We report on the temperature dependence of the spatially modulated spin-polarization amplitude $\ensuremath\DeltaK_spin$, which is a hallmark of the superconducting Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state. For that, we use $^13C$ nuclear magnetic resonance (NMR) spectroscopy performed on the organic conductor $\beta^''\ensuremath-(ET)_2SF_5CH_2CF_2SO_3$. From a comparison of our experimental results to a comprehensive modeling of the $^13C$ NMR spectra, we determine the evolution of $\ensuremath\DeltaK_spin$ upon condensation of the FFLO state. Further, the modeling of the spectra in the superconducting phase allows to quantify the decrease of the average spin susceptibility, stemming from the spin-singlet coupling of the superconducting electron pairs in the FFLO state of $\beta^''\ensuremath-(ET)_2SF_5CH_2CF_2SO_3$.
Description
Phys. Rev. B 109, L020504 (2024) - Order-parameter evolution in the Fulde-Ferrell-Larkin-Ovchinnikov phase
%0 Journal Article
%1 PhysRevB.109.L020504
%A Molatta, S.
%A Kotte, T.
%A Opherden, D.
%A Koutroulakis, G.
%A Schlueter, J. A.
%A Zwicknagl, G.
%A Brown, S. E.
%A Wosnitza, J.
%A Kühne, H.
%D 2024
%I American Physical Society
%J Phys. Rev. B
%K a
%N 2
%P L020504
%R 10.1103/PhysRevB.109.L020504
%T Order-parameter evolution in the Fulde-Ferrell-Larkin-Ovchinnikov phase
%U https://link.aps.org/doi/10.1103/PhysRevB.109.L020504
%V 109
%X We report on the temperature dependence of the spatially modulated spin-polarization amplitude $\ensuremath\DeltaK_spin$, which is a hallmark of the superconducting Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state. For that, we use $^13C$ nuclear magnetic resonance (NMR) spectroscopy performed on the organic conductor $\beta^''\ensuremath-(ET)_2SF_5CH_2CF_2SO_3$. From a comparison of our experimental results to a comprehensive modeling of the $^13C$ NMR spectra, we determine the evolution of $\ensuremath\DeltaK_spin$ upon condensation of the FFLO state. Further, the modeling of the spectra in the superconducting phase allows to quantify the decrease of the average spin susceptibility, stemming from the spin-singlet coupling of the superconducting electron pairs in the FFLO state of $\beta^''\ensuremath-(ET)_2SF_5CH_2CF_2SO_3$.
@article{PhysRevB.109.L020504,
abstract = {We report on the temperature dependence of the spatially modulated spin-polarization amplitude $\mathrm{\ensuremath{\Delta}}{K}_{\text{spin}}$, which is a hallmark of the superconducting Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state. For that, we use $^{13}\mathrm{C}$ nuclear magnetic resonance (NMR) spectroscopy performed on the organic conductor ${\ensuremath{\beta}}^{\ensuremath{'}\ensuremath{'}}\text{\ensuremath{-}}{(\mathrm{ET})}_{2}{\mathrm{SF}}_{5}{\mathrm{CH}}_{2}{\mathrm{CF}}_{2}{\mathrm{SO}}_{3}$. From a comparison of our experimental results to a comprehensive modeling of the $^{13}\mathrm{C}$ NMR spectra, we determine the evolution of $\mathrm{\ensuremath{\Delta}}{K}_{\text{spin}}$ upon condensation of the FFLO state. Further, the modeling of the spectra in the superconducting phase allows to quantify the decrease of the average spin susceptibility, stemming from the spin-singlet coupling of the superconducting electron pairs in the FFLO state of ${\ensuremath{\beta}}^{\ensuremath{'}\ensuremath{'}}\text{\ensuremath{-}}{(\mathrm{ET})}_{2}{\mathrm{SF}}_{5}{\mathrm{CH}}_{2}{\mathrm{CF}}_{2}{\mathrm{SO}}_{3}$.},
added-at = {2024-01-31T10:19:16.000+0100},
author = {Molatta, S. and Kotte, T. and Opherden, D. and Koutroulakis, G. and Schlueter, J. A. and Zwicknagl, G. and Brown, S. E. and Wosnitza, J. and Kühne, H.},
biburl = {https://www.bibsonomy.org/bibtex/2174a93d88a5e78e5762ad9314d52b5ac/ctqmat},
day = 22,
description = {Phys. Rev. B 109, L020504 (2024) - Order-parameter evolution in the Fulde-Ferrell-Larkin-Ovchinnikov phase},
doi = {10.1103/PhysRevB.109.L020504},
interhash = {af3e18a6db5d0d7f36e2a20f8e12c256},
intrahash = {174a93d88a5e78e5762ad9314d52b5ac},
journal = {Phys. Rev. B},
keywords = {a},
month = {01},
number = 2,
numpages = {5},
pages = {L020504},
publisher = {American Physical Society},
timestamp = {2024-01-31T10:19:16.000+0100},
title = {Order-parameter evolution in the Fulde-Ferrell-Larkin-Ovchinnikov phase},
url = {https://link.aps.org/doi/10.1103/PhysRevB.109.L020504},
volume = 109,
year = 2024
}