Tuning interfacial spin filters from metallic to resistive within a single organic semiconductor family

被引：8
|
作者：
Wang, Jingying [1 ]
Deloach, Andrew [1 ]
Jiang, Wei [2 ]
Papa, Christopher M. [3 ]
Myahkostupov, Mykhaylo [3 ]
Castellano, Felix N. [3 ]
Liu, Feng [2 ]
Dougherty, Daniel B. [1 ]
机构：
[1] North Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA
[2] Univ Utah, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USA
[3] North Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA
来源：
PHYSICAL REVIEW B | 2017年 / 95卷 / 24期
关键词：
GIANT MAGNETORESISTANCE; INJECTION; MOLECULE; SPINTRONICS; SPINTERFACE; CHEMISORPTION; TRANSPORT; STATES;
D O I：
10.1103/PhysRevB.95.241410
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A metallic spin filter is observed at the interface between Alq(3) adsorbates and a Cr(001) surface. It can be changed to a resistive (i.e., gapped) filter by substituting Cr ions to make Crq(3) adsorbates. Spin-polarized scanning tunneling microscopy and spectroscopy show these spin-dependent electronic structure changes with single molecule resolution. Density functional theory calculations highlight the structural and electronic differences at the interfaces. For Alq(3), a charge-transfer interaction with the substrate leads to a metallic spin filter. For Crq(3), direct covalent interactions mix molecular orbitals with the substrate surface state to make two well-separated interfacial hybrid orbitals.
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收藏
页数：5
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