Electronic structure of Pr(2-x)CexCuO(4) studied via ARPES and LDA plus DMFT+Sigma(k)
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
The electron-doped Pr2-xCexCuO4 (PCCO) compound in the pseudogap regime (x approximate to 0.15) was investigated using the angle-resolved photoemission spectroscopy and the generalized dynamical mean-field theory (DMFT) with the k-dependent self-energy (LDA+DMFT+Sigma(k)). Model parameters (hopping integral values and local Coulomb interaction strength) for the effective one-band Hubbard model were calculated by the local-density approximation (LDA) with numerical renormalization-group method employed as an "impurity solver" in DMFT computations. An "external" k-dependent self-energy Sigma(k) was used to describe interaction of correlated conducting electrons with short-range antiferromagnetic (AFM) pseudogap fluctuations. Both experimental and theoretical spectral functions and Fermi surfaces were obtained and compared demonstrating a good semiquantitative agreement. For both experiment and theory normal-state spectra of nearly optimally doped PCCO show clear evidence for a pseudogap state with AFM-like nature. Namely, folding of quasiparticle bands as well as the presence of the "hot spots" and "Fermi arcs" was observed.
Details
Originalsprache | Englisch |
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Aufsatznummer | 140510 |
Seitenumfang | 4 |
Fachzeitschrift | Physical Review B |
Jahrgang | 80 |
Ausgabenummer | 14 |
Publikationsstatus | Veröffentlicht - Okt. 2009 |
Peer-Review-Status | Ja |
Extern publiziert | Ja |
Externe IDs
Scopus | 71249089526 |
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ORCID | /0000-0002-2438-0672/work/142253068 |
Schlagworte
Schlagwörter
- HIGH-TEMPERATURE SUPERCONDUCTORS, RENORMALIZATION-GROUP APPROACH, DILUTE MAGNETIC-ALLOYS, ANDERSON MODEL, CUPRATE SUPERCONDUCTORS, PSEUDOGAP BEHAVIOR, STATIC PROPERTIES, DENSITY, PHASE, FLUCTUATIONS