Matches in SemOpenAlex for { <https://semopenalex.org/work/W2038077381> ?p ?o ?g. }
Showing items 1 to 80 of
80
with 100 items per page.
- W2038077381 endingPage "15244" @default.
- W2038077381 startingPage "15231" @default.
- W2038077381 abstract "We consider a chain of localized spins, coupled to phonons. Recently this problem has been solved exactly for a ``basic model,'' a family of spin-phonon Hamiltonians ${mathit{H}}_{mathrm{BM}}$ characterized by one parameter (coupling constant K), and a zero-T first-order phase transition from the magnetic (ferro or antiferro) state at low couplings to the nonmagnetic state with a phonon density wave at high couplings was found. Here we probe the general case, constructing an effective Hamiltonian H for low-energy degrees of freedom by means of regular expansion in deviations ensuremath{delta}H=H-${mathit{H}}_{mathrm{BM}}$ of the general Hamiltonian H from that of the basic model. In linear approximation in ensuremath{delta}H the problem appears to be exactly solvable as well, due to an infinite number of conservation laws. If K is far enough from the critical value ${mathit{K}}_{mathit{c}}$, then the character of the basic model solution is not altered. In the vicinity of ${mathit{K}}_{mathit{c}}$ the magnetic state is dramatically reconstructed: Here the ground state is a gapless magnetic quantum liquid, consisting of mobile singlet spin-phonon complexes and unbound spins. The fraction of singlets increases gradually upon approaching ${mathit{K}}_{mathit{c}}$, and the magnetic order parameter gradually vanishes. Thus we have here a partial screening of spins by phonons without formation of a phonon density wave. The latter appears only at K=${mathit{K}}_{mathit{c}}$ in the first-order phase transition. Corrections, quadratic in ensuremath{delta}H, destroy the integrability of the system, but outside a narrow critical region around ${mathit{K}}_{mathit{c}}$ they only lead to an opening of a small gap in the spectrum of the quantum liquid. The behavior of the system within the critical region is an open question. Most likely the continuous magnetic phase transition at K=${mathit{K}}_{mathit{c}}$ becomes a first-order one, but close to second order. The relevance of our results for three-dimensional systems and possible applications to compounds with anomalously weak magnetism are briefly discussed. textcopyright{} 1996 The American Physical Society." @default.
- W2038077381 created "2016-06-24" @default.
- W2038077381 creator A5083576705 @default.
- W2038077381 date "1996-06-01" @default.
- W2038077381 modified "2023-09-26" @default.
- W2038077381 title "Quantum-liquid regimes for spin chains coupled to phonons: Phonon density wave versus magnetic order" @default.
- W2038077381 cites W1643951543 @default.
- W2038077381 cites W1977466450 @default.
- W2038077381 cites W1986977896 @default.
- W2038077381 cites W2003523870 @default.
- W2038077381 cites W2004773940 @default.
- W2038077381 cites W2018388532 @default.
- W2038077381 cites W2039298551 @default.
- W2038077381 cites W2048765359 @default.
- W2038077381 cites W2049285314 @default.
- W2038077381 cites W2065675569 @default.
- W2038077381 cites W2069349354 @default.
- W2038077381 cites W2069708348 @default.
- W2038077381 cites W2096345372 @default.
- W2038077381 cites W4253674992 @default.
- W2038077381 doi "https://doi.org/10.1103/physrevb.53.15231" @default.
- W2038077381 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/9983320" @default.
- W2038077381 hasPublicationYear "1996" @default.
- W2038077381 type Work @default.
- W2038077381 sameAs 2038077381 @default.
- W2038077381 citedByCount "0" @default.
- W2038077381 crossrefType "journal-article" @default.
- W2038077381 hasAuthorship W2038077381A5083576705 @default.
- W2038077381 hasConcept C10138342 @default.
- W2038077381 hasConcept C121332964 @default.
- W2038077381 hasConcept C126255220 @default.
- W2038077381 hasConcept C130787639 @default.
- W2038077381 hasConcept C162324750 @default.
- W2038077381 hasConcept C181500209 @default.
- W2038077381 hasConcept C182306322 @default.
- W2038077381 hasConcept C183276030 @default.
- W2038077381 hasConcept C24169881 @default.
- W2038077381 hasConcept C26873012 @default.
- W2038077381 hasConcept C2778870898 @default.
- W2038077381 hasConcept C33062035 @default.
- W2038077381 hasConcept C33923547 @default.
- W2038077381 hasConcept C62520636 @default.
- W2038077381 hasConcept C69523127 @default.
- W2038077381 hasConceptScore W2038077381C10138342 @default.
- W2038077381 hasConceptScore W2038077381C121332964 @default.
- W2038077381 hasConceptScore W2038077381C126255220 @default.
- W2038077381 hasConceptScore W2038077381C130787639 @default.
- W2038077381 hasConceptScore W2038077381C162324750 @default.
- W2038077381 hasConceptScore W2038077381C181500209 @default.
- W2038077381 hasConceptScore W2038077381C182306322 @default.
- W2038077381 hasConceptScore W2038077381C183276030 @default.
- W2038077381 hasConceptScore W2038077381C24169881 @default.
- W2038077381 hasConceptScore W2038077381C26873012 @default.
- W2038077381 hasConceptScore W2038077381C2778870898 @default.
- W2038077381 hasConceptScore W2038077381C33062035 @default.
- W2038077381 hasConceptScore W2038077381C33923547 @default.
- W2038077381 hasConceptScore W2038077381C62520636 @default.
- W2038077381 hasConceptScore W2038077381C69523127 @default.
- W2038077381 hasIssue "22" @default.
- W2038077381 hasLocation W20380773811 @default.
- W2038077381 hasLocation W20380773812 @default.
- W2038077381 hasOpenAccess W2038077381 @default.
- W2038077381 hasPrimaryLocation W20380773811 @default.
- W2038077381 hasRelatedWork W1576507461 @default.
- W2038077381 hasRelatedWork W1990639217 @default.
- W2038077381 hasRelatedWork W2002627415 @default.
- W2038077381 hasRelatedWork W2011861756 @default.
- W2038077381 hasRelatedWork W2037921831 @default.
- W2038077381 hasRelatedWork W2052334060 @default.
- W2038077381 hasRelatedWork W2064788772 @default.
- W2038077381 hasRelatedWork W2072255706 @default.
- W2038077381 hasRelatedWork W2328549053 @default.
- W2038077381 hasRelatedWork W2969622676 @default.
- W2038077381 hasVolume "53" @default.
- W2038077381 isParatext "false" @default.
- W2038077381 isRetracted "false" @default.
- W2038077381 magId "2038077381" @default.
- W2038077381 workType "article" @default.