Photoexcited-carrier transport in barium strontium titanate/strontium titanate heterostructures

Yan, Hong; Wang, J. Y.; Zhang, Z. T.; Bi, Yuanguo; Chen, C. L.; Kusaka, Jin

doi:10.1063/1.4986615

Cited by 6 publications

(5 citation statements)

References 42 publications

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“…[24,25] As a powerful external perturbation, light also can modify the transport properties of complex oxides. [26][27][28][29][30][31][32][33][34] In fact, the sensitivity of LAO/STO to the light was discovered several years ago. [35] More recently, the investigation of transport properties of light-illuminated samples revealed its fundamental physics for potential applications, which has drawn a lot of attention.…”

Section: Introductionmentioning

confidence: 99%

Review of photoresponsive properties at SrTiO ₃ -based heterointerfaces

et al. 2018

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The two-dimensional electron gas at SrTiO 3 -based heterointerfaces has received a great deal of attention in recent years owing to their potential for the exploration of emergent physics and the next generation of electronics. One of the most fascinating aspects in this system is that the light, as a powerful external perturbation, can modify its transport properties. Recent studies have reported that SrTiO 3 -based heterointerfaces exhibit the persistent photoconductivity and can be tuned by the surface and interface engineering. These researches not only reveal the intrinsic physical mechanisms in the photoresponsive process, but also highlight the ability to be used as a tool for novel all-oxide optical devices. This review mainly contraposes the studies of photoresponse at SrTiO 3 -based heterointerfaces.

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Section: Introductionmentioning

confidence: 99%

Review of photoresponsive properties at SrTiO ₃ -based heterointerfaces

et al. 2018

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“…Several reports have been made on the changes in the transport properties and resistivity of oxide films on the STO substrate in the energy range of ∼3.3–6 eV. − Interestingly, this effect falls within region III of our study (Figure a,b) where the resonant excitonic effects are prominently observed. These reported observations support our claims on the effects of resonant excitons within this energy region such that the electron–hole pairs generated from the STO substrate propagate into the top thin film structure.…”

Section: Discussionmentioning

confidence: 74%

Modulation of Manganite Nanofilm Properties Mediated by Strong Influence of Strontium Titanate Excitons

Yin

Tang

Majidi

et al. 2017

ACS Appl. Mater. Interfaces

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Hole-doped perovskite manganites have attracted much attention because of their unique optical, electronic, and magnetic properties induced by the interplay between spin, charge, orbital, and lattice degrees of freedom. Here, a comprehensive investigation of the optical, electronic, and magnetic properties of LaSrMnO thin films on SrTiO (LSMO/STO) and other substrates is conducted using a combination of temperature-dependent transport, spectroscopic ellipsometry, X-ray absorption spectroscopy, and X-ray magnetic circular dichroism. A significant difference in the optical property of LSMO/STO that occurs even in thick (87.2 nm) LSMO/STO from that of LSMO on other substrates is discovered. Several excitonic features are observed in thin film nanostructure LSMO/STO at ∼4 eV, which could be attributed to the formation of anomalous charged excitonic complexes. On the basis of the spectral weight transfer analysis, anomalous excitonic effects from STO strengthen the electronic correlation in LSMO films. This results in the occurrence of optical spectral changes related to the intrinsic Mott-Hubbard properties in manganites. We find that while lattice strain from the substrate influences the optical properties of the LSMO thin films, the coexistence of strong electron-electron (e-e) and electron-hole (e-h) interactions which leads to the resonant excitonic effects from the substrate plays a much more significant role. Our result shows that the onset of anomalous excitonic dynamics in manganite oxides may potentially generate new approaches in manipulating exciton-based optoelectronic applications.

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“…[124] These results may be useful in developing potential applications of heterojunctions for optoelectronic detections. [125][126][127][128][129][130][131]…”

Section: Manganites/bfo Heterostructuresmentioning

confidence: 99%

Review of photoinduced effect in manganite films and their heterostructures

Zhao

Wei

et al. 2018

Chinese Phys. B

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Light-matter interaction plays an important role in the non-equilibrium physics, especially in strongly correlated electron systems with complex phases. Photoinduced effect can cause the variation in the physical properties and produce some emergent phases. As a classical archetype, manganites have received much attention due to their colossal magnetoresistance (CMR) effect and the strong interaction of charge, spin, orbital, and lattice degrees of freedom. In this paper, we give an overview of photoinduced effect in manganites and their heterostructures. In particular, some materials, including ZnO, Si, BiFeO 3 (BFO), titanate-based oxides, and 0.7Pb(Mg 1/3 Nb 2/3 )O 3 -0.3PbTiO 3 (PMN-PT) have been integrated with manganites. Heterostructures composed of these materials display some exciting and intriguing properties. We do hope that this review offers a guiding idea and more meaningful physical phenomena will be discovered in active areas of solid state physics and materials science.

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Photoexcited-carrier transport in barium strontium titanate/strontium titanate heterostructures

Cited by 6 publications

References 42 publications

Review of photoresponsive properties at SrTiO ₃ -based heterointerfaces

Review of photoresponsive properties at SrTiO ₃ -based heterointerfaces

Modulation of Manganite Nanofilm Properties Mediated by Strong Influence of Strontium Titanate Excitons

Review of photoinduced effect in manganite films and their heterostructures

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Photoexcited-carrier transport in barium strontium titanate/strontium titanate heterostructures

Cited by 6 publications

References 42 publications

Review of photoresponsive properties at SrTiO 3 -based heterointerfaces

Review of photoresponsive properties at SrTiO 3 -based heterointerfaces

Modulation of Manganite Nanofilm Properties Mediated by Strong Influence of Strontium Titanate Excitons

Review of photoinduced effect in manganite films and their heterostructures

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Review of photoresponsive properties at SrTiO ₃ -based heterointerfaces

Review of photoresponsive properties at SrTiO ₃ -based heterointerfaces