Electronic and vibrational signatures of ruthenium vacancies in Sr2RuO4 thin films

被引：15

作者：

Kim, Gideok ^{[1
]}

Suyolcu, Y. Eren ^{[1
]}

Herrero-Martin, J. ^{[2
]}

Putzky, D. ^{[1
]}

Nair, H. P. ^{[3
]}

Ruf, J. P. ^{[4
]}

Schreiber, N. J. ^{[3
]}

Dietl, C. ^{[1
,5
,6
]}

Christiani, G. ^{[1
]}

Logvenov, G. ^{[1
]}

Minola, M. ^{[1
]}

van Aken, P. A. ^{[1
]}

Shen, K. M. ^{[4
,7
]}

Schlom, D. G. ^{[3
,7
]}

Keimer, B. ^{[1
]}

机构：

[1] Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany

[2] ALBA Synchrotron Light Source, E-08290 Barcelona, Spain

[3] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA

[4] Cornell Univ, Dept Phys, Ithaca, NY 14853 USA

[5] Inst for Basic Sci Korea, Ctr Artificial Low Dimens Elect Syst, 77 Cheongam Ro, Pohang 790784, South Korea

[6] Argonne Natl Lab, Adv Photon Source, Lemont, IL 60439 USA

[7] Kavli Inst Cornell Nanoscale Sci, Ithaca, NY 14853 USA

来源：

PHYSICAL REVIEW MATERIALS | 2019年 / 3卷 / 09期

基金：

美国国家科学基金会; 欧洲研究理事会;

关键词：

SUPERCONDUCTIVITY; SCATTERING; RAMAN;

D O I：

10.1103/PhysRevMaterials.3.094802

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The synthesis of stoichiometric Sr2RuO4 thin films has been a challenge because of the high volatility of ruthenium oxide precursors, which gives rise to ruthenium vacancies in the films. Ru vacancies greatly affect the transport properties and electronic phase behavior of Sr2RuO4, but their direct detection is difficult due to their atomic dimensions and low concentration. We applied polarized x-ray absorption spectroscopy at the oxygen K edge and confocal Raman spectroscopy to Sr2RuO4 thin films synthesized under different conditions. The results show that these methods can serve as sensitive probes of the electronic and vibrational properties of Ru vacancies, respectively. The intensities of the vacancy-related spectroscopic features extracted from these measurements are well correlated with the transport properties of the films. The methodology introduced here can thus help one to understand and control the stoichiometry and transport properties in films of Sr2RuO4 and other ruthenates.

引用

页数：7

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