Engineering of Fe-pnictide heterointerfaces by electrostatic principles
Source abstract
Abstract
Abstract Interface-related phenomena have great potential to control the superconducting state in Fe-based superconductors. We propose a comprehensive classification of Fe-pnictide heterointerfaces based on electrostatic principles that allow the prediction of the interface microstructure, in particular, distinguishing between clean heterointerfaces and the formation of interfacial layers. The concept was successfully tested on a novel LnOFeAs/BaFe2As2 (Ln = La, Sm) Fe-pnictide heterostructure. With the addition of different cations/anions, it is possible to produce clean interfaces or interfacial layers. The impact of the microstructure on superconductivity in the Fe-pnictide heterostructures is discussed.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Iron-based superconductors research · Intellectual Capital and Performance Analysis · Corporate Taxation and Avoidance
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
Show source-provided references
1. Wang, Q.-Y. et al. Interface-induced high-temperature superconductivity in single unit-cell FeSe films on SrTiO3. Phys. Lett. 29, 037402 (2012).
2. He, S. et al. Phase diagram and electronic indication of high-temperature superconductivity at 65 K in single-layer FeSe films. Nat. Mater. 12, 605–610 (2013).10.1038/nmat3648 ↗
3. Tan, S. et al. Interface-induced superconductivity and strain-dependent spin density waves in FeSe/SrTiO3. Nat. Mater. 12, 634–640 (2013).10.1038/nmat3654 ↗
4. Lee, D.-H. Routes to high-temperature superconductivity: a lesson from FeSe/SrTiO3. Annu. Rev. Condens. Matter Phys. 9, 261–282 (2018).10.1146/annurev-conmatphys-033117-053942 ↗
5. Huang, D. & Hoffman, J. Monolayer FeSe on SrTiO3. Annu. Rev. Condens. Matter Phys. 8, 311–336 (2017).10.1146/annurev-conmatphys-031016-025242 ↗
6. Haindl, S., Kinjo, H., Hanzawa, K., Hiramatsu, H. & Hosono, H. Pulsed laser deposition of SmFeAsO1-δ on MgO(100) substrates. Appl. Surf. Sci. 437, 418–428 (2018).10.1016/j.apsusc.2017.08.061 ↗
7. Haindl, S., Sato, M., Wurmehl, S., Büchner, B. & Kampert, E. Pulsed laser deposition of Fe-oxypnictides: Co- and F-substitution. Supercond. Sci. Technol. 33, 105004 (2020).10.1088/1361-6668/ababea ↗
8. MacLaren, I., Nord, M., Jiao, C. & Yücelen, E. Liftout of high-quality thin sections of a perovskite oxide thin film using a xenon plasma focused ion beam microscope. Microsc. Microanal. 25, 115–118 (2019).10.1017/S1431927618016239 ↗
9. Rauch, E. F. et al. Automated nanocrystal orientation and phase mapping in the transmission electron microscope on the basis of precession electron diffraction. Z. Kristallogr. 225, 103–109 (2010).10.1524/zkri.2010.1205 ↗
10. MacLaren, I. et al. A comparison of a direct electron detector and a high speed video camera for scanning precession electron diffraction phase and orientation mapping. Microsc. Microanal. 26, 1110–1116 (2020).10.1017/S1431927620024411 ↗
11. Paterson, G. W. et al. Fast pixelated detectors in scanning transmission electron microscopy. Part II: post acquisition data processing, visualisation, and structural characterisation. Microsc. Microanal. 26, 944 (2020).10.1017/S1431927620024307 ↗
12. Perdew, J. P., Burke, K. & Ernzerhof, M. Generalized gradient approximation made simple. Phys. Rev. Lett. 77, 3865–3868 (1996).10.1103/PhysRevLett.77.3865 ↗
13. Kresse, G. & Joubert, D. From ultrasoft pseudopotentials to the projector augmented-wave method. Phys. Rev. B 59, 1758–1775 (1999).10.1103/PhysRevB.59.1758 ↗
14. Kresse, G. & Furthmüller, J. Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set. Phys. Rev. B 54, 11169–11186 (1996).10.1103/PhysRevB.54.11169 ↗
15. Database codes ICSD 169555. ICSD provided by FIZ Karlsruhe – (Leibniz Institute for Information Infrastructure, 2020).
