Photo-emission signatures of coherence breakdown in Kondo alloys: dynamical mean-field theory approach
| hal.structure.identifier | Laboratoire Ondes et Matière d'Aquitaine [LOMA] | |
| dc.contributor.author | POUDEL, Bishal | |
| hal.structure.identifier | Théorie de la Matière Condensée [NEEL - TMC] | |
| dc.contributor.author | LACROIX, Claudine | |
| hal.structure.identifier | Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig] | |
| dc.contributor.author | ZWICKNAGL, Gertrud | |
| hal.structure.identifier | Laboratoire Ondes et Matière d'Aquitaine [LOMA] | |
| dc.contributor.author | BURDIN, Sébastien | |
| dc.date.issued | 2021 | |
| dc.identifier.issn | 1367-2630 | |
| dc.description.abstractEn | We study the Kondo alloy model on a square lattice using dynamical meanfield theory (DMFT) for Kondo substitution and disorder effects, together with static mean-field approximations. We computed and analyzed photoemission properties as a function of electronic filling nc , Kondo impurity concentration x, and strength of Kondo temperature TK. We provide a complete description of the Angle Resolved Photoemission Spectroscopy (ARPES) signals expected in the paramagnetic Kondo phases. By analyzing the Fermi surface, we observe the Liftshitz-like transition predicted previously for strong TK at x = nc and we discuss the evolution of the dispersion from the dense coherent to the dilute Kondo regimes. At smaller TK , we find that this transition marking the breakdown of coherence at x = nc becomes a crossover. However, we identify another transition at a smaller concentration x where the effective mass continuously vanishes. x separates the one-branch and the twobranches ARPES dispersions characterizing respectively dilute and dense Kondo paramagnetic regimes. The x − TK phase diagrams are also described, suggesting that the transition at x might be experimentally observable since magnetically ordered phases are stabilized at much lower TK. Fermi surface reconstructions in antiferromagnetic and ferromagnetic phases are also discussed. | |
| dc.description.sponsorship | Topologie de surfaces de Fermi et émergence de nouveaux états électroniques dans des systèmes fortement corrélés - ANR-16-CE92-0018 | |
| dc.language.iso | en | |
| dc.publisher | Institute of Physics: Open Access Journals | |
| dc.subject.en | Liftshitz transition | |
| dc.subject.en | angle resolved photoemission spectroscopy | |
| dc.subject.en | coherence breakdown | |
| dc.subject.en | disordered Kondo alloys | |
| dc.subject.en | heavy-fermion | |
| dc.subject.en | dynamical mean-field theory | |
| dc.subject.en | phase transitions | |
| dc.title.en | Photo-emission signatures of coherence breakdown in Kondo alloys: dynamical mean-field theory approach | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1088/1367-2630/ac06e8 | |
| dc.subject.hal | Physique [physics]/Matière Condensée [cond-mat] | |
| bordeaux.journal | New Journal of Physics | |
| bordeaux.page | 063073 | |
| bordeaux.volume | 23 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-03159923 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-03159923v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=New%20Journal%20of%20Physics&rft.date=2021&rft.volume=23&rft.spage=063073&rft.epage=063073&rft.eissn=1367-2630&rft.issn=1367-2630&rft.au=POUDEL,%20Bishal&LACROIX,%20Claudine&ZWICKNAGL,%20Gertrud&BURDIN,%20S%C3%A9bastien&rft.genre=article |
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