Signatures of Anelastic Domain Relaxation in Ba(Fe$_{1-x}$Co$_{x}$)$_{2}$As$_{2}$ Investigated by Mechanical Modulation of Resistivity

Hristov, Alexander T.; Ikeda, Matthias S.; Palmstrom, Johanna C.; Fisher, Ian R.

doi:10.48550/arxiv.1903.04732

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…Below T nem , d(∆R yy /R yy )/d( xx − yy ) drops quickly and flattens upon further cooling. In this temperature range, the elastoresistance response is dominated [257] by the formation of the structural twin domains, and thus is expected to be dominated by extrinsic effects. Upon pressurization, the overall temperature dependence of d(∆R yy /R yy )/d( xx − yy ) is not strongly affected by pressure.…”

Section: Combining Hydrostatic and Uniaxial Pressure: Proof-of-princi...mentioning

confidence: 99%

Hydrostatic and uniaxial pressure tuning of iron-based superconductors: Insights into superconductivity, magnetism, nematicity and collapsed tetragonal transitions

Gati,

Xiang,

Bud'ko

et al. 2020

Preprint

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Iron-based superconductors are well-known for their intriguing phase diagrams, which manifest a complex interplay of electronic, magnetic and structural degrees of freedom. Among the phase transitions observed are superconducting, magnetic, and several types of structural transitions, including a tetragonal-to-orthorhombic and a collapsed-tetragonal transition. In particular, the widely-observed tetragonal-to-orthorhombic transition is believed to be a result of an electronic order that is coupled to the crystalline lattice and is, thus, referred to as nematic transition. Nematicity is therefore a prominent feature of these materials, which signals the importance of the coupling of electronic and lattice properties. Correspondingly, these systems are particularly susceptible to tuning via pressure (hydrostatic, uniaxial, or some combination). We review efforts to probe the phase diagrams of pressure-tuned iron-based superconductors, with a strong focus on our own recent insights into the phase diagrams of several members of this material class under hydrostatic pressure. These studies on FeSe, Ba(Fe1−xCox)2As2, Ca(Fe1−xCox)2As2 and CaK(Fe1−xNix)4As4 were, to a significant extent, made possible by advances of what measurements can be adapted to the use under differing pressure environments. We point out the potential impact of these tools for the study of the wider class of strongly correlated electron systems.

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Section: Combining Hydrostatic and Uniaxial Pressure: Proof-of-princi...mentioning

confidence: 99%

Hydrostatic and uniaxial pressure tuning of iron-based superconductors: Insights into superconductivity, magnetism, nematicity and collapsed tetragonal transitions

Gati,

Xiang,

Bud'ko

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…Modern piezoelectric technology easily facilitates the in situ application of small oscillating stresses at temperatures spanning from above room temperature to below 1 K, such that a single apparatus can access large regimes of phase space. 12 Finally, by introducing frequency as a new tuning parameter, the AC-ECE creates the possibility of exploring dynamical effects intrinsic to the sample material, such as the motion of domain walls 13 .…”

Section: Introductionmentioning

confidence: 99%

Frequency-dependent sensitivity of AC elastocaloric effect measurements explored through analytical and numerical models

Straquadine,

Ikeda,

Fisher

2020

Preprint

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We present a comprehensive study of the frequency-dependent sensitivity for measurements of the AC elastocaloric effect by applying both exactly soluble models and numerical methods to the oscillating heat flow problem. These models reproduce the finer details of the thermal transfer functions observed in experiments, considering here representative data for single-crystal Ba(Fe 1−x Co x ) 2 As 2 . Based on our results, we propose a set of practical guidelines for experimentalists using this technique. This work establishes a baseline against which the frequency response of the AC elastocaloric technique can be compared and provides intuitive explanations of the detailed structure observed in experiments.

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Signatures of Anelastic Domain Relaxation in Ba(Fe$_{1-x}$Co$_{x}$)$_{2}$As$_{2}$ Investigated by Mechanical Modulation of Resistivity

Cited by 2 publications

References 9 publications

Hydrostatic and uniaxial pressure tuning of iron-based superconductors: Insights into superconductivity, magnetism, nematicity and collapsed tetragonal transitions

Hydrostatic and uniaxial pressure tuning of iron-based superconductors: Insights into superconductivity, magnetism, nematicity and collapsed tetragonal transitions

Frequency-dependent sensitivity of AC elastocaloric effect measurements explored through analytical and numerical models

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