Atomic and electronic structures of superconducting BaFe2As2/SrTiO3 superlattices

被引：5
|
作者：
Gao, P. [1 ]
Zhang, Y. [1 ,2 ,3 ]
Zhang, S. Y. [1 ,2 ,3 ]
Lee, S. [4 ]
Weiss, J. [5 ]
Jokisaari, J. R. [1 ]
Hellstrom, E. E. [5 ]
Larbalestier, D. C. [5 ]
Eom, C. B. [4 ]
Pan, X. Q. [1 ]
机构：
[1] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA
[2] Nanjing Univ, Nat Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[3] Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China
[4] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA
[5] Florida State Univ, Natl High Magnet Field Lab, Ctr Appl Supercond, Tallahassee, FL 32310 USA
来源：
PHYSICAL REVIEW B | 2015年 / 91卷 / 10期
基金：
美国国家科学基金会;
关键词：
THIN-FILMS; MODULATION;
D O I：
10.1103/PhysRevB.91.104525
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The nanoscale structural, chemical, and electronic properties of artificial engineered superlattice thin films consisting of superconducting Co-doped BaFe2As2 (Ba-122) and nonsuperconducting SrTiO3 (STO) layers are determined by using atomically resolved scanning transmission electron microscopy and electron energy loss spectroscopy. The bonding of Ba-122/STO occurring between As (Ba) and SrO (TiO2) terminated layers has been identified. The thin STO (3 unit cell) insertion layers are a mixture of cations (Ba, Sr, Fe, and Ti) and rich in oxygen vacancies and the Ba-122 layers (10 unit cell) are free of vertical second phases. Our results explain why these superlattices show anisotropic transport response to an external magnetic field, i.e., strong ab-axis pinning (enhancing critical current density) and no c-axis pinning, which is opposite to single layer Ba-122 thin films. These findings reveal physical and chemical properties of superconducting/nonsuperconducting heterostructures and provide important insights into engineering of superconducting devices.
引用
收藏
页数：5
相关论文
共 50 条
  • [21] Effects of SrTiO2 substrates on the roughness of BaTiO3/SrTiO3 superlattices
    Zhu, AJ
    Li, CR
    Zou, KH
    Zeng, Y
    Lu, HB
    Wang, HS
    Cui, DF
    Chen, AH
    Mai, ZH
    JOURNAL OF MATERIALS SCIENCE LETTERS, 1997, 16 (23) : 1898 - 1901
  • [22] Hole doping and electronic correlations in Cr substituted BaFe2As2
    Cantarino, Marli dos Reis
    Pakuszewski, Kevin R.
    Salzmann, Bjoern
    Moya, Pedro H. A.
    Neto, Wagner R. da Silva
    Freitas, Gabriel S.
    Pagliuso, Pascoal G.
    Adriano, Cris
    Brito, Walber H.
    Garcia, Fernando A.
    SCIPOST PHYSICS, 2024, 17 (05):
  • [23] Universality of the Dispersive Spin-Resonance Mode in Superconducting BaFe2As2
    Lee, C. H.
    Steffens, P.
    Qureshi, N.
    Nakajima, M.
    Kihou, K.
    Iyo, A.
    Eisaki, H.
    Braden, M.
    PHYSICAL REVIEW LETTERS, 2013, 111 (16)
  • [24] Revealing the atomic and electronic structure of a SrTiO3/LaNiO3/SrTiO3 heterostructure interface
    Zhang, Zaoli
    Soltan, S.
    Schimd, H.
    Habermeier, H. -U.
    Keimer, B.
    Kaiser, U.
    JOURNAL OF APPLIED PHYSICS, 2014, 115 (10)
  • [25] Co-Doped BaFe2As2 Superconducting Nanowires for Detector Applications
    Pagano, Sergio
    Barone, Carlo
    Martucciello, Nadia
    Enrico, Emanuele
    Croin, Luca
    Monticone, Eugenio
    Iida, Kazumasa
    Kurth, Fritz
    IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2018, 28 (07)
  • [26] Atomic origin of Ti-deficient dislocation in SrTiO3 bicrystals and their electronic structures
    Li, Xujing
    Chen, Shulin
    Li, Mingqiang
    Liu, Kaihui
    Bai, Xuedong
    Gao, Peng
    JOURNAL OF APPLIED PHYSICS, 2019, 126 (17)
  • [27] Occurrence of a high-temperature superconducting phase in (CaCuO2)n/(SrTiO3)m superlattices
    Di Castro, D.
    Salvato, M.
    Tebano, A.
    Innocenti, D.
    Aruta, C.
    Prellier, W.
    Lebedev, O. I.
    Ottaviani, I.
    Brookes, N. B.
    Minola, M.
    Sala, M. Moretti
    Mazzoli, C.
    Medaglia, P. G.
    Ghiringhelli, G.
    Braicovich, L.
    Cirillo, M.
    Balestrino, G.
    PHYSICAL REVIEW B, 2012, 86 (13)
  • [28] Effects of spin structures on Fermi surface topologies in BaFe2As2
    Wang, Y.
    Saal, J. E.
    Shang, S. L.
    Hui, X. D.
    Chen, L. Q.
    Liu, Z. K.
    SOLID STATE COMMUNICATIONS, 2011, 151 (04) : 272 - 275
  • [29] Atomic structures of the defective SrTiO3 (001) surface
    Kubo, Toshitaka
    Orita, Hideo
    Nozoye, Hisakazu
    PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2011, 13 (37) : 16516 - 16519
  • [30] ATOMIC STRUCTURES OF REDUCED SRTIO3(001) SURFACES
    LIANG, Y
    BONNELL, DA
    SURFACE SCIENCE, 1993, 285 (03) : L510 - L516
12345