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Title: Polaron spin echo envelope modulations in an organic semiconducting polymer

Abstract

Here, we present a theoretical analysis of the electron spin echo envelope modulation (ESEEM) spectra of polarons in semiconducting π -conjugated polymers. We show that the contact hyperfine coupling and the dipolar interaction between the polaron and the proton spins give rise to different features in the ESEEM spectra. Our theory enables direct selective probe of different groups of nuclear spins, which affect the polaron spin dynamics. Namely, we demonstrate how the signal from the distant protons (coupled to the polaron spin via dipolar interactions) can be distinguished from the signal coming from the protons residing on the polaron site (coupled to the polaron spin via contact hyperfine interaction). We propose a method for directly probing the contact hyperfine interaction, that would enable detailed study of the polaron orbital state and its immediate environment. Lastly, we also analyze the decay of the spin echo modulation, and its connection to the polaron transport.

Authors:
 [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1368056
Alternate Identifier(s):
OSTI ID: 1361441
Report Number(s):
IS-J-9351
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1702750
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 21; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Mkhitaryan, V. V., and Dobrovitski, V. V. Polaron spin echo envelope modulations in an organic semiconducting polymer. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.214202.
Mkhitaryan, V. V., & Dobrovitski, V. V. Polaron spin echo envelope modulations in an organic semiconducting polymer. United States. doi:10.1103/PhysRevB.95.214202.
Mkhitaryan, V. V., and Dobrovitski, V. V. Thu . "Polaron spin echo envelope modulations in an organic semiconducting polymer". United States. doi:10.1103/PhysRevB.95.214202. https://www.osti.gov/servlets/purl/1368056.
@article{osti_1368056,
title = {Polaron spin echo envelope modulations in an organic semiconducting polymer},
author = {Mkhitaryan, V. V. and Dobrovitski, V. V.},
abstractNote = {Here, we present a theoretical analysis of the electron spin echo envelope modulation (ESEEM) spectra of polarons in semiconducting π -conjugated polymers. We show that the contact hyperfine coupling and the dipolar interaction between the polaron and the proton spins give rise to different features in the ESEEM spectra. Our theory enables direct selective probe of different groups of nuclear spins, which affect the polaron spin dynamics. Namely, we demonstrate how the signal from the distant protons (coupled to the polaron spin via dipolar interactions) can be distinguished from the signal coming from the protons residing on the polaron site (coupled to the polaron spin via contact hyperfine interaction). We propose a method for directly probing the contact hyperfine interaction, that would enable detailed study of the polaron orbital state and its immediate environment. Lastly, we also analyze the decay of the spin echo modulation, and its connection to the polaron transport.},
doi = {10.1103/PhysRevB.95.214202},
journal = {Physical Review B},
number = 21,
volume = 95,
place = {United States},
year = {2017},
month = {6}
}

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