Room Temperature Superconductivity

Luiz, A. M.

doi:10.5772/36535

Cited by 3 publications

(2 citation statements)

References 41 publications

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“…Some ideas on this issue can be found e.g. in [18] where the possibility to find this phenomenon in living tissues is also discussed. The first question raised in this reference, as in many other papers elsewhere, is electron pairing where the mediators of pairing are not phonons, but other quasi-particles.…”

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confidence: 99%

Surface-plasmon–assisted electron pair formation in strong electromagnetic field

Kroó

Rácz

Varró

2014

EPL

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The basis of low-temperature superconductivity has been set to be the pair formation of electrons, due to their effective attraction. The appearance of an effective attraction potential has also been predicted for electron-electron scattering in the presence of strong, inhomogeneous radiation field. In the present work the strong electromagnetic fields were created by femtosecond Ti:Sa lasers, used to excite surface plasmons in gold films at room temperature in the Kretschmann geometry. Experimental investigations were carried out using a surface plasmon near field scanning tunneling microscope, measuring it's response to the excitation at hot spots on the gold surface. Furthermore, the spectra of photoelectrons, liberated by multi-plasmon absorption, has also been measured by a timeof-flight spectrometer. In both cases new type of anomalies in the electron signal have been measured in the same intensity range, whose existence may be qualitatively understood, by using the intensity-dependent expression for the effective electronelectron scattering potential, derived earlier in a different context.

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confidence: 99%

Surface-plasmon–assisted electron pair formation in strong electromagnetic field

Kroó

Rácz

Varró

2014

EPL

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“…Since the discovery of the first superconductor(1), many efforts to search for new roomtemperature superconductors have been carried out worldwide (2,3) through their experimental clarity or/and theoretical perspectives (4)(5)(6)(7)(8). The recent success of developing room-temperature superconductors with hydrogen sulfide (9) and yttrium super-hydride (10) has great attention worldwide, which is expected by strong electron-phonon coupling theory with high-frequency hydrogen phonon modes (11,12).…”

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confidence: 99%

A Study on the Improvement of the System for the Activation of Youth Housing Supply in Seoul - Focused on the Case of Jamsil-dong Songpa-gu Seoul

Lee¹,

Seo²

2020

judik

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Using the thermal Green's function approach we propose a general method to investigate entanglement of the vacuum state or thermal ground states in an arbitrary dimensional space-time. As an application we show quantum separability of the massive thermal scalar field vacuum in the 1+1 dimensional cylindrical space-time. Separability is demonstrated using the positive partial transpose criterion for effective two-mode Gaussian states of collective operators. In this case, for all mass and temperature values entanglement is absent between the collective operators.

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Superconductivity in HEA-Type Compounds

Mizuguchi¹,

Yamashita²

2021

Advances in High-Entropy Alloys - Materials Research, Exotic Properties and Applications

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Since the discovery of superconductivity in a high-entropy alloy (HEA) Ti-Zr-Nb-Hf-Ta in 2014, the community of superconductor science has explored new HEA superconductors to find the merit of the HEA states on superconducting properties. Since 2018, we have developed “HEA-type” compounds as superconductors or thermoelectric materials. As well known, compounds like intermetallic compounds or layered compounds are composed of multi crystallographic sites. In a HEA-type compounds, one or more sites are alloyed and total mixing entropy satisfies with the criterion of HEA. Herein, we summarize the synthesis methods, the crystal structural variation and superconducting properties of the HEA-type compounds, which include NaCl-type metal tellurides, CuAl2-type transition metal zirconides, high-Tc cuprates, and BiS2-based layered superconductors. The effects of the introduction of a HEA site in various kinds of complicated compounds are discussed from the structural-dimensionality viewpoint.

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Room Temperature Superconductivity

Cited by 3 publications

References 41 publications

Surface-plasmon–assisted electron pair formation in strong electromagnetic field

Surface-plasmon–assisted electron pair formation in strong electromagnetic field

A Study on the Improvement of the System for the Activation of Youth Housing Supply in Seoul - Focused on the Case of Jamsil-dong Songpa-gu Seoul

Superconductivity in HEA-Type Compounds

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