Interface Engineered Ferroelectric BaTiO₃//SrTiO₃ Heterostructures with Anomalous Clamped Polarization on Si (100)

Ming Liu Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX, 78249, USA; Key Lab of Materials Modification by Laser, Ion, Electron Beams, Dalian University of Technology, Dalian, 116024, P. R. China

Greg Collins Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX, 78249, USA

Emmaul Silva Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX, 78249, USA

Chunrui Ma Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX, 78249, USA

Jian Liu Key Lab of Materials Modification by Laser, Ion, Electron Beams, Dalian University of Technology, Dalian, 116024, P. R. China

Chonglin Chen Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX, 78249, USA

Jie He Department of Material Science and Engineering, University of Texas at Arlington, Arlington, TX, 76019

Jiechao Jiang Department of Material Science and Engineering, University of Texas at Arlington, Arlington, TX, 76019

Efstathios I. Meletis Department of Material Science and Engineering, University of Texas at Arlington, Arlington, TX, 76019

Shengwei Qu Key Lab of Materials Modification by Laser, Ion, Electron Beams, Dalian University of Technology, Dalian, 116024, P. R. China

Qingyu Zhang Key Lab of Materials Modification by Laser, Ion, Electron Beams, Dalian University of Technology, Dalian, 116024, P. R. China

Amma Bhalla Department of Electrical and Computer Engineering, University of Texas at San Antonio, San Antonio, TX, 78249, USA

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Abstract

Ferroelectric BaTiO₃//SrTiO₃ multilayered thin films were successfully grown on Si (100) substrates. Microstructure investigations reveal that the films have clear multilayered interface structures. A new piezoelectric phenomenon was discovered in which the clamped polarization domains can be adjusted by the periodicity of the layers. Such periodicity control can be used as a new device concept for designing and fabricating novel nanomechanical devices.

Acknowledgments

This research was partially supported by the National Science Foundation under NSF-NIRT-0709293 and NSF-DMR-0934218. Also, Mr. Ming Liu and Ms. Chunrui Ma would like to acknowledge the support from the “China Scholarship Council” for their Ph.D. researches at UTSA.

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Interface Engineered Ferroelectric BaTiO₃//SrTiO₃ Heterostructures with Anomalous Clamped Polarization on Si (100)

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Interface Engineered Ferroelectric BaTiO₃//SrTiO₃ Heterostructures with Anomalous Clamped Polarization on Si (100)