Selective growth of a MgO(100)-c(2×2) superstructure on a SrTiO3(100)-(2×2) substrate

Møller, Preben J.; Komolov, S. A.; Lazneva, E. F.

doi:10.1016/s0039-6028(99)00018-7

Cited by 34 publications

(18 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar to many other perovskite metal oxides, SrTiO 3 commonly reconstructs; the plethora of reconstructions identified include (2×1), (2×2), (4×4), c(4×2), c(4×4), c(6×2), (√5×√5)-R26.6°, and (√13×√13)-R33.7° structures. [16,18,20,24,26,[30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46] Which reconstruction, or combination of reconstructions, is encountered in any given case depends crucially on details of the surface preparation procedure. [18,19,41,43,44,47,48] An understanding and characterization of these surface states -and the procedures that lead to them -is nevertheless important as they affect the properties of any SrTiO 3 /thin film interface grown on them.…”

Section: Introductionmentioning

confidence: 99%

Surface phase, morphology, and charge distribution transitions on vacuum and ambient annealedSrTiO3(100)

et al. 2016

View full text Add to dashboard Cite

The surface structures of SrTiO 3 (100) single crystals were examined as a function of annealing time and temperature in either oxygen atmosphere or ultra-high vacuum (UHV) using noncontact atomic force microscopy (NC-AFM), Auger electron spectroscopy (AES), and low-energy electron diffraction (LEED). Samples were subsequently analyzed for the effect the modulation of their charge distribution had on their surface potential. It was found that the evolution of the SrTiO 3 surface roughness, stoichiometry, and reconstruction depends on the preparation scheme. Surface roughness evolved non-monotonically with UHV annealing temperature, which is explained by electrostatic modulations of the surface potential caused by increasing oxygen depletion. This was further corroborated by experiments in which the apparent roughness tracked in NC-AFM could be correlated with changes in the surface charge distribution that were controlled by applying a bias voltage to the sample. Based on these findings, it is suggested that careful selection of preparation procedures combined with application of an electric field may be used to tune the properties of thin films grown on SrTiO 3 .

show abstract

Section: Introductionmentioning

confidence: 99%

Surface phase, morphology, and charge distribution transitions on vacuum and ambient annealedSrTiO3(100)

et al. 2016

View full text Add to dashboard Cite

show abstract

“…SrTiO 3 is also a candidate for a crystalline gate dielectric in silicon based devices [4,5] and is used as an interface layer to allow GaAs to be grown on Si [6]. Despite extensive research into the surface properties of SrTiO 3 (0 0 1) there remain many open questions regarding surface terminations, ferroelectric properties [7,8], and reconstructions [9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Nanostructures on the SrTiO3() surface studied by STM

2002

View full text Add to dashboard Cite

Atomic resolution scanning tunnelling microscopy of the SrTiO 3 (0 0 1) surface reveals that certain treatments give rise to two types of self-assembled nanostructures. Surfaces prepared through Ar ion sputtering and ultrahigh vacuum (UHV) annealing up to 900°C form terraces with straight step edges that have a c(4 Â 2) reconstruction. Following further UHV annealing above 900°C nanolines of 1 nm width, 0.2 nm height, and variable length are created that run in h1 0 0i directions. On closest packing the nanolines are 2.4 nm apart and form a (6 Â 2) overlayer. On further annealing the nanolines break up into nanodots of 0.2 nm height that form regular arrays. It is proposed that both structure types are created through non-stoichiometry of the surface region that results in nanocrystalline growth of either SrO or TiO x . SrTiO 3 surfaces patterned in this way have the potential to serve as a template for the growth of metallic or semiconducting quantum structures.

show abstract

“…A bewildering large number of different reconstructions have been experimentally observed on the SrTiO 3 surface including a series of (n×n) reconstructions on the (111) surface [1], (n×1) and (1×n) reconstructions on the (110) surface [2] and an even larger number for the (001), namely, the (1×1) [3][4][5][6][7][8][9][10], (2×1) [4,8,9,[11][12][13], (2×2) [8][9][10][14][15][16], c(4×2) [11,14,17,18], c(4×4) [4,8,16], (4×4) [16], c(6×2) [11,12,[17][18][19], (6×2) [18], (√5×√5)R26.6º [16,[20][21][22][23], (√13×√13)R33.7º [12,16] (RT13 hereafter) plus many more [24] which may only be locally stable such as a (4√2×√2)R45º.…”

mentioning

confidence: 99%