RETRACTED ARTICLE: Evidence of near-ambient superconductivity in a N-doped lutetium hydride

Dasenbrock-Gammon, Nathan; Snider, Elliot; McBride, Raymond; Pasan, Hiranya; Durkee, Dylan; Khalvashi-Sutter, Nugzari; Munasinghe, Sasanka; Dissanayake, Sachith; Lawler, Keith V.; Salamat, Ashkan; Dias, Ranga

doi:10.1038/s41586-023-05742-0

Cited by 132 publications

(201 citation statements)

References 72 publications

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“…The team confirmed NLH's superconducting properties using three experimental signatures: at the same temperature, the material's electric resistance drops to zero, its heat capacity changes abruptly, as does its behavior in a magnetic field-a property known as magnetic susceptibility. The findings were published yesterday in Nature [1].…”

Section: Physicists Have Long Touted the Technological Revolutions Th...mentioning

confidence: 93%

Muted Response to New Claim of a Room-Temperature Superconductor

Chen¹

2023

Physics

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Section: Physicists Have Long Touted the Technological Revolutions Th...mentioning

confidence: 93%

Muted Response to New Claim of a Room-Temperature Superconductor

Chen¹

2023

Physics

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“…Many recent studies have pointed to the possibility of achieving room-temperature superconductivity in the hydride compounds at high pressure [17], following on Ashcroft's early intuition for metallic hydrogen [201]. Recent experimental evidence points at superconductive behaviour in nitrogen-doped lutetium hydride thin films at pressures as low as 10kbar [202].…”

Section: B Hydridesmentioning

confidence: 99%

Anharmonic theory of superconductivity and its applications to emerging quantum materials

Setty¹,

Baggioli²,

Zaccone³

2023

Preprint

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The role of anharmonicity on superconductivity has often been disregarded in the past. Recently, it has been recognized that anharmonic decoherence could play a fundamental role in determining the superconducting properties (electron-phonon coupling, critical temperature, etc) of a large class of materials, including systems close to structural soft-mode instabilities, amorphous solids and metals under extreme high-pressure conditions. Here, we review recent theoretical progress on the role of anharmonic effects, and in particular certain universal properties of anharmonic damping, on superconductivity. Our focus regards the combination of microscopic-agnostic effective theories for bosonic mediators with the well-established BCS theory and Migdal-Eliashberg theory for superconductivity. We discuss in detail the theoretical frameworks, their possible implementation within first-principles methods, and the experimental probes for anharmonic decoherence. Finally, we present several concrete applications to emerging quantum materials, including hydrides, ferroelectrics and systems with charge density wave instabilities. Contents

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“…It was therefore quite exciting when a recent experimental manuscript reported superconductivity near roomtemperature, T c = 294 K, at a very moderate pressure of 10 kbar (1 GPa) in a nitrogen-doped lutetium hydride phase [31]. This pressure is low enough so that it becomes feasible to use pressure-quenching [32] to stabilize the material to ambient conditions, or to use careful strain engineering to achieve the desired superconductivity.…”

Section: Introductionmentioning

confidence: 99%

“…This pressure is low enough so that it becomes feasible to use pressure-quenching [32] to stabilize the material to ambient conditions, or to use careful strain engineering to achieve the desired superconductivity. Unfortunately, though a variety of techniques including X-ray diffraction (XRD), energy-dispersive X-ray measurements, elemental analysis and Raman spectroscopy were used to characterize the superconducting material, its composition and structure could not be fully resolved [31].…”

Section: Introductionmentioning

confidence: 99%

Structure, Stability and Superconductivity of N-doped Lutetium Hydrides at kbar Pressures

Hilleke¹,

Wang²,

Luo³

et al. 2023

Preprint

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The structure of the material responsible for the room temperature and near ambient pressure superconductivity reported in an N-doped lutetium hydride [Nature, 615, 244 (2023)] has not been conclusively determined. Herein, density functional theory calculations are performed in an attempt to uncover what it might be. Guided by a range of strategies including crystal structure prediction and modifications of existing structure types, we present an array of Lu-N-H phases that are dynamically stable at experimentally relevant pressures. Although none of the structures found are thermodynamically stable, and none are expected to remain superconducting above ∼17 K at 10 kbar, a number of metallic compounds with fcc Lu lattices -as suggested by the experimental X-ray diffraction measurements of the majority phase -are identified. The system whose calculated equation of states matches best with that measured for the majority phase is fluorite-type LuH2, whose 10 kbar superconducting critical temperature was estimated to be 0.09 K using the Allen-Dynes modified McMillan equation.

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RETRACTED ARTICLE: Evidence of near-ambient superconductivity in a N-doped lutetium hydride

Cited by 132 publications

References 72 publications

Muted Response to New Claim of a Room-Temperature Superconductor

Muted Response to New Claim of a Room-Temperature Superconductor

Anharmonic theory of superconductivity and its applications to emerging quantum materials

Structure, Stability and Superconductivity of N-doped Lutetium Hydrides at kbar Pressures

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