Publisher Correction: Room-temperature superconductivity in a carbonaceous sulfur hydride

Snider, Elliot; Dasenbrock-Gammon, Nathan; McBride, Raymond; Debessai, Mathew; Vindana, Hiranya; Vencatasamy, Kevin; Lawler, Keith V.; Salamat, Ashkan; Dias, Ranga

doi:10.1038/s41586-020-2955-8

Cited by 9 publications

(6 citation statements)

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“…However, we here choose phonon as the bosonic mediator for the attractive pairing interaction. Several recently discovered superconductors belonging to the hydride and super-hydride families are known to be based upon the phonon exchange mechanism, as pointed out earlier [1][2][3][4][5][6].…”

Section: Evaluation Of the Pairing Gapsmentioning

confidence: 94%

“…Meanwhile, in the last year, Dias et.al. had found a superconducting state at a temperature of 287.8K in a pressure driven carbonaceous sulfur hydride system [1]. The other high-temperature superconductors (HTSC), with a critical temperature(T c ) close to the ambient temperature, were mainly found in the pressure induced superhydride systems (e.g.LH 10 , Y H x ) [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Theoretical Analysis of Superconducting Pairing in Correlated Metallic Systems

Mandal,

Chaudhury

2021

Preprint

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We have introduced a Coulomb correlated normal state to study the superconducting pairing with a Fermi liquid(FL)-like normal phase background in a 3-dimensional system. The role of the Coulomb correlation has been actively incorporated by means of Gutzwiller projection scheme, in the presence of phonon mediated attractive electronelectron(AEE) interaction throughout the entire regime of its applicability. We variationally modulate the Coulomb correlation strength from the weak to the strong regime in our calculational procedure. The main highlight of our results is the appearance of a '2-gap-like' structure in the superconducting phase, arising out of the two-body interacting matrix elements, calculated in the presence of the active Coulomb correlation. We have made use of the 'two-square well model' potential to evaluate the superconducting pairing gaps at zero temperature. Our Calculational scheme has been applied to a simple cubic lattice system for a physical realization. All the consequences are elaborated and discussed.

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Section: Evaluation Of the Pairing Gapsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

A Theoretical Analysis of Superconducting Pairing in Correlated Metallic Systems

Mandal,

Chaudhury

2021

Preprint

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show abstract

Section: Introductionmentioning

confidence: 99%

“…In the search for high critical temperature (T c ) superconductors, significant progress has been made during the last decade [1][2][3]. Among thousands of hydride-based superconducting materials computationally predicted [4][5][6][7][8][9][10][11][12], mostly at very high pressures, e.g., P 100 GPa, dozens of them, e.g., H 3 S [1], LaH 10 [2], and CSH [3], were synthesized and tested. This active research area is presumably motivated by Ashcroft, who, in 2004, predicted [13] that high-T c superconductivity may be found in hydrogen dominant metallic alloys, probably at high P .…”

Section: Introductionmentioning

confidence: 99%

Machine-learning approach for discovery of conventional superconductors

Huan¹,

Vu²

2022

Preprint

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First-principles computations are the driving force behind numerous discoveries of hydride-based superconductors, mostly at high pressures, during the last decade. Machine-learning (ML) approaches can further accelerate the future discoveries if their reliability can be improved. The main challenge of current ML approaches, typically aiming at predicting the critical temperature Tc of a solid from its chemical composition and target pressure, is that the correlations to be learned are deeply hidden, indirect, and uncertain. In this work, we showed that predicting superconductivity at any pressure from the atomic structure is sustainable and reliable. For a demonstration, we curated a diverse dataset of 584 atomic structures for which λ and ω log , two parameters of the electronphonon interactions, were computed. We then trained some ML models to predict λ and ω log , from which Tc can be computed in a post-processing manner. The models were validated and used to identify two possible superconductors whose Tc 10 − 15K and zero pressure. Going forward, this strategy will be improved to better contribute to the discoveries of new superconductors.

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“…First, pure metals were studied, in which the superconducting transition temperatures T c were relatively low < 20 K. Then the era of high-temperature superconductivity (HTSC) began, represented by perovskites and layered compounds whose T c now approaches 200 K. At high pressures in sulfur, lanthanum and yttrium hydrides T c is even higher (see, for example, [1,2]). In 2020 a new record for sulfur hydride T c = 15 • C at 267 GPa [3] has been published in the journal Nature.…”

Section: Introductionmentioning

confidence: 99%

Josephson effect in nanographite films

S.G.

2022

Technical Physics

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In nanographite films, for the first time the Josephson current at room temperature has been obtained when measuring the current-voltage characteristics. Sach measurement confirms the earlier observations in nanographite film the effects of weak superconductivity: zeroing of the temperature dependence at 650 K of constant voltage on the sample when it exposed to an alternating microwave voltage due to the inverse Josephson effect, as well as the observation of local areas with the structure of magnetic vortices in a magnetic force microscope at room temperature. The resulting critical current value of 0.8 μA is significantly lower than expected values for the superconducting gap, as well as for pinning at the Bean--Levingston barrier. The measures for increasing the critical current is proposed. Keywords: Josephson effect, nanographite film, superconductivity, room temperature.

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Publisher Correction: Room-temperature superconductivity in a carbonaceous sulfur hydride

Cited by 9 publications

References 0 publications

A Theoretical Analysis of Superconducting Pairing in Correlated Metallic Systems

A Theoretical Analysis of Superconducting Pairing in Correlated Metallic Systems

Machine-learning approach for discovery of conventional superconductors

Josephson effect in nanographite films

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