High-Tc Cuprate Superconductors: Materials, Structures and Properties

Koblischka-Veneva, Anjela; Koblischka, Michael Rudolf

doi:10.1007/978-981-19-1211-5_7

Cited by 4 publications

(2 citation statements)

References 98 publications

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“…Traditional superconductors, known as low temperature superconductors (LTS), were first found in the early 20th century and function at very low temperatures, usually close to absolute zero. The finding of high temperature superconductors (HTS) in the late 20th century generated significant enthusiasm and conjecture among scientists [4]. HTS materials display superconducting properties at much greater temperatures compared to traditional materials, even surpassing the boiling point of liquid nitrogen.…”

Section: General Overviewmentioning

confidence: 99%

Review on Microwave Surface Resistance of High Temperature Superconductor Yttrium Barium Copper Oxide

Dahal,

Wang

2024

Preprint

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The performance of Yttrium-Barium Copper Oxide (YBCO) high-temperature superconductors in high-frequency applications is significantly affected by the microwave surface resistance (Rs). The paper delves into the basics, measuring methods and factors affecting the resistance (Rs) in YBCO, highlighting its high critical temperature (Tc) and low resistance, positioning it as a promising material. YBCO's compatibility with epitaxial growth and microstructure engineering offers opportunities to reduce grain boundary effects and improve Rs, making it advantageous for high-frequency electronics, communication systems, and MRI coils. This is due to its high critical current density (Jc) and exceptional Rs at practical temperatures. Challenges remain in comprehending and managing Rs in YBCO, despite its favorable characteristics. Utilizing advanced fabrication methods and incorporating nanotechnology allow for customization of YBCO-based devices. Multi-scale modeling and simulation are essential for guiding experimental work and understanding YBCO's performance in high-frequency settings. This study highlights the promise of YBCO for future high-frequency technologies and stresses the importance of more research to overcome hurdles and fully exploit its capabilities, potentially transforming superconducting devices for practical use.

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Section: General Overviewmentioning

confidence: 99%

Review on Microwave Surface Resistance of High Temperature Superconductor Yttrium Barium Copper Oxide

Dahal,

Wang

2024

Preprint

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“…For all the cuprate HTSc, the main element are the Cu-O-planes, which serve as the highway for superconductivity, and the other layers of the crystal structure serve as charge carrier reservoirs or just as spacing layers. Doping can be achieved by means of oxygenation, but also by doping with other atoms, either within the Cu-O-plane or in the charge carrier reservoir layers [100]. The main points are summarized in Table 1.…”

Section: Phase Diagrams Of Moiré Superconductors and Comparison With ...mentioning

confidence: 99%

Moiré Superconductivity and the Roeser-Huber Formula

Koblischka¹,

Koblischka-Veneva²

2023

Preprint

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As shown previously, a relation between the superconducting transition temperature and some characteristic distance in the crystal lattice holds, which enables the calculation of the superconducting transition temperature, Tc, based only on the knowledge of the electronic configuration and of some details of the crystallographic structure. This relation was found to apply for a large number of superconductors, including the high-temperature superconductors, the iron-based materials, alkali fullerides, metallic alloys, and element superconductors. When applying this scheme called Roeser-Huber formula to Moiré-type superconductivity, i.e., magic-angle twisted bi-layer graphene (tBLG) and bi-layer WSe2, we find that the calculated transition temperatures for tBLG are always higher than the available experimental data, e.g., for the magic angle 1.1∘, we find Tc≈ 4.2–6.7 K. Now, the question arises why the calculation produces larger Tc’s. Two possible scenarios may answer this question: (1) The given problem for experimentalists is the fact that for electric measurements always substrates/caps are required to arrange the electric contacts. When now discussing superconductivity in atomically thin objects, also these layers may play a role forming the Moiré patterns. The consequence of such substrate-induced super-Moiré patterns is that the resulting Moiré pattern always will show a larger cell size, and thus, a lower Tc of the final structure will result. (2) A correction factor to the Roeser-Huber formalism may be required to account for the low charge carrier density of the tBLG. Here, we test both scenarios and find that the introduction of a correction factor η enables a proper calculation of Tc, reproducing the experimental data. We find that η depends exponentially on the value of Tc.

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The Levitation Characteristics of HTS Bulks Under the Effect of Bridge Deflection Coupled with Random Excitations

Chi

Yang

et al. 2022

J Supercond Nov Magn

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High-Tc Cuprate Superconductors: Materials, Structures and Properties

Cited by 4 publications

References 98 publications

Review on Microwave Surface Resistance of High Temperature Superconductor Yttrium Barium Copper Oxide

Review on Microwave Surface Resistance of High Temperature Superconductor Yttrium Barium Copper Oxide

Moiré Superconductivity and the Roeser-Huber Formula

The Levitation Characteristics of HTS Bulks Under the Effect of Bridge Deflection Coupled with Random Excitations

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