Intrinsic and precipitate-induced quantum corrections to conductivity in La2/3Sr1/3MnO

Yongxin Gao

¹

,

Guixin Cao

²

,

Jincang Zhang

³

et al.

Room temperature self-assembled growth of vertically aligned columnar copper oxide nanocomposite thin films on unmatched substrates

“…Nanocomposite thin films have attracted much attention due to their peculiar and tailorable properties in a variety of applications, such as controlling the optical properties 1, 2 , reducing the dielectric loss 3–5 , tuning the magnetic and electrical transport properties 6–12 , enhancing the electrochemical activity 13, 14 , and increasing the hardness 15, 16 . The novel architecture, interfacial interplay, and interaction or coupling between the constituents, are thought to be responsible for these peculiar properties and new functionalities.…”

Evidence of weak localization in quantum interference effects observed in epitaxial La0.7Sr0.3MnO3 ultrathin films

“…While Kondo effect dominates in intrinsically disordered samples910. Recently, QIEs in manganites have been intensively investigated to interpret the low-temperature resistivity minima26911121314. Generally, QIEs lead to correction to the resistivity from two different sources5: (i) electron-electron (e-e) interaction and subsequent modification of the density of states at the Fermi energy; (ii) weak localization (WL) effect arising from the self-interference of the wave pockets as they are backscattered coherently by the impurities or other defects.…”

“…investigated the low-temperature transport properties of La 0.7 Sr 0.3 MnO 3 (LSMO) films as a function of the sample thickness, and interpreted their results as an interplay of e-e interaction and WL effect. Gao et al 12. studied the resistivity minimum of LSMO films integrated with nonmagnetic ZrO 2 particles as a second phase to tune the contribution of an enhanced three dimensional WL effect.…”

“…However, to date the evidence of WL effect has still remained insufficient in manganites. Although vast phenomenological analyses have been fitted to prove the existence of the WL effect21112, the typical WL effect in magnetoresistance (MR) measurements, i.e., the sharp cusps around zero magnetic field at low temperatures, has not been observed. Thus, the conclusion that low-temperature resistivity minima are attributed to QIEs with the combination of e-e interaction and WL effect requires the further direct experimental evidence.…”

Materials News: Interfacial chemistry and atomic arrangement of ZrO2 − La2/3Sr1/3MnO3 pillar-matrix structures

“…%) of ZrO 2 precipitates an unusual low temperature resistivity increase associated with quantum interference effects of the electron waves was observed in conjunction with anomalous magnetic anisotropies. [7][8][9] Evidently, electronic transport of LSMO is sensitively influenced by the presence of ZrO 2 precipitates. Whereas up to now, only macroscopic properties of ZrO 2 -LSMO pillar-matrix systems (charge transport and magnetism) have been studied, microscopic properties at the atomic level were not investigated at all.…”