Manmana, Salvatore R.

[["dc.bibliographiccitation.artnumber","241109"],["dc.bibliographiccitation.issue","24"],["dc.bibliographiccitation.journal","Physical Review. B"],["dc.bibliographiccitation.volume","93"],["dc.contributor.author","Klyushina, E. S."],["dc.contributor.author","Tiegel, Alexander C."],["dc.contributor.author","Fauseweh, B."],["dc.contributor.author","Islam, A. T. M. N."],["dc.contributor.author","Park, J. T."],["dc.contributor.author","Klemke, B."],["dc.contributor.author","Honecker, Andreas"],["dc.contributor.author","Uhrig, G. S."],["dc.contributor.author","Manmana, Salvatore R."],["dc.contributor.author","Lake, Benjamin R. M."],["dc.date.accessioned","2018-11-07T10:12:42Z"],["dc.date.available","2018-11-07T10:12:42Z"],["dc.date.issued","2016"],["dc.description.abstract","Unlike most quantum systems which rapidly become incoherent as temperature is raised, strong correlations persist at elevated temperatures in S = 1/2 dimermagnets, as revealed by the unusual asymmetric line shape of their excitations at finite temperatures. Here, we quantitatively explore and parametrize the strongly correlated magnetic excitations at finite temperatures using high-resolution inelastic neutron scattering of the model compound BaCu2V2O8 which we show to be an alternating antiferromagnetic-ferromagnetic spin-1/2 chain. Comparison to state of the art computational techniques shows excellent agreement over a wide temperature range. Our findings hence demonstrate the possibility to quantitatively predict coherent behavior at elevated temperatures in quantum magnets."],["dc.identifier.doi","10.1103/PhysRevB.93.241109"],["dc.identifier.isi","000378106400002"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40289"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area B | B03 Relaxation, Thermalisierung, Transport und Kondensation in hochangeregten Festkörpern"],["dc.relation.issn","2469-9969"],["dc.relation.issn","2469-9950"],["dc.title","Magnetic excitations in the S=1/2 antiferromagnetic-ferromagnetic chain compound BaCu2V2O8 at zero and finite temperature"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","060406"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Physical Review. B"],["dc.bibliographiccitation.volume","90"],["dc.contributor.author","Tiegel, Alexander C."],["dc.contributor.author","Manmana, Salvatore R."],["dc.contributor.author","Pruschke, Thomas"],["dc.contributor.author","Honecker, Andreas"],["dc.date.accessioned","2018-11-07T09:36:28Z"],["dc.date.available","2018-11-07T09:36:28Z"],["dc.date.issued","2014"],["dc.description.abstract","We present a flexible density-matrix renormalization group approach to calculate finite-temperature spectral functions of one-dimensional strongly correlated quantum systems. The method combines the purification of the finite-temperature density operator with a moment expansion of the Green's function. Using this approach, we study finite-temperature properties of dynamical spectral functions of spin-1/2 XXZ chains with Dzyaloshinskii-Moriya interactions in magnetic fields and analyze the effect of these symmetry breaking interactions on the nature of the finite-temperature dynamic spin structure factor."],["dc.identifier.doi","10.1103/PhysRevB.90.060406"],["dc.identifier.isi","000341164800004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32626"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area B | B03 Relaxation, Thermalisierung, Transport und Kondensation in hochangeregten Festkörpern"],["dc.relation.issn","2469-9969"],["dc.relation.issn","2469-9950"],["dc.title","Matrix product state formulation of frequency-space dynamics at finite temperatures"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","104411"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Physical Review B"],["dc.bibliographiccitation.volume","93"],["dc.contributor.author","Tiegel, Alexander C."],["dc.contributor.author","Honecker, Andreas"],["dc.contributor.author","Pruschke, Thomas"],["dc.contributor.author","Ponomaryov, Alexey"],["dc.contributor.author","Zvyagin, Sergei A."],["dc.contributor.author","Feyerherm, Ralf"],["dc.contributor.author","Manmana, Salvatore