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The only alkali metal known to be superconducting at ambient pressure is Li at 0.4 mK. Under 30 GPa pressure \textit{T}$_{c}$ for Li rises to 14 K. In addition, nearly 50 years ago the heavy alkali metal Cs was reported to become…

Superconductivity · Physics 2019-07-24 Yuhang Deng , James S. Schilling

Metallic hydrogen is capable of showing room temperature superconductivity, but its experimental syntheses are extremely hard. Therefore, it is desirable to reduce the synthesis pressure of metallic hydrogen by adding other chemical…

Superconductivity · Physics 2022-11-23 Zhongyu Wan , Ruiqin Zhang

Metallic hydrogen, existing in remarkably extreme environments, was predicted to exhibit long-sought room-temperature superconductivity. Although the superconductivity of metallic hydrogen has not been confirmed experimentally,…

Superconductivity · Physics 2024-06-12 Zihan Zhang , Wendi Zhao , Defang Duan , Tian Cui

Superconductivity with transition temperature $T_c=1.7$ K has been reported in bilayer graphene [1,2]. The main factors, which may shed light on the mechanism of the formation of this superconductivity, are the following. Superconductivity…

Superconductivity · Physics 2018-06-22 G. E. Volovik

Superconductivity commonly appears under pressure in charge density wave (CDW)-bearing transition metal dichalcogenides (TMDs), but has emerged so far only via either intercalation with electron donors or electrostatic doping in CDW-free…

The discovery of high critical temperature T_{c} superconductivity in highly compressed H_{3}S has opened up the question of searching for strong electron-phonon coupling in the hydrides outside the transition metal series. The specific…

Superconductivity · Physics 2019-08-08 P. -H. Chang , S. Silayi , D. A. Papaconstantopoulos , M. J. Mehl

The computational and experimental exploration of the phase diagrams of binary hydrides under high pressure has uncovered phases with novel stoichiometries and structures, some which are superconducting at quite high temperatures. Herein we…

Superconductivity · Physics 2019-03-08 Tiange Bi , Niloofar Zarifi , Tyson Terpstra , Eva Zurek

Exploration of superconductivity in light element compounds has drawn considerable attention because those materials can easily realize the high $T_{c}$ superconductivity, such as ${\mathrm{LnNi}}_{2}{\mathrm{B}_{2}}{\mathrm{C}}$ ($T_{c}$…

Superconductivity · Physics 2021-01-08 W. Wu , Y. J. Li , J. H. Zhang , Z. H. Yu , Z. Y. Liu , P. Zheng , H. X. Yang , C. Dong , K. Liu , T. Xiang , J. L. Luo

We present direct evidence of a superconducting state existing in the title compound below 300 mK under quasi-hydrostatic pressure. The superconducing transition is observed in the whole pressure range studied, 0 < P < 4 kbar. However, the…

Strongly Correlated Electrons · Physics 2007-05-23 D. Andres , M. V. Kartsovnik , W. Biberacher , K. Neumaier , H. Mueller

The theoretical maximum critical temperature ($T_c$) for conventional superconductors at ambient pressure remains a fundamental question in condensed matter physics. Through analysis of electron-phonon calculations for over 20,000 metals,…

Calculations of the electron-phonon interaction in the alkali metals, Potassium and Rubidium, using the results of band theory and BCS theory-based techniques suggest that at high pressures K and Rb would be superconductors with transition…

Superconductivity · Physics 2007-05-23 Lei Shi , Dimitrios A. Papaconstantopoulos , Michael J. Mehl

Motivated by unexpected reports of a 26 K superconducting transition in elemental titanium at high pressure, we carry out an accurate ab-initio study of its properties to understand the rationale for this observation. The critical…

Superconductivity · Physics 2023-08-29 Antonio Sanna , Camilla Pellegrini , Simone di Cataldo , Giannni Profeta , Lilia Boeri

Superconductors have the potential to revolutionize technology due to their ability to have zero electrical resistance. However, superconductor materials require either low temperatures or high pressures to function in a superconductive…

Superconductivity · Physics 2021-10-29 Ekram M Towsif

Structural and superconducting transitions of layered van der Waals (vdW) hydrogenated germanene (GeH) were observed under high-pressure compression and decompression processes. GeH possesses a superconducting transition at critical…

Recent high-pressure studies found that superconductivity can be achieved under very low pressure in the parent iron arsenide compound CaFe2As2, although details of the sharpness and temperature of transitions vary between liquid medium and…

Superconductivity · Physics 2009-11-13 W. Yu , A. A. Aczel , T. J. Williams , S. L. Bud'ko , N. Ni , P. C. Canfield , G. M. Luke

Single crystalline FeTe$_{0.61}$Se$_{0.39}$ with a sharp superconducting transition at $T_{\textrm{c}} \sim$ 14 K is synthesized via slow furnace cooling followed by low-temperature annealing. The effect of annealing on the chemical and…

Superconductivity · Physics 2015-05-13 T. Taen , Y. Tsuchiya , Y. Nakajima , T. Tamegai

We report experimental discovery of tantalum polyhydride superconductor. It was synthesized at high pressure and high temperature conditions using diamond anvil cell combined with in-situ high pressure laser heating techniques. The…

A key challenge in materials discovery is to find high-temperature superconductors. Hydrogen and hydride materials have long been considered promising materials displaying conventional phonon-mediated superconductivity. However, the high…

The electron-doped silicene under the influence of the biaxial tensile strain is predicted to be the phonon-mediated superconductor. By using the Eliashberg formalism, we investigate the thermodynamic properties of the superconducting…

Superconductivity · Physics 2015-02-03 A. P. Durajski , D. Szczȩśniak , R. Szczȩśniak

Highly conductive molecular junctions were formed by direct binding of benzene molecules between two Pt electrodes. Measurements of conductance, isotopic shift in inelastic spectroscopy and shot noise compared with calculations provide…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 M. Kiguchi , O. Tal , S. Wohlthat , F. Pauly , M. Krieger , D. Djukic , J. C. Cuevas , J. M. van Ruitenbeek