Universal Ti-rich termination of atomically flat SrTiO3 (001), (110), and (111) surfaces

被引：111

作者：

Biswas, A. ^{[3
]}

Rossen, P. B. ^{[4
]}

Yang, C. -H. ^{[1
,2
]}

Siemons, W. ^{[5
]}

Jung, M. -H. ^{[3
]}

Yang, I. K. ^{[3
]}

Ramesh, R. ^{[4
,5
,6
]}

Jeong, Y. H. ^{[3
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South Korea

[2] Korea Adv Inst Sci & Technol, Inst NanoCentury, Taejon 305701, South Korea

[3] Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea

[4] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

[5] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[6] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 05期

关键词：

CRYSTAL-SURFACES;

D O I：

10.1063/1.3549860

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied the surface termination of atomically flat SrTiO3 surfaces treated by chemical etching and subsequent thermal annealing, for all commercially available orientations (001), (110), and (111). Atomic force microscopy confirms that our treatment processes produce unit cell steps with flat terrace structures. We have also determined the topmost atomic layer of SrTiO3 surfaces through time-of-flight mass spectroscopy. We found that all three orientations exhibit a Ti-rich surface. Our observation opens doors for interface engineering along the (110) and (111) directions in addition to a well known [100] case, which widens the range of functional heterostructures and interfaces. (c) 2011 American Institute of Physics. [doi: 10.1063/1.3549860]

引用

页数：3

共 20 条

[1]

Auciello O, 1998, ANNU REV MATER SCI, V28, pXI

[2] Atomically flat SrO-terminated SrTiO3(001) substrate [J].

Bachelet, R. ;

Sanchez, F. ;

Palomares, F. J. ;

Ocal, C. ;

Fontcuberta, J. .

APPLIED PHYSICS LETTERS, 2009, 95 (14)

[3] Ab initio prediction of a multiferroic with large polarization and magnetization -: art. no. 012505 [J].

Baettig, P ;

Spaldin, NA .

APPLIED PHYSICS LETTERS, 2005, 86 (01) :012505-1

[4] Stability and electronic structure of the (1X1) SrTiO3 (110) polar surfaces by first-principles calculations -: art. no. 035418 [J].

Bottin, F ;

Finocchi, F ;

Noguera, C .

PHYSICAL REVIEW B, 2003, 68 (03)

[5] Atomically flat single-terminated SrTiO3 (111) surface [J].

Chang, Jaewan ;

Park, Yoon-Seok ;

Kim, Sang-Koog .

APPLIED PHYSICS LETTERS, 2008, 92 (15)

[6] First-principles calculations of atomic and electronic structure of SrTiO3 (001) and (011) surfaces [J].

Eglitis, R. I. ;

Vanderbilt, David .

PHYSICAL REVIEW B, 2008, 77 (19)

[7]

Enterkin JA, 2010, NAT MATER, V9, P245, DOI [10.1038/NMAT2636, 10.1038/nmat2636]

[8] The structure and chemistry of the TiO2-rich surface of SrTiO3(001) [J].

Erdman, N ;

Poeppelmeier, KR ;

Asta, M ;

Warschkow, O ;

Ellis, DE ;

Marks, LD .

NATURE, 2002, 419 (6902) :55-58

[9] Ab initio calculations of the SrTiO3 (110) polar surface -: art. no. 035408 [J].

Heifets, E ;

Goddard, WA ;

Kotomin, EA ;

Eglitis, RI ;

Borstel, G .

PHYSICAL REVIEW B, 2004, 69 (03)

[10] Surface of strontium titanate [J].

Herger, R. ;

Willmott, P. R. ;

Bunk, O. ;

Schlepuetz, C. M. ;

Patterson, B. D. ;

Delley, B. .

PHYSICAL REVIEW LETTERS, 2007, 98 (07)

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