Tetraethylammonium Trichlorogermanate(l‐) and Trichlorostannate(l‐)

Parshall, G. W.; Jolly, William L.; Iannone, Marco; Koo, Peter

doi:10.1002/9780470132463.ch48

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Cited by 9 publications

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“…(4). Note that our previous investigation in undoped BaFe2As2 and SrFe2As2 found a softening of the TA phonons on approaching the nematic phase transition [35], which tracks the nematic and magnetic fluctuations in the tetragonal phase [36].…”

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confidence: 64%

Soft phonons reveal the nematic correlation length in Ba(Fe0.94Co0.06)2As2

et al. 2018

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Nematicity is ubiquitous in electronic phases of high-Tc superconductors, particularly in the Fe-based systems. While several experiments have probed nematic fluctuations, they have been restricted to uniform or momentum averaged fluctuations. Here, we investigate the behavior of finite-momentum nematic fluctuations by utilizing the anomalous softening of acoustic phonon modes in optimally doped Ba(Fe0.94Co0.06)2As2. We determine the nematic correlation length and find that it sharply changes its T-dependence at Tc, revealing a strong connection between nematicity and superconductivity.

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confidence: 64%