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Research papers on Room-temperature superconductivity

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  1. Colloquium : Room temperature superconductivity: The roles of theory and materials design

    Warren E. Pickett · 2023 · Reviews of Modern Physics · 85 citations

    Superconductivity, discovered in 1911 and first theoretically understood in 1957, remains a fascinating phenomenon for reasons both fundamental and applied. Reliably calculating the critical temperature of a given material, and even more so predicting it, turned out to be a considerable challenge. This Colloquium explains how theoretical developments have led to increasingly reliable predictions that have culminated in the discovery of the hydride materials that display superconductivity under high pressure at temperatures just shy of room temperature.

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  3. Lifshitz transitions and zero point lattice fluctuations in sulfur hydride showing near room temperature superconductivity

    Antonio Bianconi, Thomas Jarlborg · 2015 · Novel Superconducting Materials · 27 citations

    Emerets’s experiments on pressurized sulfur hydride have shown that H3S metal has the highest known superconducting critical temperature Tc = 203 K. The Emerets data show pressure induced changes of the isotope coefficient between 0.25 and 0.5, in disagreement with Eliashberg theory which predicts a nearly constant isotope coefficient.We assign the pressure dependent isotope coefficient to Lifshitz transitions induced by pressure and zero point lattice fluctuations. It is known that pressure could induce changes of the topology of the Fermi surface, called Lifshitz transitions, but were neglected in previous papers on the H3S superconductivity issue. Here we propose thatH3S is a multi-gap su

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  6. Room Temperature Superconductivity: the Roles of Theory and Materials Design

    Warren E. Pickett · 2022 · arXiv (Cornell University) · 3 citations

    For half a century after the discovery of superconductivity, materials exploration for better superconductors proceeded without knowledge of the underlying mechanism. The 1957 BCS theory cleared that up: the superconducting state occurs due to pairing of electrons over the Fermi surface. Over the following half century higher critical temperature T$_c$ was achieved only serendipitously as new materials were synthesized. Meanwhile the formal theory of phonon-coupled superconductivity at the material-dependent level became highly developed: given a known compound, its value of T$_c$, the superconducting gap function, and several other properties of the superconducting state became available in

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  7. Path for Room-Temperature Superconductivity in Q-Carbon-Related Materials

    J. Narayan · 2024 · C – Journal of Carbon Research · 3 citations

    We present atomic structures and nonequilbrium synthesis of new class of materials, where the basic structural unit is a diamond tetrahedron. When units of one, two, and three tetrahedra are randomly packed, we create distinct phases of amorphous Q-carbon. Four tetrahedra in two adjacent layers lead to crystalline diamond lattice, which has four missing tetrahedra alternately. When these four missing tetrahedra are filled, we create subunit cell of crystalline Q-diamond. Theoretical calculations show that superconducting transition temperature (Tc) in 50 atomic % B-doped Q-diamond can reach near room temperature at ambient pressures. This is consistent with our earlier results using low-loss

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  10. Possibility of Superconductivity of 6Li+ Ions in Solid Electrolytes at Room Temperature Under Coherent Acoustic Phonons

    Kyuichi Yasui · 2025 · Materials · 2 citations

    It has been theoretically suggested that the de Broglie wavelength of Li ions could become longer than the Li atomic distance in solid electrolytes under coherent acoustic phonons at room temperature when thermal noise is sufficiently suppressed by them. This suggests that some quantum effect of Li ions (not electrons) could appear under this condition, which could possibly result in the superconductivity of 6Li+ ions (bosons) in solid electrolytes at room temperature. A lower frequency of coherent phonons is better for this possibility. A mechanism for the generation of coherent phonons by repetitive pulsed-laser irradiation or possibly by ultrasound irradiation using a transducer is also d

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  11. Statistical Material Law Support for Room Temperature Superconductivity in the Lead Apatite System

    Chen, Ning, Yang Liu, Li, Yang · 2023 · arXiv (Cornell University) · 1 citations

    Quantum mechanics calculations of an electronic orbital coupling distribution of the new possible Room Temperature (RT) system of lead apatite Pb10(PO4)6O system show that the complex orbital coupling characteristics of the new system are similar to those of copper oxide and with multiple orbital interactions. The overall bandwidth is significantly larger than the current largest copper oxide system, which can also be compared to near RT high-pressure hydride systems. By applying a material dependence law relating overall bandwidth to superconducting critical temperature across various typical superconducting systems, we predict that the electronic structure of the new material can support a

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  13. A Century of Progress Toward Room-Temperature Superconductivity: Materials Evolution, Mechanistic Insights, and Current Challenges

    RuiJie Guo · 2026 · BIO Web of Conferences

    Since the discovery of superconductivity in mercury in 1911, a central objective of the field has been to raise the superconducting transition temperature (Tc) toward room temperature. Over more than a century, this search has progressed through several distinct material paradigms: conventional phonon-mediated superconductors, strongly correlated cuprates and iron-based systems, and, most recently, hydrogen-rich compounds stabilised at megabar pressures. Each class has increased understanding of superconductivity, but each has also exposed a different bottleneck, from the limited transition temperatures of conventional materials to the mechanistic uncertainty of unconventional superconductor

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  17. Steady-State Exclusion Theory for Superconductivity: Constraints from Earth Material Evolution and Paradigm Reconstruction of Room-Temperature Superconductivity Research

    Relike Zhou · 2026 · Zenodo (CERN European Organization for Nuclear Research)

    Abstract Current ambient-pressure room-temperature superconductivity research suffers from poor reproducibility, academic controversies and misguided natural-mineral-based research routes, lacking cross-disciplinary fundamental constraints. This article is a theoretical Perspective. It presents no new experimental data but proposes a cross-disciplinary hypothesis and reorients research paradigms based on existing literature and logical deduction. Integrating geologic mineral evolution and condensed matter thermodynamics, this work originally proposes the Steady-State Exclusion Theory for Superconductivity (SSET). This theory demonstrates that Earth’s natural geological systems cannot generat

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  19. D≡T Application: Ambient-Pressure Room-Temperature Superconductivity – Exact Mechanism and Material Design

    Xuanzhe Tong · 2026 · Zenodo (CERN European Organization for Nuclear Research)

    Based on the D≡T axiom ∂_μΦ = Φ∂_μΦ, which unifies difference and transfer as a single ontological process, this work rigorously derives the exact microscopic mechanism of ambient-pressure room-temperature superconductivity (APRTS) without free parameters or empirical assumptions. Applying the theory to hexagonal boron nitride (hBN) with potassium intercalation yields an exact stability condition: the intrinsic lattice gradient ‖∇Φ‖ must exceed the thermal fluctuation threshold Φ_th(298 K) = (D₀³/(T₀² a₀))·k_B T. For K-intercalated hBN, this condition predicts a √3×√3 superstructure, a 3 eV band shift, and 74% layer expansion, leading to a predicted Tc of 310 K (37°C) at ambient pressure. An

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