نتایج جستجو برای: polaronic and bipolaronic forms

تعداد نتایج: 16844827  

Journal: :Physical review letters 2015
L L Lev J Krempaský U Staub V A Rogalev T Schmitt M Shi P Blaha A S Mishchenko A A Veligzhanin Y V Zubavichus M B Tsetlin H Volfová J Braun J Minár V N Strocov

Electronic structure of the three-dimensional colossal magnetoresistive perovskite La(1-x)Sr(x)MnO3 has been established using soft-x-ray angle-resolved photoemission spectroscopy with its intrinsically sharp definition of three-dimensional electron momentum. The experimental results show much weaker polaronic coupling compared to the bilayer manganites and are consistent with the theoretical b...

Journal: :Journal of the American Chemical Society 2008
Annemarie Huijser Tom J Savenije Stefan C J Meskers Martien J W Vermeulen Laurens D A Siebbeles

The exciton diffusion length in a nematically organized meso-tetra(4-n-butylphenyl)porphyrin (TnBuPP) layer was found to exceed 40 nm at a temperature of 90 K and to be equal to 22 +/- 3 nm at 300 K. The exciton diffusion coefficient decreases from > or = 3.1 x 10(-6) m(2)/s at 90 K to (2.5 +/- 0.5) x 10(-7) m(2)/s at 300 K. This thermal deactivation is attributed to exciton motion via a band m...

Journal: :Low Temperature Physics 2009

Journal: :International Journal of Superconductivity 2013

Journal: :Materials advances 2022

We show that the spin reorientation transitions in Nd 2 CuO 4 are associated with polaronic states and depend on electronic interactions between bulk surface.

2012
Shyue Ping Ong Yifei Mo Gerbrand Ceder

We present computational evidence of polaronic hole trapping and migration in lithium peroxide (Li2O2), a material of interest in lithium-air batteries. We find that the hole forms in the π∗ antibonding molecular orbitals of the peroxide (O2− 2 ) anion, and that this trapped hole induces significant local lattice distortion, forming a polaron. Our study finds migration barriers for the free pol...

Journal: :Physical Review Letters 2009

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Electrical conduction anomaly was observed in the mixed ion-polaron regime for xAg2O-40TeO2-(60-x)V2O5 glassy system with 0 ≤x≤ 50 mol%, which were prepared by common melt quenching method. For the understudied glasses, the temperature dependence of dc electrical conductivity was measured from a characteristic temperature to 380 K, which certified their semiconducting nature. The measured condu...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی دکتر علی شریعتی 1387

the study reflected in this thesis aims at finding out relationships between critical thinking (ct), and the reading sections of tofel and ielts tests. the study tries to find any relationships between the ct ability of students and their performance on reading tests of tofel and academic ielts. however, no research has ever been conducted to investigate the relationship between ct and the read...

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