Identification of two critical charge carrier doping values in high-temperatureY0.8Ca0.2Ba2Cu3OxandSm2−xCexCuO4−ycuprate superconductors

2010 ◽  
Vol 81 (17) ◽  
Author(s):  
B. J. Taylor ◽  
R. E. Baumbach ◽  
D. J. Scanderbeg ◽  
M. B. Maple
Keyword(s):  
Charge Carrier ◽  
Critical Charge ◽  
Carrier Doping

High-energy magnetic excitations in cuprate superconductors

2015 ◽  
Vol 29 (25n26) ◽  
pp. 1542001
Author(s):  
Lulin Kuang ◽  
Yu Lan ◽  
Huaisong Zhao ◽  
Shiping Feng
Keyword(s):  
Charge Carrier ◽  
Cuprate Superconductors ◽  
Parent Compound ◽  
High Energy ◽  
Magnetic Excitations ◽  
Self Energy ◽  
Spin Excitations ◽  
Dynamical Spin ◽  
Carrier Doping ◽  
Modest Effect

In this paper, the high-energy magnetic excitations in cuprate superconductors are studied based on the kinetic energy driven superconducting mechanism. The spin self-energy is evaluated explicitly in terms of the collective charge carrier modes in the particle–hole and particle–particle channels, and employed to calculate the dynamical spin structure factor. Our results show the existence of damped but well-defined dispersive spin excitations in the whole doping phase diagram. In particular, the charge carrier doping has a more modest effect on the high-energy spin excitations, and then the high-energy magnetic excitations retain roughly constant energy as a function of doping, with spectral weights and dispersion relations comparable to those found in the parent compound.

scholarly journals Robustness of magnetic and electric domains against charge carrier doping in multiferroic hexagonal ErMnO3

2016 ◽  
Vol 18 (4) ◽  
pp. 043015 ◽  
Author(s):  
E Hassanpour ◽  
V Wegmayr ◽  
J Schaab ◽  
Z Yan ◽  
E Bourret ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Carrier Doping

scholarly journals Kinetic-energy-driven superconductivity in cuprate superconductors

2015 ◽  
Vol 29 (16) ◽  
pp. 1530009 ◽  
Author(s):  
Shiping Feng ◽  
Yu Lan ◽  
Huaisong Zhao ◽  
Lülin Kuang ◽  
Ling Qin ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Kinetic Energy ◽  
Charge Carrier ◽  
Normal State ◽  
Cuprate Superconductors ◽  
Degree Of Freedom ◽  
Strong Electron ◽  
Spin Excitations ◽  
Carrier Doping ◽  
A Charge

Superconductivity in cuprate superconductors occurs upon charge-carrier doping Mott insulators, where a central question is what mechanism causes the loss of electrical resistance below the superconducting (SC) transition temperature? In this paper, we attempt to summarize the basic idea of the kinetic-energy-driven SC mechanism in the description of superconductivity in cuprate superconductors. The mechanism of the kinetic-energy-driven superconductivity is purely electronic without phonons, where the charge-carrier pairing interaction in the particle–particle channel arises directly from the kinetic energy by the exchange of spin excitations in the higher powers of the doping concentration. This kinetic-energy-driven d-wave SC-state is controlled by both the SC gap and quasiparticle coherence, which leads to that the maximal SC transition temperature occurs around the optimal doping, and then decreases in both the underdoped and overdoped regimes. In particular, the same charge-carrier interaction mediated by spin excitations that induces the SC-state in the particle–particle channel also generates the normal-state pseudogap state in the particle–hole channel. The normal-state pseudogap crossover temperature is much larger than the SC transition temperature in the underdoped and optimally doped regimes, and then monotonically decreases upon the increase of doping, eventually disappearing together with superconductivity at the end of the SC dome. This kinetic-energy-driven SC mechanism also indicates that the strong electron correlation favors superconductivity, since the main ingredient is identified into a charge-carrier pairing mechanism not from the external degree of freedom such as the phonon but rather solely from the internal spin degree of freedom of the electron. The typical properties of cuprate superconductors discussed within the framework of the kinetic-energy-driven SC mechanism are also reviewed.

Charge Carrier Doping into the Peierls Insulator of the TCNQ Anion Radical Salt (TCNQ = 7,7,8,8-Tetracyanoquinodimethane)

2016 ◽  
Vol 120 (21) ◽  
pp. 11545-11551 ◽  
Author(s):  
Hiroyuki Kubota ◽  
Yukihiro Takahashi ◽  
Hiroyuki Hasegawa ◽  
Takuro Shimada ◽  
Jun Harada ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Anion Radical ◽  
Radical Salt ◽  
Carrier Doping

scholarly journals Manipulating charge density waves in1T−TaS2by charge-carrier doping: A first-principles investigation

2016 ◽  
Vol 94 (12) ◽  
Author(s):  
D. F. Shao ◽  
R. C. Xiao ◽  
W. J. Lu ◽  
H. Y. Lv ◽  
J. Y. Li ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Charge Density ◽  
First Principles ◽  
Charge Density Waves ◽  
Density Waves ◽  
Carrier Doping
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