2017
DOI: 10.1021/acs.jpcc.7b02368
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Breakdown of Polarons in Conducting Polymers at Device Field Strengths

Abstract: Conducting polymers have become standard engineering materials, used in many electronic devices. Despite this, there is a lack of understanding of the microscopic origin of the conducting properties, especially at realistic device field strengths. We present simulations of doped poly(p-phenylene) (PPP) using a Su-Schrieffer-Heeger (SSH) tight-binding model, with the electric field included in the Hamiltonian through a time-dependent vector potential via Peierls substitution of the phase factor. We find that po… Show more

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Cited by 13 publications
(7 citation statements)
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“…Bipolarons stand out as an important example of the opposite limit, where two quasiparticles, socalled polarons, form a bound state much smaller than the average distance between the unbound polarons. The formation of bipolarons is suggested to be the mechanism behind electrical conduction in polymer chains [5,6], organic magnetoresistance [7], and even high temperature superconductivity [8,9].…”
mentioning
confidence: 99%
“…Bipolarons stand out as an important example of the opposite limit, where two quasiparticles, socalled polarons, form a bound state much smaller than the average distance between the unbound polarons. The formation of bipolarons is suggested to be the mechanism behind electrical conduction in polymer chains [5,6], organic magnetoresistance [7], and even high temperature superconductivity [8,9].…”
mentioning
confidence: 99%
“…In material science polarons are encountered in several classes of technologically relevant materials, for instance, in He droplets [2,3], polar [4][5][6][7][8] or organic [9][10][11] semiconductors and transition metal oxides [12,13], while their broad relevance stretches even towards biophysics [14]. Their formation, properties and interactions are key elements in important phenomena such as the electric conductivity of polymers [15,16], the organic magnetoresistance [17], the Kondo effect [18] and even high-temperature superconductivity [19][20][21][22][23][24]. Therefore, it is not surprising that ultracold atoms, being one of the prime platforms for quantum simulation [25], have been employed for studying polaronic structures.…”
Section: Introductionmentioning
confidence: 99%
“…When an electron travels through a material, it gets dressed by the low-energy excitations of the lattice (phonons), forming a polaron with renormalised energy and mass [2]. Polarons give insight into transport properties in semiconductors [3], electrical conduction in polymer chains [4], spin transport in organic materials [5,6] and superconductivity [7]. Moreover, they can be used as a "probe" for highly correlated quantum many-body environments as well, for instance, 3 He impurities immersed into 4 He superfluids [8].…”
Section: Introductionmentioning
confidence: 99%
“…Polarons give insight into transport properties in semiconductors [3], electrical conduction in polymer chains [4], spin transport in organic materials [5,6] and superconductivity [7]. Moreover, they can be used as a "probe" for highly correlated quantum many-body environments as well, for instance, 3 He impurities immersed into 4 He superfluids [8].…”
Section: Introductionmentioning
confidence: 99%