Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102479
Title: Nonfrustrated interlayer order and its relevance to the bose-einstein condensation of magnons in BaCuSi 2 O 6
Authors: Mazurenko, V. V.
Valentyuk, M. V.
Stern, R.
Tsirlin, A. A.
Issue Date: 2014
Publisher: American Physical Society
Citation: Nonfrustrated interlayer order and its relevance to the bose-einstein condensation of magnons in BaCuSi 2 O 6 / V. V. Mazurenko, M. V. Valentyuk, R. Stern, et al. — DOI 10.1103/PhysRevLett.112.107202 // Physical Review Letters. — 2014. — Vol. 112. — Iss. 10. — 107202.
Abstract: Han purple (BaCuSi2O6) is not only an ancient pigment, but also a valuable model material for studying Bose-Einstein condensation of magnons in high magnetic fields. Using precise low-temperature structural data and extensive density-functional calculations, we elucidate magnetic couplings in this compound. The resulting magnetic model comprises two types of nonequivalent spin dimers, in excellent agreement with the Cu63,65 nuclear magnetic resonance data. We further argue that leading interdimer couplings connect the upper site of one dimer to the bottom site of the contiguous dimer, and not the upper-to-upper and bottom-to-bottom sites, as assumed previously. This finding is verified by inelastic neutron scattering data and implies the lack of frustration between the layers of spin dimers in BaCuSi2O6, thus challenging existing theories of the two-dimensional-like Bose-Einstein condensation of magnons in this compound. © 2014 American Physical Society.
Keywords: MAGNETIC COUPLINGS
DENSITY-FUNCTIONAL CALCULATIONS
HIGH MAGNETIC FIELDS
INTERDIMER COUPLING
LOW TEMPERATURES
MAGNETIC MODELING
MODEL MATERIALS
NUCLEAR MAGNETIC RESONANCE DATA
STRUCTURAL DATA
BOSE-EINSTEIN CONDENSATION
URI: http://hdl.handle.net/10995/102479
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 84896346731
PURE ID: 336297
5c40e76a-a092-4069-86c5-ef10935edbbf
ISSN: 319007
DOI: 10.1103/PhysRevLett.112.107202
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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