Doping dependence of local magnetic moments and antiferromagnetism in high-Tc superconductors: Asymmetry between electron and hole doping

1993 ◽  
Vol 86 (2) ◽  
pp. 119-122 ◽  
Author(s):  
J. Schmalian ◽  
G. Baumgärtel ◽  
K.-H. Bennemann
Keyword(s):  
Magnetic Moments ◽  
Hole Doping ◽  
High Tc Superconductors ◽  
High Tc ◽  
Doping Dependence

scholarly journals Theory for the doping dependence of spin fluctuation induced shadow states in high-Tc superconductors

1996 ◽  
Vol 212 (5) ◽  
pp. 270-274 ◽  
Author(s):  
M. Langer ◽  
J. Schmalian ◽  
S. Grabowski ◽  
K.H. Bennemann
Keyword(s):  
Spin Fluctuation ◽  
High Tc Superconductors ◽  
High Tc ◽  
Doping Dependence

Pairing Interaction in the Hole-Doped High-Tc Superconductors

1998 ◽  
Vol 12 (29n31) ◽  
pp. 2954-2957
Author(s):  
Sung-Ho Suck Salk
Keyword(s):  
Phase Diagram ◽  
Scattering Theory ◽  
Hole Doping ◽  
High Tc Superconductors ◽  
Pairing Interaction ◽  
High Tc ◽  
Positively Charged ◽  
Singlet Pair

A scenario for the possibility of hole-pairing is introduced on the basis of the phase diagram involving the spingap phase and the superconducting order for high-T c superconductors. Using our earlier generalized scattering theory, a theory of hole-pairing is proposed by allowing interaction between the negatively charged singlet pair and the positively charged holes as a result of hole doping.

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.

THEORY FOR INELASTIC NEUTRON SCATTERING IN HIGH-Tc SUPERCONDUCTORS: DOPING AND TEMPERATURE DEPENDENCE OF TWO CHARACTERISTIC FREQUENCIES

2000 ◽  
Vol 14 (29n31) ◽  
pp. 3451-3456
Author(s):  
I. EREMIN ◽  
D. MANSKE ◽  
C. JOAS ◽  
K. H. BENNEMANN
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Resonance Peak ◽  
Spin Fluctuations ◽  
High Tc Superconductors ◽  
High Tc ◽  
Doping Dependence ◽  
Antiferromagnetic Spin ◽  
Coherence Effect

Assuming the exchange of antiferromagnetic spin fluctuations as the Cooper pairing mechanism we calculate the doping dependence of the resonance peak seen in inelastic neutron scattering and the magnetic coherence effect. We find that the resonance peak in the magnetic susceptibility, Im χ(q,ω), appears only in the superconducting state at ωres and that it scales with Tc. Magnetic coherence is a result of an interplay between a d-wave order parameter and the kinematic gap ω0. We analyze the structure of Im χ below Tc, the doping dependence of ω0 and ωres, and the consequences for the optical conductivity.

scholarly journals Doping dependence of the chemical potential in cuprate high-Tc superconductors II. (Bi, Pb)2Sr2Ca2Cu3O10+δ

1995 ◽  
Vol 241 (3-4) ◽  
pp. 273-278 ◽  
Author(s):  
G. Rietveld ◽  
S.J. Collocott ◽  
R. Driver ◽  
D. van der Marel
Keyword(s):  
Chemical Potential ◽  
High Tc Superconductors ◽  
High Tc ◽  
Doping Dependence

Doping Dependence of Bose Condensation Energy in High Tc Cuprates

2003 ◽  
Vol 17 (18n20) ◽  
pp. 3231-3235
Author(s):  
Sung-Sik Lee ◽  
Sung-Ho Suck Salk
Keyword(s):  
Degrees Of Freedom ◽  
Doping Concentration ◽  
Bose Condensation ◽  
Hole Doping ◽  
Condensation Energy ◽  
Spin Gap ◽  
High Tc ◽  
Doping Dependence ◽  
Boson Theory ◽  
High Tc Cuprates

The doping dependence of the bose condensation energy is investigated by using our SU (2) holon-pair boson theory. It is shown that the bose condensation energy U results from the interplay between the charge and spin degrees of freedom and that the doping dependence of U at T=0K is well fit by the relation, [Formula: see text] with Δ0, the spin gap at 0K; x, the hole doping concentration and α, a constant.

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