Upper bound to the charge-transfer energy on a 2D Wigner lattice in high-Tc cuprates

1997 ◽  
Vol 240 (4) ◽  
pp. 322-329 ◽  
Author(s):  
S. Kuwata
Keyword(s):  
Charge Transfer ◽  
Upper Bound ◽  
Transfer Energy ◽  
High Tc ◽  
Charge Transfer Energy ◽  
Wigner Lattice ◽  
High Tc Cuprates

scholarly journals Character of Doped Holes in Nd1−xSrxNiO2

2021 ◽  
Vol 6 (3) ◽  
pp. 33
Author(s):  
Tharathep Plienbumrung ◽  
Michael Thobias Schmid ◽  
Maria Daghofer ◽  
Andrzej M. Oleś
Keyword(s):  
Rare Earth ◽  
Charge Transfer ◽  
Charge Distribution ◽  
Hole Doping ◽  
Band Model ◽  
High Tc Superconductors ◽  
Transfer Energy ◽  
High Tc ◽  
Charge Transfer Energy ◽  
Two Band Model

We investigate charge distribution in the recently discovered high-Tc superconductors, layered nickelates. With increasing value of charge-transfer energy, we observe the expected crossover from the cuprate to the local triplet regime upon hole doping. We find that the d−p Coulomb interaction Udp makes Zhang-Rice singlets less favorable, while the amplitude of local triplets at Ni ions is enhanced. By investigating the effective two-band model with orbitals of x2−y2 and s symmetries we show that antiferromagnetic interactions dominate for electron doping. The screened interactions for the s band suggest the importance of rare-earth atoms in superconducting nickelates.

F−-Eu3+ charge transfer energy and local crystal environment in Eu3+ doped calcium fluoride

2017 ◽  
Vol 43 (16) ◽  
pp. 13089-13093 ◽  
Author(s):  
Yu Pan ◽  
Wenjun Wang ◽  
Liqun Zhou ◽  
Haibing Xu ◽  
Qinghua Xia ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Calcium Fluoride ◽  
Transfer Energy ◽  
Charge Transfer Energy

Origin of the Band Gap in the Negative Charge-Transfer-Energy Compound NaCuO2

1993 ◽  
Vol 70 (10) ◽  
pp. 1565-1565 ◽  
Author(s):  
T. Mizokawa ◽  
H. Namatame ◽  
A. Fujimori ◽  
K. Akeyama ◽  
H. Kondoh ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Band Gap ◽  
Negative Charge ◽  
Transfer Energy ◽  
Charge Transfer Energy

Closure of the charge-transfer energy gap and metallization ofNiI2under pressure

1993 ◽  
Vol 71 (24) ◽  
pp. 4011-4014 ◽  
Author(s):  
Anthony L. Chen ◽  
Peter Y. Yu ◽  
R. Dean Taylor
Keyword(s):  
Charge Transfer ◽  
Energy Gap ◽  
Transfer Energy ◽  
Charge Transfer Energy
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