Superconductivity at 250 K in lanthanum hydride under high pressures

Abstract

The discovery of superconductivity at 203 K in H3S brought attention back to conventional superconductors whose properties can be described by the Bardeen-Cooper-Schrieffer (BCS) and the Migdal-Eliashberg theories. These theories predict that high, and even room temperature superconductivity (RTSC) is possible in metals possessing certain favorable parameters such as lattice vibrations at high frequencies. However, these general theories do not suffice to predict real superconductors. New superconducting materials can be predicted now with the aid of first principles calculations based on Density Functional Theory (DFT). In particular, the calculations suggested a new family of hydrides possessing a clathrate structure, where the host atom (Ca, Y, La) is at the center of the cage formed by hydrogen atoms. For LaH10 and YH10 superconductivity, with critical temperatures Tc ranging between 240 and 320 K is predicted at megabar pressures. Here, we report superconductivity with a record Tc ~ 250 K within the Fm-3m structure of LaH10 at a pressure P ~ 170 GPa. We proved the existence of superconductivity at 250 K through the observation of zero-resistance, isotope effect, and the decrease of Tc under an external magnetic field, which suggests an upper critical magnetic field of 120 T at zero-temperature. The pressure dependence of the transition temperatures Tc (P) has a maximum of 250-252 K at the pressure of about 170 GPa. This leap, by ~ 50 K, from the previous Tc record of 203 K indicates the real possibility of achieving RTSC (that is at 273 K) in the near future at high pressures and the perspective of conventional superconductivity at ambient pressure.

References in corpus (10)

• Crystal Structure Prediction via Particle Swarm Optimization
• Conventional superconductivity at 203 K at high pressures
• Evidence for superconductivity above 260 K in lanthanum superhydride at megabar pressures
• Ab initio Random Structure Searching
• Superconductive "sodalite"-like clathrate calcium hydride at high pressures
• Ab-initio theory of superconductivity - I: Density functional formalism and approximate functionals
• High Pressure and Road to Room Temperature Superconductivity
• Superconductivity in sodalite-like yttrium hydride clathrates
• Origin of High-Temperature Superconductivity in Compressed LaH${}_{10}$
• Superconductivity at 215 K in lanthanum hydride at high pressures

