Organic magnetoresistance based on hopping theory

被引：6

作者：

Yang Fu-Jiang ^{[1
]}

Xie Shi-Jie ^{[1
]}

机构：

[1] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

来源：

CHINESE PHYSICS B | 2014年 / 23卷 / 09期

基金：

中国国家自然科学基金;

关键词：

hopping; organic magnetoresistance; master equation; hyperfine interaction; LIGHT-EMITTING-DIODES; ROOM-TEMPERATURE; CONJUGATED POLYMER; SEMICONDUCTORS; MOBILITY; DEVICES; FIELD;

D O I：

10.1088/1674-1056/23/9/097306

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

For the organic magnetoresistance (OMAR) effect, we suggest a spin-related hopping of carriers (polarons) based on Marcus theory. The mobility of polarons is calculated with the master equation (ME) and then the magnetoresistance (MR) is obtained. The theoretical results are consistent with the experimental observation. Especially, the sign inversion of the MR under different driving bias voltages found in the experiment is predicted. Besides, the effects of molecule disorder, hyperfine interaction (HFI), polaron localization, and temperature on the MR are investigated.

引用

页数：5

共 33 条

[21]

Nguyen TD, 2010, NAT MATER, V9, P345, DOI [10.1038/NMAT2633, 10.1038/nmat2633]

[22] Unified description of charge-carrier mobilities in disordered semiconducting polymers [J].

Pasveer, WF ;

Cottaar, J ;

Tanase, C ;

Coehoorn, R ;

Bobbert, PA ;

Blom, PWM ;

de Leeuw, DM ;

Michels, MAJ .

PHYSICAL REVIEW LETTERS, 2005, 94 (20)

[23] Anomalous room temperature magnetoresistance in organic semiconductors [J].

Prigodin, V. N. ;

Bergeson, J. D. ;

Lincoln, D. M. ;

Epstein, A. J. .

SYNTHETIC METALS, 2006, 156 (9-10) :757-761

[24] Investigation on organic magnetoconductance based on polaron-bipolaron transition [J].

Qin, W. ;

Yin, S. ;

Gao, K. ;

Xie, S. J. .

APPLIED PHYSICS LETTERS, 2012, 100 (23)

[25] Study on the temperature effect of magnetoresistance in organic device Co/Alq3/La1-xSrxMnO3 (LSMO) [J].

Qin Wei ;

Zhang Yu-Bin ;

Xie Shi-Jie .

ACTA PHYSICA SINICA, 2010, 59 (05) :3494-3498

[26] Current spin polarization in ferromagnetic/organic semiconductor/ferromagnetic system [J].

Ren Jun-Feng ;

Zhang Yu-Bin ;

Xie Shi-Jie .

ACTA PHYSICA SINICA, 2007, 56 (08) :4785-4790

[27] The magnetic field effect on the transport and efficiency of group III tris(8-hydroxyquinoline) organic light emitting diodes [J].

Shakya, P. ;

Desai, P. ;

Somerton, M. ;

Gannaway, G. ;

Kreouzis, T. ;

Gillin, W. P. .

JOURNAL OF APPLIED PHYSICS, 2008, 103 (10)

[28] Hyperfine interaction and magnetoresistance in organic semiconductors [J].

Sheng, Y. ;

Nguyen, T. D. ;

Veeraraghavan, G. ;

Mermer, O. ;

Wohlgenannt, M. ;

Qiu, S. ;

Scherf, U. .

PHYSICAL REVIEW B, 2006, 74 (04)

[29] Magnetic Field Effects in π-Conjugated Polymer-Fullerene Blends: Evidence for Multiple Components [J].

Wang, F. J. ;

Baessler, Heinz ;

Vardeny, Z. Valy .

PHYSICAL REVIEW LETTERS, 2008, 101 (23)

[30] Giant magnetoresistance in organic spin-valves [J].

Xiong, ZH ;

Wu, D ;

Vardeny, ZV ;

Shi, J .

NATURE, 2004, 427 (6977) :821-824

← 1 2 3 4 →