Matches in SemOpenAlex for { <https://semopenalex.org/work/W2094133359> ?p ?o ?g. }
Showing items 1 to 77 of
77
with 100 items per page.
- W2094133359 endingPage "5978" @default.
- W2094133359 startingPage "5966" @default.
- W2094133359 abstract "The temperature dependence of the spin susceptibility ensuremath{chi}(T) is studied in a weakly disordered itinerant-fermion system close to a magnetic instability. The paramagnon model is used with a Hubbard-type contact repulsion among opposite spins, with the Stoner enhancement of the pure system (1-ifmmode bar{I}else ={I}fi{}${)}^{mathrm{ensuremath{-}}1}$ensuremath{gg}1. The result is shown to be different from the usual one obtained in the case of a screened Coulomb interaction: The 2-phDP (two--particle-hole-diffusion-propagator) diagrams, which cancel altogether in the Coulomb interaction case, are shown to give, here, for the contact interaction, a finite contribution which is of the same order in (${ensuremath{varepsilon}}_{F}$ensuremath{tau}${)}^{mathrm{ensuremath{-}}1}$ as the 3-phDP and 4-phDP diagrams where ensuremath{tau} is the lifetime due to disorder, and ${ensuremath{varepsilon}}_{F}$ the Fermi energy. Instead of a unique temperature range Tensuremath{tau}ensuremath{ll}1 in the Coulomb case, here one has to distinguish two ranges:When Tensuremath{tau}ensuremath{ll}(1-ifmmode bar{I}else ={I}fi{}), the usual 3- and 4-phDP diagrams dominate and one recovers ensuremath{chi}(T)ensuremath{approxeq} ensuremath{surd}Tensuremath{tau} /(1-ifmmode bar{I}else ={I}fi{}${)}^{2}$ as was first announced by Al'tshuler and Aronov; but when (1-ifmmode bar{I}else ={I}fi{})ensuremath{ll}1, the 2-phDP diagrams dominate, yielding ensuremath{chi}(T)ensuremath{sim}(Tensuremath{tau}${)}^{3/2}$/(1-ifmmode bar{I}else ={I}fi{}${)}^{5/2}$, which is non-negligible near the magnetic instability. At T=0, the 2-phDP diagrams definitely dominate as they enhance the effective interaction (I${ifmmodebarelsetextasciimacronfi{}}_{mathrm{eff}}$-ifmmode bar{I}else ={I}fi{})ensuremath{approxeq}(${ensuremath{varepsilon}}_{F}$ensuremath{tau}${)}^{mathrm{ensuremath{-}}2}$(1 -ifmmode bar{I}else ={I}fi{}${)}^{mathrm{ensuremath{-}}1/2}$ and let the system be closer to magnetism, while the 3- and 4-phDP diagrams play a minor role at 0 K. The present study accounts only for phDP processes.Effects due to ppDP's (particle-particle diffusion propagators) should also be studied within the same framework to incorporate the contributions of the 2-ppDP diagrams. Finally, the latest developments using renormalization-group analysis of Finkel'stein and of Castellani et al. with a screened Coulomb interaction ought to be modified to account for the contact-interaction case where spin constraints yield the noncancellation of the 2-phDP---and also most likely of the 2-ppDP---diagrams." @default.
- W2094133359 created "2016-06-24" @default.
- W2094133359 creator A5021850634 @default.
- W2094133359 date "1985-11-01" @default.
- W2094133359 modified "2023-10-14" @default.
- W2094133359 title "Spin susceptibility in three-dimensional nearly magnetic disordered fermion systems in the weakly localized regime" @default.
- W2094133359 cites W1967985280 @default.
- W2094133359 cites W1971194904 @default.
- W2094133359 cites W2005560627 @default.
- W2094133359 cites W2011097365 @default.
- W2094133359 cites W2020024544 @default.
- W2094133359 cites W2035873663 @default.
- W2094133359 cites W2047282494 @default.
- W2094133359 cites W2056259100 @default.
- W2094133359 cites W2057286604 @default.
- W2094133359 cites W2062910717 @default.
- W2094133359 cites W2066449662 @default.
- W2094133359 cites W2074533833 @default.
- W2094133359 cites W2314626435 @default.
- W2094133359 doi "https://doi.org/10.1103/physrevb.32.5966" @default.
- W2094133359 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/9937844" @default.
- W2094133359 hasPublicationYear "1985" @default.
- W2094133359 type Work @default.
- W2094133359 sameAs 2094133359 @default.
- W2094133359 citedByCount "6" @default.
- W2094133359 crossrefType "journal-article" @default.
- W2094133359 hasAuthorship W2094133359A5021850634 @default.
- W2094133359 hasConcept C10138342 @default.
- W2094133359 hasConcept C104416048 @default.
- W2094133359 hasConcept C106074065 @default.
- W2094133359 hasConcept C121332964 @default.
- W2094133359 hasConcept C147120987 @default.
- W2094133359 hasConcept C162324750 @default.
- W2094133359 hasConcept C182306322 @default.
- W2094133359 hasConcept C26873012 @default.
- W2094133359 hasConcept C42704618 @default.
- W2094133359 hasConcept C52233224 @default.
- W2094133359 hasConcept C54101563 @default.
- W2094133359 hasConcept C62520636 @default.
- W2094133359 hasConcept C9342510 @default.
- W2094133359 hasConcept C97355855 @default.
- W2094133359 hasConceptScore W2094133359C10138342 @default.
- W2094133359 hasConceptScore W2094133359C104416048 @default.
- W2094133359 hasConceptScore W2094133359C106074065 @default.
- W2094133359 hasConceptScore W2094133359C121332964 @default.
- W2094133359 hasConceptScore W2094133359C147120987 @default.
- W2094133359 hasConceptScore W2094133359C162324750 @default.
- W2094133359 hasConceptScore W2094133359C182306322 @default.
- W2094133359 hasConceptScore W2094133359C26873012 @default.
- W2094133359 hasConceptScore W2094133359C42704618 @default.
- W2094133359 hasConceptScore W2094133359C52233224 @default.
- W2094133359 hasConceptScore W2094133359C54101563 @default.
- W2094133359 hasConceptScore W2094133359C62520636 @default.
- W2094133359 hasConceptScore W2094133359C9342510 @default.
- W2094133359 hasConceptScore W2094133359C97355855 @default.
- W2094133359 hasIssue "9" @default.
- W2094133359 hasLocation W20941333591 @default.
- W2094133359 hasLocation W20941333592 @default.
- W2094133359 hasOpenAccess W2094133359 @default.
- W2094133359 hasPrimaryLocation W20941333591 @default.
- W2094133359 hasRelatedWork W1995123328 @default.
- W2094133359 hasRelatedWork W2013311337 @default.
- W2094133359 hasRelatedWork W2036201935 @default.
- W2094133359 hasRelatedWork W2051509264 @default.
- W2094133359 hasRelatedWork W2074405136 @default.
- W2094133359 hasRelatedWork W2076810589 @default.
- W2094133359 hasRelatedWork W2163085578 @default.
- W2094133359 hasRelatedWork W2323491721 @default.
- W2094133359 hasRelatedWork W2809422739 @default.
- W2094133359 hasRelatedWork W3090826332 @default.
- W2094133359 hasVolume "32" @default.
- W2094133359 isParatext "false" @default.
- W2094133359 isRetracted "false" @default.
- W2094133359 magId "2094133359" @default.
- W2094133359 workType "article" @default.