| dc.creator | Wang, JL | |
| dc.creator | Pancotti, A | |
| dc.creator | Jegou, P | |
| dc.creator | Niu, G | |
| dc.creator | Gautier, B | |
| dc.creator | Mi, YY | |
| dc.creator | Tortech, L | |
| dc.creator | Yin, S | |
| dc.creator | Vilquin, B | |
| dc.creator | Barrett, N | |
| dc.date | 2011 | |
| dc.date | 42309 | |
| dc.date | 2014-07-30T17:34:48Z | |
| dc.date | 2015-11-26T17:13:18Z | |
| dc.date | 2014-07-30T17:34:48Z | |
| dc.date | 2015-11-26T17:13:18Z | |
| dc.date.accessioned | 2018-03-29T00:01:41Z | |
| dc.date.available | 2018-03-29T00:01:41Z | |
| dc.identifier | Physical Review B. Amer Physical Soc, v. 84, n. 20, 2011. | |
| dc.identifier | 1098-0121 | |
| dc.identifier | WOS:000297105800014 | |
| dc.identifier | 10.1103/PhysRevB.84.205426 | |
| dc.identifier | http://www.repositorio.unicamp.br/jspui/handle/REPOSIP/66868 | |
| dc.identifier | http://repositorio.unicamp.br/jspui/handle/REPOSIP/66868 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1281540 | |
| dc.description | Until now, the quasiamorphous (QA) phase in BaTiO3 (BTO), SrTiO3 (STO), and BaZrO3 was achieved by pulling a thick film through a steep temperature gradient. Here, we show that a room-temperature deposited ultrathin film, subsequently annealed in O-2 can also produce a QA phase. The atomic, electronic, and ferroelectric (FE) structure of a QA, ultrathin BTO grown on STO were studied by x-ray diffraction (XRD), x-ray photoelectron diffraction (XPD), x-ray photoelectron spectroscopy (XPS), and piezoforce microscopy (PFM). The absence of long-range order is confirmed by in-and out-of-plane XRD as well as Ti 2p XPD. FE polarized domains with good retention have been successfully written into the QA film and exhibit a clear P-E hysteresis loop. Substrate clamping frustrates volume expansion during annealing leading to a QA film. Photoelectron spectroscopy confirms a similar overall electronic structure as for thicker films but with some significant differences. Simple charge-transfer arguments are not sufficient to explain the high-resolution core-level spectra. Ba, Ti, and O all show components associated with a surface region. We suggest that the observation of such a component in the Ti 2p spectrum is linked with the high dynamic charge tensor induced by the large off-center displacement of the Ti ion. | |
| dc.description | 84 | |
| dc.description | 20 | |
| dc.description | French National Research Agency (ANR) [ANR-10-BLAN-1012] | |
| dc.description | CEA | |
| dc.description | French National Research Agency (ANR) [ANR-10-BLAN-1012] | |
| dc.language | en | |
| dc.publisher | Amer Physical Soc | |
| dc.publisher | College Pk | |
| dc.publisher | EUA | |
| dc.relation | Physical Review B | |
| dc.relation | Phys. Rev. B | |
| dc.rights | aberto | |
| dc.rights | http://publish.aps.org/authors/transfer-of-copyright-agreement | |
| dc.source | Web of Science | |
| dc.subject | Soft-mode Spectroscopy | |
| dc.subject | Thin-films | |
| dc.subject | Electronic-structure | |
| dc.subject | Phase-transitions | |
| dc.subject | Amorphous Batio3 | |
| dc.subject | Srtio3 | |
| dc.subject | Surface | |
| dc.subject | Polarization | |
| dc.subject | Perovskites | |
| dc.subject | Microscopy | |
| dc.title | Ferroelectricity in a quasiamorphous ultrathin BaTiO3 film | |
| dc.type | Artículos de revistas | |