16. Monkhorst, H. J. & Pack, J. D. Special points for Brillouin-zone integrations. Phys. Rev. B 13, 5188–5192 (1976).10.1103/PhysRevB.13.5188 ↗
17. Haindl, S. et al. Thin film growth of Fe-based superconductors: from fundamental properties to functional devices. A comparative review. Rep. Prog. Phys. 77, 046502 (2014).10.1088/0034-4885/77/4/046502 ↗
18. Thersleff, T. et al. Coherent interfacial bonding on the FeAs tetrahedron in Fe/Ba(Fe1-xCox)2As2 bilayers. Appl. Phys. Lett. 97, 022506 (2010).10.1063/1.3457432 ↗
19. Engelmann, J. et al. Fe/Ba(Fe1-xCox)2As2 multilayers and quasi-multilayers with Tc = 29 K. Phys. C. 494, 185–188 (2013).10.1016/j.physc.2013.04.014 ↗
20. Lee, S. Artificially engineered superlattices of pnictide superconductors. Nat. Mater. 12, 392–396 (2013).10.1038/nmat3575 ↗
21. Gao, P. et al. Atomic and electronic structures of superconducting BaFe2As2/SrTiO3 superlattices. Phys. Rev. B 91, 104525 (2015).10.1103/PhysRevB.91.104525 ↗
22. Kang, J.-H. et al. Control of epitaxial BaFe2As2 atomic configurations with substrate surface terminations. Nano Lett. 18, 6347–6352 (2018).10.1021/acs.nanolett.8b02704 ↗
23. Kang, J. H. et al. Superconductivity in undoped BaFe2As2 by tetrahedral geometry design. Proc. Natl Acad. Sci. USA 117, 21170–21174 (2020).10.1073/pnas.2001123117 ↗
24. Tarantini, C. et al. Artificial and self-assembled vortex-pinning centers in superconducting Ba(Fe1-xCox)2As2 thin films as a route to obtaining very high critical-current densities. Phys. Rev. B 86, 214504 (2012).10.1103/PhysRevB.86.214504 ↗
25. Oh, M. J. et al. Vortex pinning in artificially layered Ba(Fe,Co)2As2 film. Cryogenics 92, 1–4 (2018).10.1016/j.cryogenics.2018.03.006 ↗
26. Harrison, W. A., Kraut, E. A., Waldrop, J. R. & Grant, R. W. Polar heterojunction interfaces. Phys. Rev. B 18, 4402–4410 (1978).10.1103/PhysRevB.18.4402 ↗
27. Hong, S., Nakhmanson, S. M. & Fong, D. D. Screening mechanisms at polar oxide heterointerfaces. Rep. Prog. Phys. 79, 076501 (2016).10.1088/0034-4885/79/7/076501 ↗
28. Noguera, C. Polar oxide surfaces. J. Phys. Condens. Matter 12, R367–R410 (2000).10.1088/0953-8984/12/31/201 ↗
29. Tasker, P. W. The stability of ionic crystal surfaces. J. Phys. C Solid State Phys. 12, 4977–4984 (1979).10.1088/0022-3719/12/22/036 ↗
30. Ohtomo, A., Hwang, H. Y. & High-Mobility, A. Electron gas at the LaAlO3/SrTiO3 heterointerface. Nature 427, 423–426 (2004).10.1038/nature02308 ↗
31. Kim, S. et al. Surface reconstruction and charge modulation in BaFe2As2 superconducting film. J. Phys. Condens. Matter 30, 315001 (2018).10.1088/1361-648X/aacd85 ↗
32. Kyung, W. S. et al. Enhanced superconductivity in surface-electron-doped iron pnictide Ba(Fe1.94Co0.06)2As2. Nat. Mater. 15, 1233–1236 (2016).10.1038/nmat4728 ↗
33. Haindl, S., Hanzawa, K., Sato, H., Hiramatsu, H. & Hosono, H. In-situ growth of superconducting SmO1-xFxFeAs thin films by pulsed laser deposition. Sci. Rep. 6, 35797 (2016).10.1038/srep35797 ↗
34. Katase, T., Iimura, S., Hiramatsu, H., Kamiya, T. & Hosono, H. Identical effects of indirect and direct electron doping of superconducting BaFe2As2 thin films. Phys. Rev. B 85, 140516R (2012).10.1103/PhysRevB.85.140516 ↗
35. Ophus, C. Four-dimensional scanning transmission electron microscopy (4D-STEM): from scanning nanodiffraction to ptychography and beyond. Microsc. Microanal. 25, 563–582 (2019).10.1017/S1431927619000497 ↗
36. Iida, K. et al. Scaling behavior of the critical current in clean epitaxial Ba(Fe1-xCox)2As2 thin films. Phys. Rev. B 81, 100507R (2010).10.1103/PhysRevB.81.100507 ↗
37. The absence of a doping effect in this heterostructure may indicate that interdiffusion at the interface is suppressed.
38. Wang et al. Effects of cobalt doping and phase diagrams of LFe1-xCoxAsO (L = La, Sm). Phys. Rev. B 79, 054521 (2009).10.1103/PhysRevB.79.054521 ↗
39. Tinkham, M. Effects of fluxoid quantization on transitions of superconducting films. Phys. Rev. 129, 2413–2422 (1967).10.1103/PhysRev.129.2413 ↗