Deep Co penetration and spin-polarization of C60 molecules at hybridized Co-C60 interfaces

被引：16

作者：

Cheng, Pei-Yu ^{[1
]}

Chiang, Meng-Ruei ^{[1
,2
,3
]}

Chan, Yuet-Loy ^{[1
]}

Hsu, Yao-Jane ^{[1
]}

Wang, Pen-Cheng ^{[2
,3
]}

Wei, D. H. ^{[1
,2
,4
]}

机构：

[1] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

[2] Natl Tsing Hua Univ, Grad Program Sci & Technol Synchrotron Light Sour, Hsinchu 30013, Taiwan

[3] Natl Tsing Hua Univ, Dept Engn & Syst Sci, Hsinchu 30013, Taiwan

[4] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 80424, Taiwan

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 04期

关键词：

PHOTOEMISSION; INJECTION; DICHROISM;

D O I：

10.1063/1.4863414

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We used near-edge x-ray absorption fine structure spectroscopy to identify the interplays at organic semiconductor-ferromagnet interfaces. When monitoring the L-edge intensity of 0.36 nm Co depositing on C-60 films of various thicknesses, we detected weaker Co signal from structures with larger C-60 thicknesses. Having determined that the electron mean escape depth in C-60 is 4.9 nm, further model analysis indicates that the decline of spectral intensity is due to deep penetration of Co clusters. Finally, C K-edge spectra reveal clear evidences of orbital hybridization between Co and C-60 as well as a visible dichroic effect at 125 K. (C) 2014 AIP Publishing LLC.

引用

页数：5

共 34 条

[1] Unravelling the role of the interface for spin injection into organic semiconductors [J].

Barraud, Clement ;

Seneor, Pierre ;

Mattana, Richard ;

Fusil, Stephane ;

Bouzehouane, Karim ;

Deranlot, Cyrile ;

Graziosi, Patrizio ;

Hueso, Luis ;

Bergenti, Ilaria ;

Dediu, Valentin ;

Petroff, Frederic ;

Fert, Albert .

NATURE PHYSICS, 2010, 6 (08) :615-620

[2] Understanding the role of tunneling barriers in organic spin valves by hard x-ray photoelectron spectroscopy [J].

Borgatti, F. ;

Bergenti, I. ;

Bona, F. ;

Dediu, V. ;

Fondacaro, A. ;

Huotari, S. ;

Monaco, G. ;

MacLaren, D. A. ;

Chapman, J. N. ;

Panaccione, G. .

APPLIED PHYSICS LETTERS, 2010, 96 (04)

[3] Magnetic Response of an Ultrathin Cobalt Film in Contact with an Organic Pentacene Layer [J].

Chan, Yuet-Loy ;

Hung, Ya-Jyuan ;

Wang, Chia-Hao ;

Lin, Ying-Chang ;

Chiu, Ching-Yuan ;

Lai, Yu-Ling ;

Chang, Hsu-Ting ;

Lee, Chih-Hao ;

Hsu, Y. J. ;

Wei, D. H. .

PHYSICAL REVIEW LETTERS, 2010, 104 (17)

[4] High-performance organic thin-film transistors with metal oxide/metal bilayer electrode [J].

Chu, CW ;

Li, SH ;

Chen, CW ;

Shrotriya, V ;

Yang, Y .

APPLIED PHYSICS LETTERS, 2005, 87 (19) :1-3

[5] Room temperature spin polarized injection in organic semiconductor [J].

Dediu, V ;

Murgia, M ;

Matacotta, FC ;

Taliani, C ;

Barbanera, S .

SOLID STATE COMMUNICATIONS, 2002, 122 (3-4) :181-184

[6] Room-temperature spintronic effects in Alq3-based hybrid devices [J].

Dediu, V. ;

Hueso, L. E. ;

Bergenti, I. ;

Riminucci, A. ;

Borgatti, F. ;

Graziosi, P. ;

Newby, C. ;

Casoli, F. ;

De Jong, M. P. ;

Taliani, C. ;

Zhan, Y. .

PHYSICAL REVIEW B, 2008, 78 (11)

[7] Room-Temperature Spin Transport in C60-Based Spin Valves [J].

Gobbi, Marco ;

Golmar, Federico ;

Llopis, Roger ;

Casanova, Felix ;

Hueso, Luis E. .

ADVANCED MATERIALS, 2011, 23 (14) :1609-+

[8] Enhancement of electron correlation in Co thin clusters grown on S/GaAs(001) [J].

Harasawa, Ayumi ;

Okuda, Taichi ;

Wakita, Takanori ;

Tohyama, Takahide ;

Eguchi, Toyoaki ;

Nakatsuji, Kan ;

Ueno, Nobuo ;

Nath, Krishna G. ;

Kinoshita, Toyohiko .

PHYSICAL REVIEW B, 2006, 73 (20)

[9] Enhanced Magnetic Anisotropy via Quasi-Molecular Magnet at Organic-Ferromagnetic Contact [J].

Hsu, Yao-Jane ;

Lai, Yu-Ling ;

Chen, Chih-Han ;

Lin, Ying-Chang ;

Chien, Hsiu-Yun ;

Wang, Jeng-Han ;

Lam, Tu-Ngoc ;

Chan, Yuet-Loy ;

Wei, D. H. ;

Lin, Hong-Ji ;

Chen, Chien-Te .

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2013, 4 (02) :310-316

[10] CLOSE SIMILARITY OF THE ELECTRONIC-STRUCTURE AND ELECTRON CORRELATION IN GAS-PHASE AND SOLID C-60 [J].

KRUMMACHER, S ;

BIERMANN, M ;

NEEB, M ;

LIEBSCH, A ;

EBERHARDT, W .

PHYSICAL REVIEW B, 1993, 48 (11) :8424-8429

← 1 2 3 4 →