journal article·2019-07-01Open access

Confined polaronic transport in (LaFeO3)n/(SrFeO3)1 superlattices

Seo Hyoung Chang, Seong Keun Kim, Young-Min Kim, Yongqi Dong, Chad M. Folkman, Da Woon Jeong, Woo Seok Choi, Albina Y. Borisevich, Jeffrey A. Eastman, Anand Bhattacharya, Dillon D. Fong

APL Materials· Volume 7· Issue 7

Abstract

Functional oxide superlattices offer new and exciting possibilities for the exploration of emergent properties at the nanoscale. While the behavior of La1−xSrxFeO3 films has been extensively investigated at low temperatures, few studies have been carried out at high temperatures, particularly for LaFeO3/SrFeO3 superlattice systems. Here, we investigate the transport behavior and optical properties of (LaFeO3)n/(SrFeO3)1 superlattices at 373 K and above. Using optical spectroscopy, we observe a low energy excitation at ∼1 eV, attributable to charge transfer between the O 2p and Fe 3d states of the δ-doped single SrFeO3 layer. From in-plane conductivity measurements on the superlattices, we determine activation energies that are much lower than those of alloyed samples and vary with the total number of SrFeO3 layers. This suggests that polaronic transport is confined near the SrFeO3 regions, permitting mobilities significantly enhanced over those in alloyed thin films.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Electronic and Structural Properties of Oxides · Magnetic and transport properties of perovskites and related materials · Multiferroics and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Materials Science Division, Argonne National Laboratory 1 , Argonne, Illinois 60439, USA

Department of Physics, Chung-Ang University 2 , Seoul 06974, South Korea

Center for Electronic Materials, Korea Institute of Science and Technology 3 , Seoul 02792, South Korea

Materials Science and Technology Division, Oak Ridge National Laboratory 4 , Oak Ridge, Tennessee 37831, USA

Department of Energy Science, Sungkyunkwan University 5 , Suwon 16419, South Korea

National Synchrotron Radiation Laboratory, University of Science and Technology of China 6 , Hefei, Anhui 230026, China

Department of Physics and Astronomy, Seoul National University 7 , Seoul 08826, South Korea

Department of Physics, Sungkyunkwan University 8 , Suwon 16419, South Korea

Funding

Chung-Ang University · U.S. Department of Energy

References (45)

Show source-provided references
1. 2001 · 17
2. J. Electron Spectrosc. Relat. Phenom. · 2005 · 144-147 · 87710.1016/j.elspec.2005.01.166 ↗
3. Phys. Rev. B · 2006 · 74 · 11511410.1103/physrevb.74.115114 ↗
4. J. Solid State Chem. · 1985 · 58 · 25710.1016/0022-4596(85)90243-9 ↗
5. J. Electroceram. · 2005 · 14 · 19310.1007/s10832-005-0957-4 ↗
6. Solid State Ionics · 2004 · 173 · 2310.1016/j.ssi.2004.07.047 ↗
7. J. Solid State Chem. · 2005 · 178 · 92110.1016/j.jssc.2004.10.038 ↗
8. J. Solid State Chem. · 2003 · 172 · 21910.1016/s0022-4596(03)00040-9 ↗
9. J. Solid State Electrochem. · 2004 · 8 · 57810.1007/s10008-003-0486-5 ↗
10. J. Solid State Chem. · 2007 · 180 · 148910.1016/j.jssc.2007.02.012 ↗
11. Top. Catal. · 2011 · 54 · 100910.1007/s11244-011-9712-z ↗
12. Appl. Phys. Lett. · 2008 · 93 · 26210310.1063/1.3049614 ↗
13. Appl. Phys. Lett. · 2009 · 95 · 02210710.1063/1.3174916 ↗
14. Appl. Phys. Lett. · 2011 · 99 · 20211210.1063/1.3662970 ↗
15. Appl. Phys. Lett. · 2013 · 102 · 08190410.1063/1.4794145 ↗
16. Nature · 2002 · 419 · 37810.1038/nature00977 ↗
17. Appl. Phys. Lett. · 2007 · 90 · 22250310.1063/1.2745205 ↗
18. Nat. Mater. · 2009 · 8 · 89210.1038/nmat2557 ↗
19. Sci. Rep. · 2013 · 3 · 328410.1038/srep03284 ↗
20. Phys. Rev. Lett. · 2010 · 104 · 09760110.1103/physrevlett.104.097601 ↗
21. Adv. Mater. · 2011 · 23 · 336310.1002/adma.201101152 ↗
22. Adv. Mater. · 2012 · 24 · 196110.1002/adma.201104674 ↗
23. J. Mater. Chem. · 2010 · 20 · 379910.1039/b922430k ↗
24. Nat. Mater. · 2013 · 13 · 16810.1038/nmat3826 ↗
25. Physica B · 2001 · 299 · 12010.1016/s0921-4526(00)00590-1 ↗
26. Phys. Rev. B · 1992 · 46 · 451110.1103/physrevb.46.4511 ↗
27. Phys. Rev. B · 2006 · 73 · 09445110.1103/physrevb.73.094451 ↗
28. Phys. Rev. B · 2011 · 84 · 05442710.1103/physrevb.84.054427 ↗
29. Appl. Phys. Lett. · 1998 · 73 · 292010.1063/1.122630 ↗
30. Phys. Rev. B · 2011 · 84 · 11513210.1103/physrevb.84.115132 ↗
31. J. Am. Ceram. Soc. · 2004 · 87 · 195210.1111/j.1151-2916.2004.tb06346.x ↗
32. Appl. Phys. Lett. · 2014 · 105 · 06211010.1063/1.4893139 ↗
33. Appl. Phys. Lett. · 2008 · 92 · 14290810.1063/1.2901160 ↗
34. Phys. Rev. Mater. · 2019 · 3 · 02540110.1103/physrevmaterials.3.025401 ↗
35. Phys. Rev. B · 1993 · 48 · 1700610.1103/physrevb.48.17006 ↗
36. Phys. Rev. B · 2005 · 71 · 03510810.1103/physrevb.71.035108 ↗
37. Phys. Rev. Lett. · 2004 · 93 · 14720410.1103/physrevlett.93.147204 ↗
38. Phys. Rev. B · 2013 · 87 · 20510210.1103/physrevb.87.205102 ↗
39. Adv. Mater. · 2017 · 29 · 160656610.1002/adma.201606566 ↗
40. J. Solid State Chem. · 1990 · 84 · 13810.1016/0022-4596(90)90192-z ↗
41. Adv. Phys. · 1969 · 18 · 4110.1080/00018736900101267 ↗
42. J. Appl. Phys. · 2014 · 115 · 23370410.1063/1.4883541 ↗
43. Curr. Appl. Phys. · 2010 · 10 · 86610.1016/j.cap.2009.10.009 ↗
44. J. Mater. Chem. A · 2017 · 5 · 449310.1039/c6ta10357j ↗
45. Chem. Mater. · 2006 · 18 · 365110.1021/cm052803x ↗