R."],["dc.date.accessioned","2020-12-10T18:20:24Z"],["dc.date.available","2020-12-10T18:20:24Z"],["dc.date.issued","2016"],["dc.description.abstract","The material copper pyrimidine dinitrate (Cu-PM) is a quasi-one-dimensional spin system described by the spin-1/2 XXZ Heisenberg antiferromagnet with Dzyaloshinskii-Moriya interactions. Based on numerical results obtained by the density-matrix renormalization group, exact diagonalization, and accompanying electron spin resonance (ESR) experiments we revisit the spin dynamics of this compound in an applied magnetic field. Our calculations for momentum and frequency-resolved dynamical quantities give direct access to the intensity of the elementary excitations at both zero and finite temperature. This allows us to study the system beyond the low-energy description by the quantum sine-Gordon model. We find a deviation from the Lorentz invariant dispersion for the single-soliton resonance. Furthermore, our calculations only confirm the presence of the strongest boundary bound state previously derived from a boundary sine-Gordon field theory, while composite boundary-bulk excitations have too low intensities to be observable. Upon increasing the temperature, we find a temperature-induced crossover of the soliton and the emergence of new features, such as interbreather transitions. The latter observation is confirmed by our ESR experiments on Cu-PM over a wide range of the applied field."],["dc.identifier.doi","10.1103/PhysRevB.93.104411"],["dc.identifier.eissn","2469-9969"],["dc.identifier.isi","000372404400004"],["dc.identifier.issn","2469-9950"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75551"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area B | B03 Relaxation, Thermalisierung, Transport und Kondensation in hochangeregten Festkörpern"],["dc.relation.issn","2469-9969"],["dc.relation.issn","2469-9950"],["dc.title","Dynamical properties of the sine-Gordon quantum spin magnet Cu-PM at zero and finite temperature"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Physical Review. B"],["dc.bibliographiccitation.volume","96"],["dc.contributor.author","Becker, Jonas"],["dc.contributor.author","Köhler, Thomas"],["dc.contributor.author","Tiegel, Alexander C."],["dc.contributor.author","Manmana, Salvatore R."],["dc.contributor.author","Wessel, Stefan"],["dc.contributor.author","Honecker, Andreas"],["dc.date.accessioned","2020-12-10T18:25:04Z"],["dc.date.available","2020-12-10T18:25:04Z"],["dc.date.issued","2017"],["dc.description.abstract","The antiferromagnetic spin-one chain is considerably one of the most fundamental quantum many-body systems, with symmetry protected topological order in the ground state. Here, we present results for its dynamical spin structure factor at finite temperatures, based on a combination of exact numerical diagonalization, matrix-product-state calculations and quantum Monte Carlo simulations. Open finite chains exhibit a sub-gap band in the thermal spectral functions, indicative of localized edge-states. Moreover, we observe the thermal activation of a distinct low-energy continuum contribution to the spin spectral function with an enhanced spectral weight at low momenta and its upper threshold. This emerging thermal spectral feature of the Haldane spin-one chain is shown to result from intra-band magnon scattering due to the thermal population of the single-magnon branch, which features a large bandwidth-to-gap ratio. These findings are discussed with respect to possible future studies on spin-one chain compounds based on inelastic neutron scattering."],["dc.identifier.arxiv","1703.04652v2"],["dc.identifier.doi","10.1103/PhysRevB.96.060403"],["dc.identifier.eissn","2469-9969"],["dc.identifier.issn","2469-9950"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75567"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area B | B03 Relaxation, Thermalisierung, Transport und Kondensation in hochangeregten Festkörpern"],["dc.relation.issn","2469-9950"],["dc.relation.issn","2469-9969"],["dc.title","Finite-Temperature Dynamics and Thermal Intraband Magnon Scattering in Haldane Spin-One Chains"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]