| Autor: |
Lederer, S., Jost, D., Böhm, T., Hackl, R., Berg, E., Kivelson, S. |
| Rok vydání: |
2019 |
| Předmět: |
|
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1080/14786435.2020.1768604 |
| Popis: |
Theoretical analysis typically involves imaginary-time correlation functions. Inferring real-time dynamical response functions from this information is notoriously difficult. However, as we articulate here, it is straightforward to compute imaginary-time correlators from the measured frequency dependence of (real-time) response functions. In addition to facilitating comparison between theory and experiment, the proposed approach can be useful in extracting certain aspects of the (long-time relaxational) dynamics from a complex data set. We illustrate this with an analysis of the nematic response inferred from Raman scattering spectroscopy on the iron-based superconductor Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$, which includes a new method for identifying a putative quantum critical contribution to that response. |
| Databáze: |
arXiv |
| Externí odkaz: |
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