| Autor: |
Ikeda, Matthias S., Worasaran, Thanapat, Palmstrom, Johanna C., Walmsley, Philip, Fisher, Ian R. |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
Phys. Rev. B 98, 245133 (2018) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.98.245133 |
| Popis: |
We report the separate response of the critical temperature of the nematic phase transition $T_{\rm S}$ to symmetric and antisymmetric strains for the prototypical underdoped iron pnictide Ba(Fe$_{0.975}$Co$_{0.025}$)$_2$As$_2$. This decomposition is achieved by comparing the response of $T_{\rm S}$ to uniaxial stress and hydrostatic pressure. In addition to quantifying the two distinct linear responses to symmetric strains, we find a quadratic variation of $T_{\rm S}$ as a response to antisymmetric strains $\epsilon_{\rm B_{1g}}$=$\frac{1}{2}$($\epsilon_{\rm xx}$-$\epsilon_{\rm yy}$), exceeding the non linear response to symmetric strains by at least two orders of magnitude. These observations establish orthogonal antisymmetric strain as a powerful tuning parameter for nematic order. |
| Databáze: |
arXiv |
| Externí odkaz: |
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