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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Advances and Discoveries in Non-equilibrium Driven Nanomaterials and Thin Films
Presentation Title Emergence of Shallow Energy Levels in B-doped Q-carbon: A high- temperature Superconductor
Author(s) Ritesh Sachan, Jagdish Narayan, Jordan Hachtel, Juan Carlos Idrobo
On-Site Speaker (Planned) Ritesh Sachan
Abstract Scope We report the spectroscopic demonstration of the shallow-level energy states in the recently discovered B-doped Q-carbon Bardeen-Cooper-Schrieffer (BCS) high-temperature superconductor. The Q-carbon is synthesized by ultrafast melting and quenching, allowing for high B-doping concentrations which in- crease the superconducting transition temperature (Tc) to 36 K (compared to 4 K for B-doped diamond). The increase in Tc is attributed to the increased density of energy states near the Fermi level in B-doped Q-carbon, which give rise to superconducting states via strong electron-phonon coupling below Tc. These shallow-level energy states, however, are challenging to map due to limited spatial and energy resolu- tion. Here, we use ultrahigh energy resolution monochromated electron energy-loss spectroscopy (EELS), to detect and visualize the newly formed shallow-level energy states (vibrational modes) near the Fermi level (ranging 30e100 meV) of the B-doped Q-carbon.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Controlling Functional Properties in Oxide Nanocomposites via Strain, Defects and Interfaces
Controlling Nanoscale Eutectic Microstructures in Directionally Laser Melted Al-Cu Alloyed Thin Films
Development of Reactive Molecular Dynamics (MD) and Hybrid Reverse Monte Carlo (HRMC) Modeling to Synthesize Amorphous Boron Carbide
Discoveries of Q-carbon and Q-BN and Direct Conversion of Carbon into Diamond and h-BN into c-BN
Dynamically Evolving Metastability in an Atomic Hourglass: Temporal Control of the Metal-insulator Transition of VO2 by a Mobile Dopant
Effect of Interfacial Strain on the Point-defect Energetics in LaNiOx
Emergence of Shallow Energy Levels in B-doped Q-carbon: A high- temperature Superconductor
Enhanced Field Emission of CNT-W Nanowire Hierarchical Emitters
Fabrication of Nanodiamond and Q-carbon by Ultrafast Quenching of Carbon Structures for Electron Field Emission Devices
Formation of Reduced Graphene Oxide/amorphous Carbon P-N Junctions via Highly Nonequilibrium Route of Nanosecond Laser Irradiation
Heat Capacity and Free Energy of Ni-Fe Nanocrystals
In-situ and Real Time Chemical Analysis of Complex Oxide Thin Film Surfaces using Pulsed Laser Deposition
Laser Processing in the Transmission Electron Microscope
Metastable Silicon Nanocomposites via Plasma Synthesis and Spark Plasma Sintering
Microstructure Morphology and Concentration Modulation of Bicontinuous Nanocomposite Thin-films during Physical Vapor Deposition
Morphological Evolution of Phase-separated Domains in Vapor-deposited Polycrystalline Alloy Films
N-1: In-situ Analysis of IR Laser Radiation Damage on Nano-structured MoS2
N-2: Scalable Synthesis of Graphene Quantum Dots and Its Application in Bioimaging
N-3: Synthesis of Mesoporous Metal-Silicates via Silicate-Exfoliation on Metal Hydroxides
Quasi-one-dimensional Mo Chains for Efficient Hydrogen Evolution Reaction
Recent Advances in Thin Film Thermoelectrics: SnSe and Beyond
Stabilization of High-temperature Polymorphs of SrSnO3 at Room Temperature via Epitaxy
Surface Chemistry Evolution in Ti-BNNT System Processed by SPS and its Correlation to Physico-chemical and Mechanical Properties
Synthesis and Densification of Functional Metal-oxide Nano Bulk Composite with Far from Equilibrium State
Tunable 2D Materials from Synthesis to Applications
Understanding the Effects of Lattice Strain on MoS2 through Irradiation

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