jin, C. L. Chen, T. Wu
Current-voltage relations, Electronic phase separation, Nb-doped SrTiO, P-n junction, Photo-voltage, Physical mechanism, Suppression effects
2013
The heterostructure composed of Pr0.65(Ca0.75Sr 0.25)0.35MnO3 and 0.7 wt. % Nb-doped SrTiO3 was fabricated. The heterostructure exhibits an asymmetric current-voltage relation similar to that of p-n junctions and an obvious photovoltaic effect with its maximum value of about 25.1 mV at T = 140 K. It is interesting that the magnetic field has a strong suppression effect on photovoltaic effect, and the maximum relative change of photovoltage under the magnetic field of 1 T is about 63% with the illumination of 15 mW/mm2 light (532 nm) at T ∼ 140 K. The physical mechanism is explained by the electronic phase separation mechanism.



10.1063/1.4832331
00036951