Energy gaps in high-transition-temperature cuprate superconductors
نویسندگان
چکیده
منابع مشابه
Energy gaps in Bi2Sr2CaCu2O8+δ cuprate superconductors
The relationship between the cuprate pseudogap (Δ(p)) and superconducting gap (Δ(s)) remains an unsolved mystery. Here, we present a temperature- and doping-dependent tunneling study of submicron Bi(2)Sr(2)CaCu(2)O(8+δ) intrinsic Josephson junctions, which provides a clear evidence that Δ(s) closes at a temperature T(c) (0) well above the superconducting transition temperature T(c) but far belo...
متن کاملEvidence for two separate energy gaps in underdoped high-temperature cuprate superconductors from broadband infrared ellipsometry.
We present broadband infrared ellipsometry measurements of the c-axis conductivity of underdoped RBa_{2}Cu_{3}O_{7-delta} (R=Y, Nd, and La) single crystals. Our data show that separate energy scales are underlying the redistributions of spectral weight due to the normal state pseudogap and the superconducting gap. Furthermore, they provide evidence that these gaps do not share the same electron...
متن کاملResistance of High-Temperature Cuprate Superconductors
Cuprate superconductors have many different atoms per unit cell. A large fraction of cells (525%) must be modified (“doped”) before the material superconducts. Thus it is not surprising that there is little consensus on the superconducting mechanism, despite almost 200,000 papers [1]. Most astonishing is that for the simplest electrical property, the resistance, “despite sustained theoretical e...
متن کاملHigh-energy kink observed in the electron dispersion of high-temperature cuprate superconductors.
Photoemission studies show the presence of a high-energy anomaly in the observed band dispersion for two families of cuprate superconductors, Bi2Sr2CaCu2O8+delta and La 2-x BaxCuO4. The anomaly, which occurs at a binding energy of approximately 340 meV, is found to be anisotropic and relatively weakly doping dependent. Scattering from short range or nearest neighbor spin excitations is found to...
متن کاملOrigin of the Pseudogap in High-Temperature Cuprate Superconductors
Computational details Calculations to compute the pseudogap (PG) from Equation 1 were performed by averaging 100 ensembles of 2,500 x 2,500 lattices. Four-site plaquettes were randomly doped up to x = 0.187, then three-site plaquettes up to x = 0.226, followed by two-site plaquettes to x = 0.271, and finally one-site plaquettes were doped until no d spins remained at x = 0.317. The details of t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature Physics
سال: 2014
ISSN: 1745-2473,1745-2481
DOI: 10.1038/nphys3009