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• A first-principles study of superconductivity on RbH by doping without applied pressure
• Superconductivity in the layered cage compound Ba3Rh4Ge16
• Chemical physics of superconductivity in layered yttrium carbide halides from first principles
• Crystal Chemistry at High Pressure
• Evidence of Molecular Hydrogen in the N-doped LuH3 System: a Possible Path to Superconductivity?
• Characterization of near-room-temperature superconductivity in yttrium superhydrides
• Unconventional superconductivity in $\zeta$-phase of oxygen compressed to megabar pressure
• Observation of the Josephson effect in superhydrides: DC SQUID based on (La,Ce)H${}_{10+x}$ with operating temperature of 179 K
• Experimental and Computational Determination of Optimal Boron Content in Layered Superconductor Sc${}_{20}$C${}_{8-x}$B${}_x$C${}_{20}$
• Facile synthesis of palladium hydride via ionic gate-driven protonation using a deep eutectic solvent
• Increased critical temperature $T_c$ in the ideal anisotropic boson gas
• Theoretical Predictions of MB5N5: Atom-Stuffed Boronitride Clathrate Cages Derived from the High-Pressure Superhydride
• Double-valued strong-coupling corrections to Bardeen-Cooper-Schrieffer ratios
• Massive electrons and unconventional room-temperature superconductivity in superhydrides
• Surface-acoustic-wave-induced unconventional superconducting pairing
• HTSC-2025: A Benchmark Dataset of Ambient-Pressure High-Temperature Superconductors for AI-Driven Critical Temperature Prediction
• Realizing high-temperature superconductivity in compressed molecular-hydrogen through Li doping
• Correlation between Fermi surface reconstruction and superconductivity in pressurized FeTe0.55Se0.45
• Second harmonic AC calorimetry technique within a diamond anvil cell
• Search for thermodynamically stable ambient-pressure superconducting hydrides in GNoME database
• Einstein and Debye temperatures, electron-phonon coupling constant and a probable mechanism for ambient-pressure room-temperature superconductivity in intercalated graphite
• Strong-coupling character of superconducting phase in compressed selenium hydride
• Infrared imaging of samples in ultra high pressure diamond anvil cells
• Temperature of superconducting transition for very strong coupling in antiadiabatic limit of Eliashberg equations
• Effect of van Hove singularity on the isotope effect and critical temperature of H${}_3$S hydride superconductor as a function of pressure
• Photochemical Synthesis of P-S-H Ternary Hydride at High Pressures
• The Isotope Effect and Critical Magnetic Fields of Superconducting YH${}_6$: A Migdal-Eliashberg Theory Approach
• A15 Nb${}_3$Si -- A "high" Tc superconductor synthesized at a pressure of one megabar and metastable at ambient conditions
• Dynamical Approach to Realize Room-Temperature Superconductivity in LaH${}_{10}$
• Composite Pressure Cell for Pulsed Magnets
• Oscillatory magnetic field-dependent critical temperatures of ultraclean Type-II superconductors
• Enhancement of superconductivity on thin film of Sn under high pressure
• Pauli 'unlimited': magnetic field induced-superconductivity in UTe${}_2$
• Anharmonicity and Coulomb pseudopotential effects on superconductivity in YH${}_6$ and YH${}_9$
• Coupled First-Order Transitions In A Fermi-Bose Mixture
• Introduction to High-Temperature Superconductivity for Solid State Chemists
• Multiband Quantum Materials
• AC sensing using nitrogen vacancy centers in a diamond anvil cell up to 6 GPa
• A large modulation of electron-phonon coupling and an emergent superconducting dome in doped strong ferroelectrics
• High-pressure magnetic transition in iron observed via diamond quantum sensing
• Appraising the absolute limits of nanotubes and nanospheres to preserve high-pressure materials
• Beyond on-site Hubbard interaction in charge dynamics of cuprate superconductors
• High-$T_{\mathrm{c}}$ Ag${}_x$BC and Cu${}_x$BC superconductors accessible via topochemical reactions
• Competing Hydrogenation Pathways to Metastable CaH${}_6$ Revealed by Machine-Learning-Potential Molecular Dynamics
• Capturing nuclear quantum effects in high-pressure superconducting hydrides and ice with nuclear-electronic orbital theory
• Strain-triggered high-temperature superconducting transition in two-dimensional carbon allotrope
• Composition-Based Machine Learning for Screening Superconducting Ternary Hydrides from a Curated Dataset
• BCS superconductivity in ionic hydrides using chemical capacitor setup
• Iterative learning scheme for crystal structure prediction with anharmonic lattice dynamics
• The use of LEDs as a light source for fluorescence pressure measurements
• Elucidating the Inter-system Crossing of the Nitrogen-Vacancy Center up to Megabar Pressures
• Applied electric field instead of pressure in H-based superconductors
• Carrier-potential interaction for high-Tc superconductivity
• Non-monotonic dependence of $T_c$ on the c axis compression in the HTSC cuprate La${}_{2-x}$Sr${}_x$CuO${}_4$
• Superconductivity in Shear Strained Semiconductors
• Real-space orbital tiling approach for the design of novel superconductors
• Tracing the main elements and electron orbitals that induce superconducting phase transition
• On the breakdown of the Born-Oppenheimer approximation in LiH and LiD
• First-Principles Calculation of Superconducting $T_c$ in Superhard B-C-N Metals
• Sequence of superconducting states in field cooled $FeC{r}_2{S}_4$
• Superconducting Hydride Mg2RhH6 Experimentally Achieved at Lower Pressure
• Superconducting ternary compounds Li-X-B (X=Mo, W) within the mild pressure range: First-principles predictions
• Theoretical prediction of strong-coupling superconductivity in a hypothetical NaAlH3 phase at ambient pressure