Electrical transport and thermopower of reduced Ruddlesden-Popper phase Srn+1TinO3n+1-δ (n = 1, 2, 3, ∞) thin films

IF 3.1 4区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Current Applied Physics Pub Date : 2025-09-11 DOI:10.1016/j.cap.2025.09.009

Zhen Yang , Bingxu Liu , Zhuangzhi Li , Xi Han , Zilin Ye , Cici Jin

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Abstract

High quality Ruddlesden-Popper phase Sr_n+1Ti_nO_3n+1 (n = 1, 2, 3, ∞) thin films were epitaxially grown on LaAlO₃ (001) single crystal substrates using pulsed laser deposition and then reduced in a gas mixture of H₂ and Ar at 1473 K. Their conductivities and Seebeck coefficients were investigated by focusing on various transport mechanisms. At low temperatures, the conductivity results show that electron-electron interactions dominate electrical transport. At room temperature, both conductivity and Seebeck coefficient results indicate that conduction follows the small polaron model. At 300 K, the power factors for SrTiO_3-δ, Sr₄Ti₃O_10-δ and Sr₃Ti₂O_7-δ reduced thin films reach 0.016, 0.017, and 0.006 mW/m⋅K², respectively.

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还原Ruddlesden-Popper相Srn+1TinO3n+1-δ (n = 1,2,3,∞)薄膜的电输运和热能

采用脉冲激光沉积技术在LaAlO3（001）单晶衬底上外延生长出高质量的Ruddlesden-Popper相Srn+1TinO3n+1 （n = 1,2,3,∞）薄膜，然后在1473 K的H2和Ar混合气体中还原。通过研究不同的输运机制，研究了它们的电导率和塞贝克系数。在低温下，电导率结果表明电子-电子相互作用主导电输运。在室温下，电导率和塞贝克系数的结果都表明，电导率遵循小极化子模型。在300 K时，SrTiO3-δ、Sr4Ti3O10-δ和Sr3Ti2O7-δ还原薄膜的功率因数分别达到0.016、0.017和0.006 mW/m⋅K2。

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来源期刊

Current Applied Physics 物理-材料科学：综合

CiteScore

4.80

自引率

0.00%

发文量

213

审稿时长

33 days

期刊介绍： Current Applied Physics (Curr. Appl. Phys.) is a monthly published international journal covering all the fields of applied science investigating the physics of the advanced materials for future applications. Other areas covered: Experimental and theoretical aspects of advanced materials and devices dealing with synthesis or structural chemistry, physical and electronic properties, photonics, engineering applications, and uniquely pertinent measurement or analytical techniques. Current Applied Physics, published since 2001, covers physics, chemistry and materials science, including bio-materials, with their engineering aspects. It is a truly interdisciplinary journal opening a forum for scientists of all related fields, a unique point of the journal discriminating it from other worldwide and/or Pacific Rim applied physics journals. Regular research papers, letters and review articles with contents meeting the scope of the journal will be considered for publication after peer review. The Journal is owned by the Korean Physical Society.