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The strikingly different charge transport behaviors in nanocomposites of multiwall carbon nanotubes (MWNTs) and conducting polymer polyethylene dioxythiophene - polystyrene sulfonic acid (PEDOT-PSS) at low temperatures are explained by…

Mesoscale and Nanoscale Physics · Physics 2015-05-28 Paramita Kar Choudhury , S. Ramaprabhu , K. P. Ramesh , Reghu Menon

Semiconductors with strong spin-orbit interactions can exhibit a helical gap with spin-momentum locking opened by a magnetic field. Such a gap is highly spin selective as a result of a topologically protected spin-momentum locking, which…

Mesoscale and Nanoscale Physics · Physics 2020-08-06 Jian Sun , Russell S. Deacon , Xiaochi Liu , Jun Yao , Koji Ishibashi

We performed studies of coherent electronic transport through a single walled carbon nanotube. In the calculations multiple scattering on the contacts and interference processes were taken into account. Conductance is a composition of…

Materials Science · Physics 2016-08-31 W. Iwo Babiaczyk , Bogdan. R. Bulka

We calculate the current-voltage characteristic of a one-dimensional band insulator with magnetic field and Rashba spin-orbit coupling which is connected to nonmagnetic leads. Without spin-orbit coupling we find a complete spin-filtering…

Mesoscale and Nanoscale Physics · Physics 2011-12-02 Thibaut Jonckheere , George Japaridze , Thierry Martin , Roland Hayn

The experiment that the high spin selectivity and the length-dependent spin polarization are observed in double-stranded DNA [Science ${\bf 331}$, 894 (2011)], is elucidated by considering the combination of the spin-orbit coupling, the…

Mesoscale and Nanoscale Physics · Physics 2015-06-03 Ai-Min Guo , Qing-feng Sun

Spintronics is an approach to electronics in which the spin of the electrons is exploited to control the electric resistance R of devices. One basic building block is the spin-valve, which is formed if two ferromagnetic electrodes are…

Mesoscale and Nanoscale Physics · Physics 2016-08-16 Sangeeta Sahoo , Takis Kontos , Jürg Furer , Christian Hoffmann , Matthias Gräber , Audrey Cottet , Christian Schönenberger

We theoretically study the magnetoresistance of single wall carbon nanotubes (SWCNTs) in the ballistic transport regime, using a standard tight-binding approach. The main attention is directed to spin-polarized electrical transport in the…

Mesoscale and Nanoscale Physics · Physics 2015-06-25 S. Krompiewski , Gianaurelio Cuniberti

Using low-resistance electrical contacts, we have measured the intrinsic high-field transport properties of metallic single-wall carbon nanotubes. Individual nanotubes appear to be able to carry currents with a density exceeding 10^9…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 Zhen Yao , Charles L. Kane , Cees Dekker

One of the actual challenges of spintronics is the realization of a spin-transistor allowing to control spin transport through an electrostatic gate. In this review, we report on different experiments which demonstrate a gate control of…

In this paper we review the recent field of organic spintronics, where organic materials are applied as a medium to transport and control spin-polarized signals. The contacts for injecting and detecting spins are formed by metals, oxides,…

Mesoscale and Nanoscale Physics · Physics 2007-06-13 W. J. M. Naber , S. Faez , W. G. van der Wiel

Over the recent years, crossroads of magnetism and superconductivity led to the emerging field of superconducting spintronics. A cornerstone of this venture is the generation of equal-spin triplet Cooper pairs in superconductor-ferromagnet…

Superconductivity · Physics 2025-12-22 Pablo Tuero , César González-Ruano , Igor Žutić , Yuan Lu , Coriolan Tiusan , Farkhad G. Aliev

We report ab initio calculations of spin-dependent transport in single atomic carbon chains bridging two zigzag graphene nanoribbon electrodes. Our calculations show that carbon atomic chains coupled to graphene electrodes are perfect…

Materials Science · Physics 2010-10-28 M. G. Zeng , L. Shen , Y. Q. Cai , Z. D. Sha , Y. P. Feng

Electron transfer (ET) in biological molecules such as peptides and proteins consists of electrons moving between well defined localized states (donors to acceptors) through a tunneling process. Here we present an analytical model for ET by…

Mesoscale and Nanoscale Physics · Physics 2020-07-01 Solmar Varela , Iskra Zambrano , Bertrand Berche , Vladimiro Mujica , Ernesto Medina

The electrical characteristics of a carbon nanotube can be significantly modified by applying elastic strain. This study focuses on exploring this phenomenon in a single-walled carbon nanotube (SWNT) using tight-binding transport…

Mesoscale and Nanoscale Physics · Physics 2024-09-10 Naif Hadadi , Adel Belayadi , Ousmane Ly , Adel Abbout

Whereas spintronics brings the spin degree of freedom to electronic devices, molecular/organic electronics adds the opportunity to play with the chemical versatility. Here we show how, as a contender to commonly used inorganic materials,…

The interplay between chirality and magnetism has been a source of fascination among scientists for over a century. In recent years, chirality-induced spin selectivity (CISS) has attracted renewed interest. It has been observed that…

Mesoscale and Nanoscale Physics · Physics 2024-08-07 Mohammad Reza Safari , Frank Matthes , Claus M. Schneider , Karl-Heinz Ernst , Daniel E. Bürgler

Spin qubits defined in carbon nanotube quantum dots are of considerable interest for encoding and manipulating quantum information because of the long electron spin coherence times expected. However, before carbon nanotubes can find…

Mesoscale and Nanoscale Physics · Physics 2010-04-27 S. J. Chorley , G. Giavaras , J. Wabnig , G. A. C. Jones , C. G. Smith , G. A. D. Briggs , M. R. Buitelaar

The experimental observation of the Dirac fermion states in $\beta_{12}$-borophene sheets and the discovery of their novel topological properties properties have made them a promising candidate for spintronic applications. Here, by…

Mesoscale and Nanoscale Physics · Physics 2022-01-05 Fahimeh Norouzi , Mohsen Farokhnezhad , Mahdi Esmaeilzadeh , Bartlomiej Szafran

The magneto-conductance of an open carbon nanotube (CNT)-quantum wire was measured in pulsed magnetic fields. At low temperatures we find a peculiar split magneto-conductance peak close to the charge neutrality point. Our analysis of the…

Mesoscale and Nanoscale Physics · Physics 2010-11-19 S. H. Jhang , M. Marganska , Y. Skourski , D. Preusche , B. Witkamp , M. Grifoni , H. van der Zant , J. Wosnitza , C. Strunk

We have studied spin carrier dynamics under full spin-orbit coupling. The anisotropy of dispersions for independent circular spinor polarizations is explored as a possible vertical multichannel voltage controlled spin-filter. Small voltage…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 G. E. Marques , A. C. R. Bittencourt , C. F. Destefani , Sergio E. Ulloa