λ-Ti3O5 is an intriguing phase-transition material that has been proposed to be metastable and has emerged at room temperature only in the form of nanocrystals. In this work, λ-Ti3O5 was stabilized to room temperature in the form of microcrystals by aluminum (Al)-ion doping. Al entered the Ti3O5 lattice in the substitutional mode, which reduced the threshold temperature (Tc) of the β-λ phase transition in Ti3O5 and maintained a λ-phase Ti3O5 at room temperature. Al doping caused a significant decrease in resistivity of Ti3O5, which corresponds to a semiconductor-metal transition that is induced by Al-ion doping. We have developed a mechanism to fabricate λ-Ti3O5 by ion doping and have provided a fundamental foundation for a more available application of λ-Ti3O5 in smart optoelectronic devices.

中文翻译：

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铝离子掺杂在室温下稳定λ-Ti3O5微晶

λ-Ti3O5 是一种有趣的相变材料，被认为是亚稳态的，并且在室温下仅以纳米晶体的形式出现。在这项工作中，λ-Ti3O5 通过铝 (Al) 离子掺杂以微晶的形式稳定到室温。Al 以置换模式进入 Ti3O5 晶格，降低了 Ti3O5 中 β-λ 相变的阈值温度 (Tc)，并在室温下保持了 λ 相 Ti3O5。Al 掺杂导致 Ti3O5 电阻率显着降低，这对应于由 Al 离子掺杂引起的半导体-金属转变。我们开发了一种通过离子掺杂制备 λ-Ti3O5 的机制，并为 λ-Ti3O5 在智能光电器件中的更多应用提供了基础。