Transport mechanisms in La0.7Sr0.3FeO3: Evidence for small polaron formation

2001 ◽  
Vol 299 (1-2) ◽  
pp. 120-123 ◽  
Author(s):  
Woo-Hwan Jung
Keyword(s):  
Small Polaron ◽  
Transport Mechanisms ◽  
Polaron Formation

scholarly journals Surface electron dynamics in hematite (α-Fe2O3): correlation between ultrafast surface electron trapping and small polaron formation

2017 ◽  
Vol 8 (12) ◽  
pp. 8170-8178 ◽  
Author(s):  
Jakub Husek ◽  
Anthony Cirri ◽  
Somnath Biswas ◽  
L. Robert Baker
Keyword(s):  
Charge Carrier ◽  
Small Polaron ◽  
Functional Materials ◽  
Carrier Dynamics ◽  
Electron Trapping ◽  
Electron Dynamics ◽  
Surface Electron ◽  
X Ray ◽  
Charge Carrier Dynamics ◽  
Polaron Formation

Ultrafast soft X-ray reflection-absorption spectroscopy as a probe for following surface charge carrier dynamics in catalytically-relevant functional materials.

Infrared absorption spectra of molecular crystals: Possible evidence for small-polaron formation?

2008 ◽  
Vol 462 (4-6) ◽  
pp. 213-216 ◽  
Author(s):  
Željko Pržulj ◽  
Dalibor Čevizović ◽  
Slobodan Zeković ◽  
Zoran Ivić
Keyword(s):  
Absorption Spectra ◽  
Infrared Absorption ◽  
Small Polaron ◽  
Molecular Crystals ◽  
Polaron Formation ◽  
Infrared Absorption Spectra

Electron small polarons and their transport in bismuth vanadate: a first principles study

2015 ◽  
Vol 17 (1) ◽  
pp. 256-260 ◽  
Author(s):  
Kyoung E. Kweon ◽  
Gyeong S. Hwang ◽  
Jinhan Kim ◽  
Sungjin Kim ◽  
SeongMin Kim
Keyword(s):  
Concentration Dependence ◽  
Electron Mobility ◽  
First Principles ◽  
Density Functional Calculations ◽  
Density Functional ◽  
Small Polaron ◽  
Polaron Hopping ◽  
Polaron Formation ◽  
Hybrid Density Functional ◽  
Small Polarons

Hybrid density functional calculations demonstrate small polaron formation in electron-doped BiVO4, and predict the polaron hopping barrier to increase with lattice constant and also the possible concentration-dependence of electron mobility.

Low Temiperature Band Transport in Alpha-Hexathienylene Thinfilm-Transistors

1995 ◽  
Vol 413 ◽  
Author(s):  
L. Torsi ◽  
A. Dodabalapur ◽  
L. J. Rothberg ◽  
A. W. P. Fung ◽  
H. E. Katz
Keyword(s):  
Critical Temperature ◽  
Binding Energy ◽  
Field Effect ◽  
Transport Mechanism ◽  
Small Polaron ◽  
Transport Mechanisms ◽  
Field Effect Mobility ◽  
Overlap Integral ◽  
Thermally Activated ◽  
Small Polarons

ABSTRACTWe provide experimental evidence of a transition from thermally activated hopping of small polarons to band transport of delocalized polarons in polycrystalline oligothiophene fieldeffect transistors. We demonstrate that these transport mechanisms are intrinsic, i.e. governed by material-specific parameters such as the electronic overlap integral and the polaron binding energy. At high temperatures the field-effect mobility decreases with decreasing temperature and the transport mechanism is thermally activated hopping. Below a critical temperature Tτ, the field-effect mobility abruptly increases by more than two orders of magnitude and the transport becomes band-like. This behavior is consistent with the theory T. Holstein developed in 1959 for small polaron transport.

EFFECT OF LONG-RANGE DENSITY-DISPLACEMENT TYPE INTERACTION ON SMALL POLARON

2010 ◽  
Vol 24 (32) ◽  
pp. 6323-6333
Author(s):  
BAKHROM YAVIDOV
Keyword(s):  
Long Range ◽  
Small Polaron ◽  
Dimensional Chain ◽  
One Dimensional ◽  
Holstein Model ◽  
Neighboring Chain ◽  
Type Interaction ◽  
Polaron Formation ◽  
Exact Calculations ◽  
Range Density

In this work, renormalization of effective mass of an electron due to small polaron formation is studied within the framework of Extended Holstein model. It is assumed that electron moves along one-dimensional chain of ions and interacts with ions vibrations of neighboring chain via long-range density–displacement type force. By means of exact calculations, renormalized mass of nonadiabatic small polaron is obtained at strong coupling limit. Obtained results compared with those of small polaron mass of ordinary Holstein model. An effect of ions vibrations polarization on small polaron mass is addressed.

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