Charge and spin transport in PEDOT:PSS nanoscale lateral devices

被引：23

作者：

de Oliveira, Thales V. A. G. ^{[1
]}

Gobbi, Marco ^{[1
]}

Porro, Jose M. ^{[1
]}

Hueso, Luis E. ^{[1
,2
]}

Bittner, Alexander M. ^{[1
,2
]}

机构：

[1] CIC NanoGUNE, E-20018 Donostia San Sebastian, Basque Country, Spain

[2] Basque Fdn Sci, IKERBASQUE, E-48011 Bilbao, Basque Country, Spain

来源：

NANOTECHNOLOGY | 2013年 / 24卷 / 47期

基金：

欧盟第七框架计划; 欧洲研究理事会;

关键词：

GIANT MAGNETORESISTANCE; ROOM-TEMPERATURE; CONDUCTIVITY; INJECTION; ENHANCEMENT; INTERFACE; FILMS;

D O I：

10.1088/0957-4484/24/47/475201

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The electrical transport of the highly conductive poly-(3,4-ethylenedioxythiophene): poly(styrenesulfonic acid) (PEDOT:PSS) is investigated with Ohmic and spin-polarized tunnel contacts at nanoscale lateral dimensions. Temperature-dependent charge transport measurements reveal that electrical conductivity scales non-linearly as a function of electrode spacing, which is attributed to the localization of carriers induced by the disorder introduced by the PSS polyelectrolyte. In addition, we demonstrate the integration of this conducting polymer in nanoscale lateral spin-valve devices by increasing the pH of the PEDOT: PSS solution. We present charge and magnetotransport measurement results of NiFe/AlOx/PEDOT:PSS/AlOx/NiFe lateral structures for various thicknesses of the alumina tunnel barriers. We discuss the absence of magnetoresistance of our spin valves within the framework of Valet-Fert theory, and estimate an upper limit for the spin lifetime of carriers in PEDOT: PSS to tau(sf) <= 50 ns.

引用

页数：10

共 53 条

[1] Transport properties of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) [J].

Aleshin, AN ;

Williams, SR ;

Heeger, AJ .

SYNTHETIC METALS, 1998, 94 (02) :173-177

[2] Robust absolute magnetometry with organic thin-film devices [J].

Baker, W. J. ;

Ambal, K. ;

Waters, D. P. ;

Baarda, R. ;

Morishita, H. ;

van Schooten, K. ;

McCamey, D. R. ;

Lupton, J. M. ;

Boehme, C. .

NATURE COMMUNICATIONS, 2012, 3

[3] 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

[4] Current-perpendicular (CPP) magnetoresistance in magnetic metallic multilayers [J].

Bass, J ;

Pratt, WP .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 200 (1-3) :274-289

[5] Variable range hopping transport in ferromagnetic GaGdN epitaxial layers [J].

Bedoya-Pinto, A. ;

Malindretos, J. ;

Roever, M. ;

Mai, D. D. ;

Rizzi, A. .

PHYSICAL REVIEW B, 2009, 80 (19)

[6] 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

[7]

Dediu VA, 2009, NAT MATER, V8, P707, DOI [10.1038/nmat2510, 10.1038/NMAT2510]

[8]

Fert A., 2001, Physical Review B, V64, P1

[9]

Fukuma Y, 2011, NAT MATER, V10, P527, DOI [10.1038/nmat3046, 10.1038/NMAT3046]

[10] 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-+

← 1 2 3 4 5 6 →