Browse > Article
http://dx.doi.org/10.9714/psac.2018.20.1.028

Effect of chemical doping on heterostructured Fe-based superconductor Sr2VO3FeAs  

Ok, Jong Mok (Department of Physics, Pohang University of Science and Technology)
Na, Se Woong (Department of Physics, Pohang University of Science and Technology)
Kim, Jun Sung (Department of Physics, Pohang University of Science and Technology)
Publication Information
Progress in Superconductivity and Cryogenics / v.20, no.1, 2018 , pp. 28-31 More about this Journal
Abstract
Phase diagrams of electron- and hole-doped $Sr_2VO_3FeAs$ are investigated using Co and Mn substitution at Fe site. Metallic nature survives only for Co (electron) doping, not for Mn (hole) doping. The conductivity of $Sr_2VO_3(Fe,M)As$ (M=Mn,Co) is sensitive to the structural modification of FeAs microstructure rather than carrier doping. This finding implies that the FeAs layer plays a dominant role on the charge conduction, thus the $SrVO_3$ layers should be considered as an insulating block. Also, we found that the superconductivity is rapidly suppressed by both dopants. This result is different from the conventional behavior that superconductivity is induced by doping in the most of Fe pnictides. Our finding strongly supports the uniqueness of $Sr_2VO_3FeAs$ among the Fe pnictide superconductors.
Keywords
Fe based superconductor; chemical doping; $Sr_2VO_3FeAs$;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Y. Kamihara, T. Watanabe, M. Hirano, and H. Hosono, "Iron-based layered superconductor La[$O_{1-x}F_x$]FeAs (x = 0.05-0.12) with $T_C$=26 K," J. Am. Chem. Soc., vol.130, pp. 3296-3297, 2008.   DOI
2 J. H. Tapp, Z. Tang, B. Lv, K. Sasmal, B. Lorenz, P. C. W. Chu, and A. M. Guloy, "LiFeAs: an intrinsic FeAs-based superconductor with $T_C$ = 18 K," Phys. Rev. B., vol. 78, pp. 060505(R), 2008.   DOI
3 M. Rotter, M. Tegal, and D. Johrendt, "Superconductivity at 38 K in the iron arsenide ($Ba_{1-x}K_x$)$Fe_2As_2$," Phys. Rev. Lett., vol. 101, pp. 107006, 2008.   DOI
4 A. S. Sefat, R. Jin, M. A. McGuire, B. C. Sales, D. J. Singh, and D. Mandrus, "Superconductivity at 22 K in Co-doped $BaFe_2As_2$," Phys. Rev. Lett., vol. 101, pp. 117004, 2008.   DOI
5 X. H. Chen, T. Wu, G. Wu, R. H. Liu, H. Chen, and D. F. Fang, "Superconductivity at 43 K in $SmFeAsO_{1-x}F_x$," Nature, vol. 453, pp. 761, 2008.   DOI
6 H. H. Wen, G. Mu, L. Fang, H. Yang, and X. Zhu, "Superconductivity at 25 K in hole doped ($La_{1-x}Sr_x$)OFeAs," Europhys. Lett., vol. 82, pp. 17009, 2008.   DOI
7 X. Zhu, F. Han, G. Mu, P. Cheng, B. Shen, B. Zeng, and H. H. Wen, "Transition of stoichiometric $Sr_2VO_3FeAs$ to a superconducting state at 37.2 K," Phys. Rev. B., vol. 79, pp. 220512(R), 2008.
8 J. M. Ok, S. -H. Baek, C. Hoch, R. K. Kremer, S. Y. Park, S. Ji, B. Buchner, J. -H. Park, S. I. Hyun, J. H. Shim, Y. Bang, E. G. Moon, I. I. Mazin and J. S. Kim, "Frustration-driven $C_4$ symmetric order in a naturally-heteroctructured superconductor $Sr_2VO_3FeAs$," Nat. Commun. vol. 8, pp. 2167, 2017.   DOI
9 M. R. Norman, "High-temperature superconductivity in the iron pnictide," Physics, vol. 1, pp. 21, 2008.   DOI
10 S. Choi, S. Johnston, W.-J. Jang, K. Koepernik, K. Nakatsukasa, J. M. Ok, H.-J. Lee, H. W. Choi, A. T. Lee, A. Akbari, Y. K. Semertzidis, Y. Bang, J. S. Kim, and J. Lee, "Correlation of Fe-Based Superconductivity and Electron-Phonon Coupling in an FeAs/Oxide Heterostructure," Phys. Rev. Lett., vol. 119, pp. 107003, 2017.   DOI
11 T. Qian, N. Xu, Y.-B. Shi, K. Nakayama, P. Richard, T. Kawahara, T. Sato, T. Takahashi, M. Neupane, Y.-M. Xu, X.-P. Wang, G. Xu, X. Dai, Z. Fang, P. Cheng, H.-H. Wen, and H. Ding, "Quasinested Fe orbitals versus Mott-insulating V orbitals in superconducting $Sr_2VFeAsO_3$ as seen from angle-resolved photoemission," Phys. Rev. B., vol. 83, pp. 140513(R), 2011   DOI
12 D. Johrendt, H. Hosono, R.-D. Hoffmann and Rottgen. "Structural chemistry of superconducting pnictides and pnictide oxides with layered structures," Z. Kristallogr, vol. 226, pp. 435-446, 2011.
13 M.Tegel, T. Schmid, T. Sturzer, M. Egawa, Y. Su, A. Senyshyn, and D. Johrendt, "Possible magnetic order and suppression of superconductivity by V doping in Sr2VO3FeAs," Phys. Rev. B., vol. 82, pp. 140507(R), 2010   DOI
14 J. S. Kim, S. Khim, H. J. Kim, M. J. Eom, J. M. Law, R. K. Kremer, J. H. Shim and K. H. Kim, "Electron-hole asymmetry in Co- and Mn-doped $SrFe_2As_2$," Phys. Rev. B., vol. 82, pp. 024510, 2010.   DOI
15 Y. K. Kim, Y. Y. Koh, W. S. Kyung, G. R. Han, B. Lee, Kee Hoon Kim, J. M. Ok, Jun Sung Kim, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, S.-K. Mo, and C. Kim, "Possible role of bonding angle and orbital mixing in iron pnictide superconductivity: Comparative electronic structure studies of LiFeAs and $Sr_2VO_3FeAs$," Phys. Rev. B., vol. 92, pp. 041116(R), 2015   DOI
16 C. -H. Lee, A. Iyo, H. Eisaki, H. Kito, M. T. Fernandez-Diaz, T. Ito, K. Kihou, H. Matsuhata, M. Braden, and K. Yamada, "Effect of Structural Parameters on Superconductivity in Fluorine-Free $LnFeAsO_{1-y}$ (Ln = La, Nd)," J. Phys. Soc. Jpn., vol. 77, pp. 083704, 2008.   DOI