بررسی خواص الکترونیکی lacoo3

Observation of magnetic excitons in LaCoO3

– An impurity-driven magnetic phase transition has been investigated in LaCoO3 at temperatures below that of the thermally induced spin state transition of the Co ion. We have discovered a saturating component of the magnetisation, which we attribute to previously unobserved interactions between magnetic excitons. These conclusions are confirmed by muon spin spectroscopy which indicates an orde...

Field-induced exciton condensation in LaCoO3

Motivated by recent observation of magnetic field induced transition in LaCoO3 we study the effect of external field in systems close to instabilities towards spin-state ordering and exciton condensation. We show that, while in both cases the transition can be induced by an external field, temperature dependencies of the critical field have opposite slopes. Based on this result we argue that th...

Voltage-controlled ferromagnetism and magnetoresistance in LaCoO3/SrTiO3 heterostructures

Competing strain effects in reactivity of LaCoO3 with oxygen

Akihiro Kushima,1 Sidney Yip,1,2 and Bilge Yildiz1,* 1Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA 2Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA Received 16 April 2010; revised manuscript rec...

Ionic conductivity of perovskite LaCoO3 measured by oxygen permeation technique

تاثیر میدان مغناطیسی بر خواص الکترونیکی نقطه‌‌ی‌ کوانتومی سهموی

Using the path integral Monte Carlo method, in this paper, we have calculated energies of a parabolic quantum dot (PQD) under various conditions and the corresponding electron densities. We have studied the effects of parameters such as temperature, number of confined electrons in the PQD, and electron-electron interactions on the PQD’s ground state, from which we have described the forma...