Spin-polarized transport through a device of single-ion magnet C18H23Er

doi:10.7523/j.issn.2095-6134.2018.03.003

Abstract

Abstract: We study the spin-polarized transport through devices of single molecule magnet. A device consisting of the scanning tunneling microscopy Co tip, the single-ion magnet of erbium, and the Au(111) substrate is set up. We calculate the spin-polarized I-V curves for the upward and downward structures of single-ion magnet at a small bias, and find that the tunnel magnetoresistance is as high as 120% and the efficiency of the spin filter at small bias is between 70%-100%. By comparing the spin rectification ratios of the two structures, we find that the downward structure has better spin rectifying effect. Based on the analyses of the transmission spectrum, the molecular projection Hamiltonian, and the projection device density of states, we give reasonable explainations for the above observations.

Key words: single-ion magnet, spin filter, spin rectification, tunnel magnetoresistance

CLC Number:

ZHOU Jie, WANG Zhengchuan. Spin-polarized transport through a device of single-ion magnet C₁₈H₂₃Er[J]. , 2018, 35(3): 302-307.

References

[1] Wolf S A, Awschalom D D, Buhrman R A, et al. Spintronics:a spin-based electronics vision for the future[J]. Science, 2001, 294(5546):1488-1495.
[2] Zutic I, Fabian J, Sarma S D. Spintronics:fundamentals and applications[J]. Reviews of Modern Physics, 2004, 76(2):323-410.
[3] Baibich M N, Broto J M, Fert A, et al. Giant magnetoresistance of (001)Fe/(001) Cr magnetic superlattices[J].Physical Review Letters, 1988, 61(21):2472-2475.
[4] Butler W H, Zhang X G, Schulthess T C. Spin-dependent tunneling conductance of Fe|MgO|Fe sandwiches[J]. Physical Review B, 2001, 63(5):054416.
[5] Yang Z, Wang D H, Liu X G, et al. Magnetic and quantum transport properties of small-sized transition-metal-pentalene sandwich cluster[J]. The Journal of Physical Chemistry C, 2014, 118(51):29695-29703.
[6] Heurich J, Cuevas J C, Wenzel W, et al. Electrical transport through single-molecule junctions:from molecular orbitals to conduction channels[J]. Physical Review Letters, 2002, 88(25):256803.
[7] Heersche H B, Groot Z D, Folk J A, et al. Electron transport through single Mn₁₂ molecular magnets[J]. Physical Review Letters, 2006, 96(20):206801.
[8] Bogani L, Wernsdorfer W. Molecular spintronics using single-molecule magnets[J]. Nature Materials, 2008, 7:179-186.
[9] Emberly E G, George K. Molecular spintronics:spin-dependent electron transport in molecular wires[J]. Chemical Physics, 2002, 281(2/3):311-324.
[10] Callsen M, Caciuc V, Kiselev N, et al. Magnetic hardening induced by nonmagnetic organic molecules[J]. Physical Review Letters, 2013, 111(10):106805.
[11] Dong Y J, Wang X F, Yang S W, et al. High performance current and spin diode of atomic carbon chain between transversely symmetric ribbon electrodes[J]. Scientific Reports, 2014, 4:6157.
[12] Cheng Z H, Du S X, Jiang N, et al. High resolution scanning-tunneling-microscopy imaging of individual molecular orbitals by eliminating the effect of surface charge[J]. Surface Science, 2011, 605(3/4):415-418.
[13] Repp J, Meyer G. Molecules on insulating films:scanning-tunneling microscopy imaging of individual molecular orbitals[J]. Physical Review Letters, 2005, 94(2):026803.
[14] Wang Y F, Wu K, Jörg K, et al. Review article:structures of phthalocyanine molecules on surfaces studied by STM[J]. AIP Advances, 2012, 2(4):041402.
[15] Sessoli R, Gatteschi D, Caneschi A, et al. Magnetic bistability in a metal-ion cluster[J]. Nature, 1993, 356:141-143.
[16] Gatteschi D, Caneschi A, Pardi L, et al. Large clusters of metal ions:the transition from molecular to bulk magnets[J]. Science, 1994, 265(5175):1054.
[17] Liao M S, Steve S. Electronic structure and bonding in metal phthalocyanines, Metal=Fe,Co,Ni,Cu,Zn,Mg[J]. Chemical Physics, 2001, 114(22):9780-9791.
[18] Hsu C H, Chu Y H, Lu C, et al. Spin-polarized transport through single manganese phthalocyanine molecules on a Co nanoisland[J]. Journal of Physical Chemistry C, 2015, 119:3374-3378.
[19] Gao L, Ji W, Hu Y B, et al. Site-specific kondo effect at ambient temperatures in iron-based molecules[J]. Physical Review Letters, 2007, 99(10):106402.
[20] Zhang Y, Liao P, Kan J, et al. Low-temperature scanning tunneling microscopy study on the electronic properties of a double-decker DyPc2 molecule at the surface[J]. Physical Chemistry Chemical Physics, 2015, 17(40):27019-27026.
[21] Jiang S D, Liu S S, Zhou L N, et al. Series of lanthanide organometallic single-ion magnets[J]. Inorganic Chemistry, 2012, 51(5):3079-3087.
[22] Meng Y S, Wang C H, Zhang Y Q, et al. (Boratabenzene)(cyclooctatetraenyl) lanthanide complexes:a new type of organometallic single-ion magnet[J]. Inorganic Chemistry, 2016, 3(6):828-835.
[23] Kresse G, Furthmuller J. Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set[J]. Physical Review B, 1996, 54(16):11169-11186.
[24] Brandbyge M, Mozos J L, Ordejón P, et al. Density-functional method for nonequilibrium electron transport[J]. Physical Review B, 2002, 65(16):165401.
[25] Stokbro K, Petersen D E, Smidstrup S, et al. Semiempirical model for nanoscale device simulations[J]. Physical Review B, 2010, 82(7):075420.
[26] Stokbro K, Taylor J, Brandbyge M, et al. Theoretical study of the nonlinear conductance of Di-thiol benzene coupled to Au(111) surfaces via thiol and thiolate bonds[J]. Computational Materials Science, 2003, 27(1/2):151-160.

Spin-polarized transport through a device of single-ion magnet C₁₈H₂₃Er

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 1

Recommended Articles

Metrics

Comments