| Title: |
Experimental validation of electron correlation models in warm dense matter |
| Authors: |
Bespalov, Dmitrii; Zastrau, Ulf; Moldabekov, Zhandos; Gawne, Thomas; Dornheim, Tobias; Meshhal, Moyassar; Amouretti, Alexis; Andrzejewski, Michal; Appel, Karen; Baehtz, Carsten; Brambrink, Erik; Buakor, Khachiwan; Camarda, Carolina; Chin, David; Collins, Gilbert; Crepisson, Celine; Descamps, Adrien; Eggert, Jon; Fletcher, Luke; Forte, Alessandro; Gregori, Gianluca; Harmand, Marion; Humphries, Oliver; Hoeppner, Hauke; Kuhlke, Jonas; Lynn, William; Luetgert, Julian; Masruri, Masruri; Mcbride, Emma; Mcwilliams, Ryan Stewart; Mora, Alan Augusto Sanjuan; Naedler, Jean-Paul; Neumayer, Paul; Palmer, Charlotte; Pelka, Alexander; Pennacchioni, Lea; Polsin, Danae; Prestwood, Calum; Pukhareva, Natalia; Qu, Chongbing; Ranjan, Divyanshu; Redmer, Ronald; Roeper, Michael; Sahle, Christoph; Schumacher, Samuel; Schwinkendorf, Jan-Patrick; Sieber, Melanie; Singleton, Madison; Smith, Ethan; Sternemann, Christian; Stevens, Thomas; Stevenson, Michael; Strohm, Cornelius; Tang, Minxue; Toncian, Monika; Toncian, Toma; Tschentscher, Thomas; Vinko, Sam; Wark, Justin; Wilke, Max; Kraus, Dominik; Preston, Thomas |
| Contributors: |
European X-Ray Free-Electron Laser (XFEL); University of Rostock = Universität Rostock; Center for Advanced Systems Understanding Görlitz (CASUS); Helmholtz-Zentrum Dresden-Rossendorf (HZDR); European Synchrotron Radiation Facility Grenoble (ESRF); The University of Osaka (UOsaka); European XFEL Gmbh; Skane University Hospital Lund; University of Rochester USA; Clarendon Laboratory Oxford; University of Oxford; SLAC National Accelerator Laboratory (SLAC); Stanford University; Queen's University Belfast (QUB); Lawrence Livermore National Laboratory (LLNL); Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM); Conservatoire National des Arts et Métiers Cnam (Cnam)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies; The University of Edinburgh; GSI Helmholtzzentrum für Schwerionenforschung (GSI); Institut für Geowissenschaften Potsdam; University of Potsdam = Universität Potsdam; Ruhr University Bochum = Ruhr-Universität Bochum Bochum (RUB); Institut für Physik Rostock; Deutsches Elektronen-Synchrotron Hamburg (DESY); Laboratory for lasers energetics - LLE (New-York, USA); Technische Universität Dortmund Dortmund (TU); European Project: 101076233,ERC-2022-STG,ERC-2022-STG,PREXTREME(2023) |
| Source: |
https://hal.science/hal-05404967 ; 2025. |
| Publisher Information: |
CCSD |
| Publication Year: |
2025 |
| Subject Terms: |
Plasma Physics (physics.plasm-ph); Strongly Correlated Electrons (cond-mat.str-el); FOS: Physical sciences; [PHYS]Physics [physics]; [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
| Description: |
We report X-ray Thomson scattering measurements of warm dense aluminium at densities 3.75-4.5 g/cm$^3$ and a temperature of approximately 0.6 eV, performed at the HED-HiBEF instrument of the European XFEL using the DiPOLE-100X drive laser. By probing plasmon dispersion across momentum transfers $k$ = 0.99-2.57 Angstrom$^{-1}$ with high statistical fidelity, we directly test competing theories of electron dynamics under extreme conditions. Time-dependent density functional theory (TDDFT) reproduces both the observed plasmon energies and spectral shapes across the full $k$ range, whereas the random phase approximation (RPA) and static local-field-correction (LFC) models systematically overestimate the plasmon frequency, even for aluminium (a canonical uniform electron gas metal). Considering electron localisation around ions and the loss of crystalline symmetry due to liquid-state disorder, our measurements provide direct evidence that simple uniform electron gas models fail in warm dense matter and establish TDDFT as a reliable approach for electronic correlations in this regime. |
| Document Type: |
report |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/arxiv/2509.10107; info:eu-repo/grantAgreement//101076233/EU/Predicting the Extreme/PREXTREME; ARXIV: 2509.10107 |
| Availability: |
https://hal.science/hal-05404967; https://hal.science/hal-05404967v1/document; https://hal.science/hal-05404967v1/file/Bespalov_2025.pdf |
| Rights: |
https://about.hal.science/hal-authorisation-v1/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.D69E9FC6 |
| Database: |
BASE |