Engineering nanoscale polarization at the SrTiO3/Ge interface

Tony Le; Onur Kurt; Jun Ouyang; Jianjun Wang; Long Qing Chen; Edward L. Lin; John G. Ekerdt; Yuhang Ren

doi:10.1016/j.scriptamat.2019.12.033

Engineering nanoscale polarization at the SrTiO₃/Ge interface

Tony Le
, Onur Kurt
, Jun Ouyang
, Jianjun Wang^*
, Long Qing Chen
, Edward L. Lin
, John G. Ekerdt
, Yuhang Ren

^*Bu çalışma için yazışmadan sorumlu yazar

City University of New York
Pennsylvania State University
University of Texas at Austin

Araştırma çıktısı: Dergi yayını › Makale › Hakem

2 Atıf (Scopus)

Özet

The ability to manipulate electric polarization at reduced dimension has recently generated intense research interests. Here, we report the engineering of interfacial ferroelectricity by the monolithic integration of a single crystalline SrTiO₃ (STO) film on a germanium Ge(001) substrate. A combination of nonlinear optical measurements, microstructural analyses, and phase-field simulations provide evidences of room-temperature ferroelectricity in the epitaxial STO ultrathin film. We show that the collective atomic displacements of Ti near the STO/Ge interface are responsible for the generation of an in-plane ferroelectric polarization. An a₁/a₂ domain pattern with a stable net polarization along the [110] in-plane direction is revealed.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	489-492
Sayfa sayısı	4
Dergi	Scripta Materialia
Hacim	178
DOI'lar	https://doi.org/10.1016/j.scriptamat.2019.12.033
Yayın durumu	Yayınlandı - 15 Mar 2020
Harici olarak yayınlandı	Evet

Bibliyografik not

Publisher Copyright:
© 2019

Finansman

This work was supported in part by the Air Force Office of Scientific Research (Grant Nos. FA9550-17-1-0339 and FA9550-17-1-0342 (TL, OK, JO, and YHR); Grant No. FA9550-18-1-0053 (ELL and JGE)), and the Army Research Office under grant number W911NF-17-1-0462 (JJW and LQC).

Finansörler	Finansör numarası
Air Force Office of Scientific Research	FA9550-17-1-0342, FA9550-18-1-0053, FA9550-17-1-0339
Army Research Office	W911NF-17-1-0462

Belgeye Erişim

10.1016/j.scriptamat.2019.12.033

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "Engineering nanoscale polarization at the SrTiO3/Ge interface",

abstract = "The ability to manipulate electric polarization at reduced dimension has recently generated intense research interests. Here, we report the engineering of interfacial ferroelectricity by the monolithic integration of a single crystalline SrTiO3 (STO) film on a germanium Ge(001) substrate. A combination of nonlinear optical measurements, microstructural analyses, and phase-field simulations provide evidences of room-temperature ferroelectricity in the epitaxial STO ultrathin film. We show that the collective atomic displacements of Ti near the STO/Ge interface are responsible for the generation of an in-plane ferroelectric polarization. An a1/a2 domain pattern with a stable net polarization along the [110] in-plane direction is revealed.",

keywords = "Electric polarization, Interface ferroelectricity, Nanoelectronics, Phase field simulation, Second harmonics generation",

author = "Tony Le and Onur Kurt and Jun Ouyang and Jianjun Wang and Chen, \{Long Qing\} and Lin, \{Edward L.\} and Ekerdt, \{John G.\} and Yuhang Ren",

note = "Publisher Copyright: {\textcopyright} 2019",

year = "2020",

month = mar,

day = "15",

doi = "10.1016/j.scriptamat.2019.12.033",

language = "English",

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TY - JOUR

T1 - Engineering nanoscale polarization at the SrTiO3/Ge interface

AU - Le, Tony

AU - Kurt, Onur

AU - Ouyang, Jun

AU - Wang, Jianjun

AU - Chen, Long Qing

AU - Lin, Edward L.

AU - Ekerdt, John G.

AU - Ren, Yuhang

PY - 2020/3/15

Y1 - 2020/3/15

N2 - The ability to manipulate electric polarization at reduced dimension has recently generated intense research interests. Here, we report the engineering of interfacial ferroelectricity by the monolithic integration of a single crystalline SrTiO3 (STO) film on a germanium Ge(001) substrate. A combination of nonlinear optical measurements, microstructural analyses, and phase-field simulations provide evidences of room-temperature ferroelectricity in the epitaxial STO ultrathin film. We show that the collective atomic displacements of Ti near the STO/Ge interface are responsible for the generation of an in-plane ferroelectric polarization. An a1/a2 domain pattern with a stable net polarization along the [110] in-plane direction is revealed.

AB - The ability to manipulate electric polarization at reduced dimension has recently generated intense research interests. Here, we report the engineering of interfacial ferroelectricity by the monolithic integration of a single crystalline SrTiO3 (STO) film on a germanium Ge(001) substrate. A combination of nonlinear optical measurements, microstructural analyses, and phase-field simulations provide evidences of room-temperature ferroelectricity in the epitaxial STO ultrathin film. We show that the collective atomic displacements of Ti near the STO/Ge interface are responsible for the generation of an in-plane ferroelectric polarization. An a1/a2 domain pattern with a stable net polarization along the [110] in-plane direction is revealed.

KW - Electric polarization

KW - Interface ferroelectricity

KW - Nanoelectronics

KW - Phase field simulation

KW - Second harmonics generation

UR - https://www.scopus.com/pages/publications/85077305975

U2 - 10.1016/j.scriptamat.2019.12.033

DO - 10.1016/j.scriptamat.2019.12.033

M3 - Article

AN - SCOPUS:85077305975

SN - 1359-6462

VL - 178

SP - 489

EP - 492

JO - Scripta Materialia

JF - Scripta Materialia

ER -