Janus Ti2CSH MXene: A New 2D Superconductor with Promising Stability

Janus MXene Ti2CSH Superconductivity

The ongoing search for two-dimensional superconductors has taken an exciting turn with the theoretical prediction of superconductivity in a novel Janus MXene, known as Ti2CSH. A collaborative team led by Jakkapat Seeyangnok and Udomsilp Pinsook from Chulalongkorn University has presented a detailed computational investigation demonstrating that this material combines structural stability with electron–phonon interactions strong enough to yield superconductivity. Their work predicts a critical temperature (Tc) of around 22.6 Kelvin, positioning Ti2CSH as one of the most promising candidates for low-dimensional superconducting applications.

What Makes Janus MXenes Special?

MXenes are a family of two-dimensional transition metal carbides and nitrides, already renowned for their versatility in energy storage, catalysis, and sensing. Janus MXenes introduce an additional layer of asymmetry: different atomic terminations on opposite sides of the sheet. This structural imbalance gives rise to unique electronic and vibrational properties, making them fertile ground for discovering new physical phenomena.

In Ti2CSH, titanium, carbon, sulfur, and hydrogen atoms combine to form a layered structure with intrinsic asymmetry. Computational models reveal that this arrangement not only stabilizes the lattice but also enhances electron–phonon coupling, the key mechanism that drives superconductivity in many materials.

Computational Insights into Superconductivity

Using Density Functional Theory (DFT), molecular dynamics simulations, and advanced electron–phonon coupling codes, the researchers assessed the dynamical stability and superconducting potential of Ti2CSH. Results show:

  • Structural stability confirmed by negative formation energy and elastic constants.
  • Phonon spectra free of imaginary modes, ensuring dynamical stability.
  • Electronic bands crossing the Fermi level, dominated by titanium orbitals.
  • A predicted superconducting gap consistent with a single-gap superconducting state.

Importantly, the predicted Tc of 22.6 K is above the boiling point of liquid hydrogen, making Ti2CSH not only academically intriguing but also technologically viable for cryogenic superconducting circuits.

Why This Matters

Superconductivity in low-dimensional systems is more than a scientific curiosity. It underpins the development of next-generation quantum devices, low-power electronics, and superconducting sensors. A stable, hydrogenated Janus MXene like Ti2CSH could be a stepping stone toward scalable quantum technologies and nanoscale superconducting circuits.

This research also demonstrates the power of computational materials discovery. By leveraging high-throughput simulations and validating predictions against databases such as the Open Quantum Materials Database, scientists can accelerate the identification of promising candidates before experimental synthesis.

Future Directions

While Ti2CSH remains a theoretical prediction, its stability and superconducting potential make it a strong candidate for experimental realization. If synthesized, it would join a small but growing class of 2D superconductors beyond graphene and transition metal dichalcogenides.

This work also points toward broader exploration of hydrogenated Janus superconductors. By systematically varying compositions across the transition metals and surface terminations, researchers could map out an entirely new family of 2D superconductors with tunable properties.

For more details, you can read the original article here: Ti2CSH Janus MXene Exhibits Superconductivity .

*This article was prepared with the assistance of AI technologies to support research communication.*

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