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Related Experiment Video

Updated: Aug 28, 2025

Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride

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Published on: July 8, 2021

Record high T_c element superconductivity achieved in titanium.

Changling Zhang^1,2, Xin He^1,2,3, Chang Liu⁴

¹Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, 100190, Beijing, China.

Nature Communications

|September 15, 2022

Summary

This summary is machine-generated.

Researchers discovered superconductivity (SC) in titanium at temperatures above 20 K under high pressure. This finding challenges conventional theories and opens new avenues for discovering novel high-temperature superconductors.

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Area of Science:

Materials Science
Condensed Matter Physics
Solid State Chemistry

Background:

Conventional BCS theory typically does not favor superconductivity in transition metals due to d-electron behavior.
Discovering high-temperature superconductivity (SC) in elemental materials remains a significant challenge.

Purpose of the Study:

To experimentally investigate superconductivity in titanium under extreme pressure conditions.
To explore unconventional mechanisms driving high-temperature superconductivity in simple materials.

Main Methods:

High-pressure experiments were conducted on titanium.
Superconducting transition temperatures (Tc) were measured across a wide pressure range.
Critical magnetic fields (Hc2) and coherence lengths were estimated.

Main Results:

Superconductivity was observed in titanium at pressures from 108 GPa to 310 GPa.
Record high Tc values were achieved, with Tc onset above 26.2 K and zero resistance Tc of 21 K.
Estimated Hc2(0) reached approximately 32 Tesla with a coherence length of 32 Å.
Evidence suggests strong s-d electron transfer and d-band dominance, indicating correlation-driven SC.

Conclusions:

The discovery of high Tc superconductivity in titanium under pressure challenges existing theoretical models based solely on electron-phonon coupling.
The findings highlight the potential of pressure-tuned unconventional mechanisms for discovering high-Tc superconductors in simple elemental systems.
This research opens a new pathway for the rational design and discovery of novel superconducting materials.