Two-dimensional electron gas at the interface of Ba0.8Sr0.2TiO3 ferroelectric and LaMnO3 antiferomagnet

Fabrication of High-Temperature Quasi-Two-Dimensional Superconductors at the Interface of a Ferroelectric Ba0.8Sr0.2TiO3Павлов1, Zagidullin2, Мухортов3 et al. 2019Phys. Rev. Lett.23250View full textAdd to dashboardCite

“…That confirms a quasi-two-dimensional nature of the superconductive state (see also Supplemental Material [21].) We did not perform the measurements in higher magnetic fields intentionally, since we know from the previous experience [26] that the effects of magnetostriction in relatively small magnetic fields can lead to partial peeling of the film from the substrate resulting in partial or complete disappearance of the observed effect. On the other hand, we believe that in our case, by analogy with LSCO, H c2 is of the order of 29-81 T, which is inaccessible for us.…”

“…On the other hand, we believe that in our case, by analogy with LSCO, H c2 is of the order of 29-81 T, which is inaccessible for us. The most common mechanism for q2DEG is the polarization catastrophe (PC) model [12,17], which was also discussed for the case of ferroelectric/dielectric interface [25][26][27][28][29]. The polar discontinuity at the interface leads to the divergence of the electrostatic potential.…”

“…The first is that q2DEG was created at the interface of the Ba 0.8 Sr 0.2 TiO 3 /LaMnO 3 heterostructure [26]. It would be unlikely that a change in the oxygen concentration in LaMnO 3 could lead to the appearance of q2DEG, because it was shown experimentally for this case that the occurrence of q2DEG is related to the direction of polarization in the ferroelectric, and arises only in the case of polarization directed perpendicular to the interface [26]. Our sample was obtained by the same technology using the same equipment.…”

Ab initio investigation of electronic and magnetic properties of antiferromagnetic/ferroelectric LaMnO3/BaTiO3 interface

“…Recently, we presented experimental investigations for Ba 0.8 Sr 0.2 TiO 3 /LaMnO 3 heterostructure [46]. In particular, four-probe measurements of the electrical resistance versus temperature indicate that the resistivity exhibits the activation-type of behavior within the whole temperature range for the sample in the configuration with the c-axis of LaMnO 3 single crystal directed parallel to the interface.…”

Passage of fractal signals via circuit with a ferroelectric capacitor with a negative capacitance

“…At present all over the world great attention is paid to the development of integrated ferroelectrics [1–3]. Having arisen at the end of the last century, this interdisciplinary scientific direction aims at the integration of ferroelectric materials with technologies of microelectronic manufacture.…”