Direct observation of ferroelectric polarization-modulated band bending at oxide interfaces

B. C. Huang; Y. T. Chen; Y. P. Chiu; Y. C. Huang; J. C. Yang; Y. C. Chen; Y. H. Chu

doi:10.1063/1.3691615

Direct observation of ferroelectric polarization-modulated band bending at oxide interfaces

B. C. Huang, Y. T. Chen, Y. P. Chiu^*, Y. C. Huang, J. C. Yang, Y. C. Chen, Y. H. Chu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

This study presents a direct visualization of the influences of ferroelectric polarization on the electronic properties of the Schottky contact at the Nb-SrTiO ₃/BiFeO ₃ hetero-interface using scanning tunneling microscopy and spectroscopy (STM/S). The evolution of the local density of states across the Nb-SrTiO ₃/BiFeO ₃ interface reveals the interfacial band alignment and the characteristic quantities of the metal/ferroelectric contact. The unique combination of STM and STS in this study delivers an approach to obtain critical information on the interfacial electronic configurations of ferroelectric oxide interfaces and also their variation with ferroelectric polarization switching.

Original language	English
Article number	122903
Journal	Applied Physics Letters
Volume	100
Issue number	12
DOIs	https://doi.org/10.1063/1.3691615
Publication status	Published - 2012 Mar 19
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3691615

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title = "Direct observation of ferroelectric polarization-modulated band bending at oxide interfaces",

abstract = "This study presents a direct visualization of the influences of ferroelectric polarization on the electronic properties of the Schottky contact at the Nb-SrTiO 3/BiFeO 3 hetero-interface using scanning tunneling microscopy and spectroscopy (STM/S). The evolution of the local density of states across the Nb-SrTiO 3/BiFeO 3 interface reveals the interfacial band alignment and the characteristic quantities of the metal/ferroelectric contact. The unique combination of STM and STS in this study delivers an approach to obtain critical information on the interfacial electronic configurations of ferroelectric oxide interfaces and also their variation with ferroelectric polarization switching.",

author = "Huang, {B. C.} and Chen, {Y. T.} and Chiu, {Y. P.} and Huang, {Y. C.} and Yang, {J. C.} and Chen, {Y. C.} and Chu, {Y. H.}",

note = "Funding Information: The authors would like to thank the National Science Council of the Republic of China, Taiwan, for financially supporting this research under Contract Nos. NSC 98-2112-M-110-005-MY3 and NSC-100-2119-M-009-003.",

year = "2012",

month = mar,

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doi = "10.1063/1.3691615",

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journal = "Applied Physics Letters",

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AU - Huang, B. C.

AU - Chen, Y. T.

AU - Chiu, Y. P.

AU - Huang, Y. C.

AU - Yang, J. C.

AU - Chen, Y. C.

AU - Chu, Y. H.

N1 - Funding Information: The authors would like to thank the National Science Council of the Republic of China, Taiwan, for financially supporting this research under Contract Nos. NSC 98-2112-M-110-005-MY3 and NSC-100-2119-M-009-003.

PY - 2012/3/19

Y1 - 2012/3/19

N2 - This study presents a direct visualization of the influences of ferroelectric polarization on the electronic properties of the Schottky contact at the Nb-SrTiO 3/BiFeO 3 hetero-interface using scanning tunneling microscopy and spectroscopy (STM/S). The evolution of the local density of states across the Nb-SrTiO 3/BiFeO 3 interface reveals the interfacial band alignment and the characteristic quantities of the metal/ferroelectric contact. The unique combination of STM and STS in this study delivers an approach to obtain critical information on the interfacial electronic configurations of ferroelectric oxide interfaces and also their variation with ferroelectric polarization switching.

AB - This study presents a direct visualization of the influences of ferroelectric polarization on the electronic properties of the Schottky contact at the Nb-SrTiO 3/BiFeO 3 hetero-interface using scanning tunneling microscopy and spectroscopy (STM/S). The evolution of the local density of states across the Nb-SrTiO 3/BiFeO 3 interface reveals the interfacial band alignment and the characteristic quantities of the metal/ferroelectric contact. The unique combination of STM and STS in this study delivers an approach to obtain critical information on the interfacial electronic configurations of ferroelectric oxide interfaces and also their variation with ferroelectric polarization switching.

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Direct observation of ferroelectric polarization-modulated band bending at oxide interfaces

Abstract

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