sodium cobaltate
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2021 ◽  
Vol 37 ◽  
pp. 190-198
Author(s):  
Conrad Guhl ◽  
Jochen Rohrer ◽  
Philipp Kehne ◽  
Thimo Ferber ◽  
Lambert Alff ◽  
...  


Adsorption ◽  
2019 ◽  
Vol 26 (5) ◽  
pp. 781-792
Author(s):  
Elizabeth Vera ◽  
Susana García ◽  
M. Mercedes Maroto-Valer ◽  
Heriberto Pfeiffer


Symmetry ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 633
Author(s):  
Dmitry M. Dzebisashvili ◽  
Andrey B. Klyuchantsev

Temperature dependence of the magnetic field penetration depth λ was calculated for water intercalated sodium cobaltate superconductor Na x CoO 2 · y H 2 O. Assuming that the system is in the chiral d+id–wave superconducting state, it was shown that the shifting of the excitation spectrum nodal points off the normal phase Fermi surface due to variation of the sodium content x changes the functional form of the temperature dependence of λ − 2 from exponential to linear in the low temperatures region. It is argued that this change in the functional form of T–dependence of the λ − 2 can serve as a proof for the chiral symmetry of the superconducting order parameter in the sodium cobaltate.





2019 ◽  
Vol 7 (3) ◽  
pp. 1800527 ◽  
Author(s):  
Elizabeth Vera ◽  
Yuhua Duan ◽  
Heriberto Pfeiffer


2018 ◽  
Vol 121 ◽  
pp. 145-150 ◽  
Author(s):  
I.F. Gilmutdinov ◽  
I.R. Mukhamedshin ◽  
F. Rullier-Albenque ◽  
H. Alloul


2018 ◽  
Vol 8 (1) ◽  
Author(s):  
T. J. Willis ◽  
D. G. Porter ◽  
D. J. Voneshen ◽  
S. Uthayakumar ◽  
F. Demmel ◽  
...  


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 213 (5) ◽  
pp. 1368-1368
Author(s):  
Christian Schneider ◽  
Patrick Schichtel ◽  
Boris Mogwitz ◽  
Rainer Straubinger ◽  
Andreas Beyer ◽  
...  


RSC Advances ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. 2162-2170 ◽  
Author(s):  
Elizabeth Vera ◽  
Brenda Alcántar-Vázquez ◽  
Yuhua Duan ◽  
Heriberto Pfeiffer

Sodium cobaltate works as a bifunctional material, in the catalysis of CO oxidation and subsequent CO2 chemisorption.



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