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Title: Spin polarized current injection through HgBr2 intercalated Bi2212 intrinsic josephson junctions
Authors: Özyüzer, Lütfi
Kurter, Cihan
Özdemir, Mustafa
Zasadzinski, John F.
Gray, Kenneth E.
Hinks, David G.
Keywords: Electron injection
High-Tc superconductors
Intrinsic Josephson junctions
Spin polarized current
Tunneling spectroscopy
Issue Date: Jun-2007
Publisher: Institute of Electrical and Electronics Engineers Inc.
Source: Özyüzer, L., Kurter, C., Özdemir, M., Zasadzinski, J. F., Gray, K. E., and Hinks, D. G. (2007). Spin polarized current injection through HgBr2 intercalated Bi2212 intrinsic josephson junctions. IEEE Transactions on Applied Superconductivity, 17(2), 577-580. doi:10.1109/TASC.2007.898651
Abstract: To investigate the effect of polarized current on tunneling characteristics of intrinsic Josephson junctions (IJJs), spin-polarized and spin-degenerate current have been injected through the c-axis of HgBr2 intercalated Bi2.1Sr1.5Ca1.4Cu2O 8+δ (Bi2212) single crystals on which 10 × 10 μm 2 mesas have been fabricated. These two spin conditions are achieved by depositing either Au (15 nm)/Co (80 nm)/Au (156 nm) multilayers or single Au film on HgBr2 intercalated Bi2212 with Tc = 74 K followed by photolithography and Ar ion beam etching. The I-V characteristics have been measured with and without a magnetic field parallel to c-axis at 4.2 K. A fine, soft Au wire is used to make a gentle mechanical contact on the top of a particular mesa in the array. Tunneling conductance characteristics were obtained and the magnetic field dependence of sumgap voltage peaks was investigated. These peaks do not change in position with increasing magnetic field for both contact configurations. In addition, the temperature dependence of tunneling characteristics of the IJJs are obtained and existence of pseudogap feature is observed above Tc for HgBr2 intercalated Bi2212.
ISSN: 1051-8223
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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