scholarly journals Low-energy excitations in strongly correlated materials: A theoretical and experimental study of the dynamic structure factor in V2O3

2012 ◽  
Vol 86 (20) ◽  
Author(s):  
Federico Iori ◽  
Fanny Rodolakis ◽  
Matteo Gatti ◽  
Lucia Reining ◽  
M. Upton ◽  
...  
2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Raphael Richter ◽  
Denitsa Shopova ◽  
Wenjie Xie ◽  
Anke Weidenkaff ◽  
Frank Lechermann

The sodium cobaltate system NaxCoO2 is a prominent representant of strongly correlated materials with promising thermoelectric response. In a combined theoretical and experimental study we show that, by doping the Co site of the compound at x=0.7 with iron, a further increase of the Seebeck coefficient is achieved. The Fe defects give rise to effective hole doping in the high-thermopower region of larger sodium content x. Originally filled hole pockets in the angular-resolved spectral function of the material shift to low energy when introducing Fe, leading to a multisheet interacting Fermi surface. Because of the higher sensitivity of correlated materials to doping, introducing adequate substitutional defects is thus a promising route to manipulate their thermopower.


2016 ◽  
Vol 49 (6) ◽  
pp. 2354-2364 ◽  
Author(s):  
Arantxa Arbe ◽  
José A. Pomposo ◽  
Isabel Asenjo-Sanz ◽  
Debsindhu Bhowmik ◽  
Oxana Ivanova ◽  
...  

1986 ◽  
Vol 34 (2) ◽  
pp. 1516-1522 ◽  
Author(s):  
J. J. Salacuse ◽  
W. Schommers ◽  
P. A. Egelstaff

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