dc.contributor.author
Buessen, Finn Lasse
dc.contributor.author
Noculak, Vincent
dc.contributor.author
Trebst, Simon
dc.contributor.author
Reuther, Johannes
dc.date.accessioned
2020-03-03T10:35:24Z
dc.date.available
2020-03-03T10:35:24Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/26817
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-26575
dc.description.abstract
In the field of quantum magnetism, the advent of numerous spin-orbit assisted Mott insulating compounds, such as the family of Kitaev materials, has led to a growing interest in studying general spin models with nondiagonal interactions that do not retain the SU(2) invariance of the underlying spin degrees of freedom. However, the exchange frustration arising from these nondiagonal and often bond-directional interactions for two- and three-dimensional lattice geometries poses a serious challenge for numerical many-body simulation techniques. In this paper, we present an extended formulation of the pseudofermion functional renormalization group that is capable of capturing the physics of frustrated quantum magnets with generic (diagonal and off-diagonal) two-spin interaction terms. Based on a careful symmetry analysis of the underlying flow equations, we reveal that the computational complexity grows only moderately, as compared to models with only diagonal interaction terms. We apply the formalism to a kagome antiferromagnet which is augmented by general in-plane and out-of-plane Dzyaloshinskii-Moriya (DM) interactions, as argued to be present in the spin liquid candidate material herbertsmithite. We calculate the complete ground state phase diagram in the strength of in-plane and out-of-plane DM couplings, and discuss the extended stability of the spin liquid of the unperturbed kagome antiferromagnet in the presence of these couplings.
en
dc.format.extent
20 Seiten
dc.rights.uri
http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen
dc.subject
frustrated magnetism
en
dc.subject
quantum spin liquid
en
dc.subject
Kagome lattice
en
dc.subject
strongly correlated systems
en
dc.subject
functional renormalization group
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik::530 Physik
dc.title
Functional renormalization group for frustrated magnets with nondiagonal spin interactions
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
125164
dcterms.bibliographicCitation.doi
10.1103/PhysRevB.100.125164
dcterms.bibliographicCitation.journaltitle
Physical review
dcterms.bibliographicCitation.number
12
dcterms.bibliographicCitation.volume
100
dcterms.bibliographicCitation.url
https://doi.org/10.1103/PhysRevB.100.125164
refubium.affiliation
Physik
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.issn
2469-9950
dcterms.isPartOf.eissn
2469-9969