Nonequilibrium transport through a disordered molecular nanowire

Thiessen, P.; Díaz, Elena; Römer, Rudolf A.; Domı́nguez-Adame, F.

doi:10.1103/physrevb.95.195431

Cited by 8 publications

(3 citation statements)

References 44 publications

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“…In Ref. 56, it was also demonstrated that the effective hopping increases with lowering the temperature in molecular nanowires. Therefore, the eventual inclusion of on-site disorder correlations in our model would lead to a lower effective temperature in our simulations.…”

Section: Articlementioning

confidence: 97%

Spin-dependent polaron transport in helical molecules

Izquierdo

Balduque

Domı́nguez-Adame

et al. 2022

Applied Physics Letters

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We study thermal effects on spin transport along a deformable helical molecule in the presence of chiral-induced spin–orbit coupling. The carrier–lattice interaction is modeled by the well-established Peyrard–Bishop–Holstein model within the Langevin approach to include temperature as a stochastic noise. The carrier–lattice interaction causes the occurrence of polaron states in the molecule. We demonstrate the existence of two well-differentiated spin-dependent polaron transport regimes as a function of temperature. In the low-temperature regime, the spatial separation of the two spin-dependent polaron wave-packets results in a nonzero spin current. On the contrary, the spin current becomes negligible if the temperature of the system is high enough. Finally, we characterize this transition and estimate the critical temperature at which it takes place.

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Section: Articlementioning

confidence: 97%

Spin-dependent polaron transport in helical molecules

Izquierdo

Balduque

Domı́nguez-Adame

et al. 2022

Applied Physics Letters

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“…In principle, polymers are built or grown as disordered chains, difficulting the electronic transport [110]. But, since these chains are one dimensional, restricting the dimension of the material, i.e.…”

Section: Organic Nanowiresmentioning

confidence: 99%

Nanowires: A route to efficient thermoelectric devices

Domı́nguez-Adame

Martín‐González

Sánchez

et al. 2019

Physica E: Low-dimensional Systems and Nanostructures

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Miniaturization of electronic devices aims at manufacturing ever smaller products, from mesoscopic to nanoscopic sizes. This trend is challenging because the increased levels of dissipated power demands a better understanding of heat transport in small volumes. A significant amount of the consumed energy in electronics is transformed into heat and dissipated to the environment. Thermoelectric materials offer the possibility to harness dissipated energy and make devices less energy-demanding. Heat-to-electricity conversion requires materials with a strongly suppressed thermal conductivity but still high electronic conduction. Nanowires can meet nicely these two requirements because enhanced phonon scattering at the surface and defects reduces the lattice thermal conductivity while electric conductivity is not deteriorated, leading to an overall remarkable thermoelectric efficiency. Therefore, nanowires are regarded as a promising route to achieving valuable thermoelectric materials at the nanoscale. In this paper, we present an overview of key experimental and theoretical results concerning the thermoelectric properties of nanowires. The focus of this review is put on the physical mechanisms by which the efficiency of nanowires can be improved. Phonon scattering at surfaces and interfaces, enhancement of the power factor by quantum effects and topological protection of electron states to prevent the degradation of electrical conductivity in nanowires are thoroughly discussed.

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“…That could explain to a great extent some unusual transport properties of several types of polymers [17,18]. Right after this discovery, a handful of works came along to investigate the role of disorder correlations, either short-or long-ranged, in wide variety of physical systems [19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40]. Particularly, it was shown in Refs.…”

Section: Introductionmentioning

confidence: 96%

Localization properties and high-fidelity state transfer in hopping models with correlated disorder

et al. 2018

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We investigate a tight-binding electronic chain featuring diagonal and offdiagonal disorder, these being modelled through the long-range-correlated fractional Brownian motion. Particularly, by employing exact diagonalization methods, we evaluate how the eigenstate spectrum of the system and its related single-particle dynamics respond to both competing sources of disorder. Moreover, we report the possibility of carrying out efficient end-to-end quantum-state transfer protocols even in the presence of such generalized disorder due to the appearance of extended states around the middle of the band in the limit of strong correlations.

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Nonequilibrium transport through a disordered molecular nanowire

Cited by 8 publications

References 44 publications

Spin-dependent polaron transport in helical molecules

Spin-dependent polaron transport in helical molecules

Nanowires: A route to efficient thermoelectric devices

Localization properties and high-fidelity state transfer in hopping models with correlated disorder

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