Interplay between Structural and Thermoelectric Properties in
Epitaxial Sb2+xTe3 Alloys

J 2019

Interplay between Structural and Thermoelectric Properties in Epitaxial Sb2+xTe3 Alloys

CECCHI, S.; D. DRAGONI; D. KRIEGNER; E. TISBI; E. ZALLO et. al.

Basic information

Original name

Interplay between Structural and Thermoelectric Properties in Epitaxial Sb2+xTe3 Alloys

Authors

CECCHI, S. (380 Italy); D. DRAGONI (380 Italy); D. KRIEGNER (40 Austria); E. TISBI (380 Italy); E. ZALLO (380 Italy); F. ARCIPRETE (380 Italy); Václav HOLÝ (203 Czech Republic, guarantor, belonging to the institution); M. BERNASCONI (380 Italy) and R. CALARCO

Edition

Advanced Functional Materials, Wrinheim, Wiley-VCH Verlag, 2019, 1616-301X

Other information

Language

English

Type of outcome

Article in a journal

Field of Study

10302 Condensed matter physics

Country of publisher

Germany

Confidentiality degree

is not subject to a state or trade secret

References:

URL

Impact factor

Impact factor: 16.836

RIV identification code

RIV/00216224:14310/19:00109221

Organization unit

Faculty of Science

DOI

https://doi.org/10.1002/adfm.201805184

UT WoS

000455097900017

EID Scopus

2-s2.0-85056770003

Keywords in English

molecular beam epitaxy; phase change materials; strain engineering; thermoelectric materials; van der Waals

Abstract

In the original language

In recent years strain engineering is proposed in chalcogenide superlattices (SLs) to shape in particular the switching functionality for phase change memory applications. This is possible in Sb2Te3/GeTe heterostructures leveraging on the peculiar behavior of Sb2Te3, in between covalently bonded and weakly bonded materials. In the present study, the structural and thermoelectric (TE) properties of epitaxial Sb2+xTe3 films are shown, as they represent an intriguing option to expand the horizon of strain engineering in such SLs. Samples with composition between Sb2Te3 and Sb4Te3 are prepared by molecular beam epitaxy. A combination of X-ray diffraction and Raman spectroscopy, together with dedicated simulations, allows unveiling the structural characteristics of the alloys. A consistent evaluation of the structural disorder characterizing the material is drawn as well as the presence of both Sb-2 and Sb-4 slabs is detected. A strong link exists among structural and TE properties, the latter having implications also in phase change SLs. A further improvement of the TE performances may be achieved by accurately engineering the intrinsic disorder. The possibility to tune the strain in designed Sb2+xTe3/GeTe SLs by controlling at the nanoscale the 2D character of the Sb2+xTe3 alloys is envisioned.

Cite

CECCHI, S.; D. DRAGONI; D. KRIEGNER; E. TISBI; E. ZALLO; F. ARCIPRETE; Václav HOLÝ; M. BERNASCONI and R. CALARCO. Interplay between Structural and Thermoelectric Properties in Epitaxial Sb2+xTe3 Alloys. Advanced Functional Materials. Wrinheim: Wiley-VCH Verlag, 2019, vol. 29, No 2, p. 1805184-1805193. ISSN 1616-301X. Available from: https://doi.org/10.1002/adfm.201805184.

@article{1502167,
   author = {Cecchi, S. and Dragoni, D. and Kriegner, D. and Tisbi, E. and Zallo, E. and Arciprete, F. and Holý, Václav and Bernasconi, M. and Calarco, R.},
   article_location = {Wrinheim},
   article_number = {2},
   doi = {https://doi.org/10.1002/adfm.201805184},
   keywords = {molecular beam epitaxy; phase change materials; strain engineering; thermoelectric materials; van der Waals},
   language = {eng},
   issn = {1616-301X},
   journal = {Advanced Functional Materials},
   title = {Interplay between Structural and Thermoelectric Properties in Epitaxial Sb2+xTe3 Alloys},
   url = {http://dx.doi.org/10.1002/adfm.201805184},
   volume = {29},
   year = {2019}
}

TY  - JOUR
ID  - 1502167
AU  - Cecchi, S. - Dragoni, D. - Kriegner, D. - Tisbi, E. - Zallo, E. - Arciprete, F. - Holý, Václav - Bernasconi, M. - Calarco, R.
PY  - 2019
TI  - Interplay between Structural and Thermoelectric Properties in Epitaxial Sb2+xTe3 Alloys
JF  - Advanced Functional Materials
VL  - 29
IS  - 2
SP  - 1805184
EP  - 1805184
PB  - Wiley-VCH Verlag
SN  - 1616301X
KW  - molecular beam epitaxy
KW  - phase change materials
KW  - strain engineering
KW  - thermoelectric materials
KW  - van der Waals
UR  - http://dx.doi.org/10.1002/adfm.201805184
L2  - http://dx.doi.org/10.1002/adfm.201805184
N2  - In recent years strain engineering is proposed in chalcogenide superlattices (SLs) to shape in particular the switching functionality for phase change memory applications. This is possible in Sb2Te3/GeTe heterostructures leveraging on the peculiar behavior of Sb2Te3, in between covalently bonded and weakly bonded materials. In the present study, the structural and thermoelectric (TE) properties of epitaxial Sb2+xTe3 films are shown, as they represent an intriguing option to expand the horizon of strain engineering in such SLs. Samples with composition between Sb2Te3 and Sb4Te3 are prepared by molecular beam epitaxy. A combination of X-ray diffraction and Raman spectroscopy, together with dedicated simulations, allows unveiling the structural characteristics of the alloys. A consistent evaluation of the structural disorder characterizing the material is drawn as well as the presence of both Sb-2 and Sb-4 slabs is detected. A strong link exists among structural and TE properties, the latter having implications also in phase change SLs. A further improvement of the TE performances may be achieved by accurately engineering the intrinsic disorder. The possibility to tune the strain in designed Sb2+xTe3/GeTe SLs by controlling at the nanoscale the 2D character of the Sb2+xTe3 alloys is envisioned.
ER  -

CECCHI, S.; D. DRAGONI; D. KRIEGNER; E. TISBI; E. ZALLO; F. ARCIPRETE; Václav HOLÝ; M. BERNASCONI and R. CALARCO. Interplay between Structural and Thermoelectric Properties in Epitaxial Sb2+xTe3 Alloys. \textit{Advanced Functional Materials}. Wrinheim: Wiley-VCH Verlag, 2019, vol.~29, No~2, p.~1805184-1805193. ISSN~1616-301X. Available from: https://doi.org/10.1002/adfm.201805184.

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