Matches in SemOpenAlex for { <https://semopenalex.org/work/W4307929897> ?p ?o ?g. }
Showing items 1 to 55 of
55
with 100 items per page.
- W4307929897 abstract "Ultracold Fermi gases with synthetic gauge field represent an excellent platform to study the combined effect of lattice frustration and an effective magnetic flux close to one flux quantum per particle. The minimal theoretical model to accomplish this task is a system of spinless noninteracting fermions on a triangular two-chain flux ladder. In this paper we consider this model close to half-filling, with interchain hopping amplitudes alternating along the zigzag bonds of the ladder and being small. In such setting qualitative changes in the ground state properties of the model, most notably the flux-induced topological Lifshitz transitions are shifted towards the values of the flux per a diatomic plaquette ($f$) close to the flux quantum ($fsim 1/2$). Geometrical frustration of the lattice breaks the $k to pi - k$ particle-hole spectral symmetry present in non-frustrated ladders, and leads to splitting of the degeneracies at metal-insulator transitions. A remarkable feature of a translationally invariant triangular ladder is the appearance of isolated Dirac node at the Brillouin zone boundary, rendering the ground state at $f=1/2$ semi-metallic. We calculate the flux dependence of the orbital current and identify Lifshitz critical points by the singularities in this dependence at a constant chemical potential $mu$ and constant particle density $rho$. The absence of the particle-hole symmetry in the triangular ladder leads to the asymmetry between particle ($rho>1$) and hole ($rho<1$) doping and to qualitatively different results for the phase diagram, Lifshitz points and the flux dependence of the orbital current in the settings $rho={rm const}$ and $mu={rm const}$." @default.
- W4307929897 created "2022-11-06" @default.
- W4307929897 creator A5051238688 @default.
- W4307929897 creator A5053497740 @default.
- W4307929897 date "2022-10-30" @default.
- W4307929897 modified "2023-10-16" @default.
- W4307929897 title "Spectrum, Lifshitz transitions and orbital currents in frustrated fermionic ladders with a uniform flux" @default.
- W4307929897 doi "https://doi.org/10.48550/arxiv.2210.16814" @default.
- W4307929897 hasPublicationYear "2022" @default.
- W4307929897 type Work @default.
- W4307929897 citedByCount "0" @default.
- W4307929897 crossrefType "posted-content" @default.
- W4307929897 hasAuthorship W4307929897A5051238688 @default.
- W4307929897 hasAuthorship W4307929897A5053497740 @default.
- W4307929897 hasBestOaLocation W43079298971 @default.
- W4307929897 hasConcept C115260700 @default.
- W4307929897 hasConcept C121332964 @default.
- W4307929897 hasConcept C155355069 @default.
- W4307929897 hasConcept C157479481 @default.
- W4307929897 hasConcept C16291881 @default.
- W4307929897 hasConcept C198487127 @default.
- W4307929897 hasConcept C26873012 @default.
- W4307929897 hasConcept C38710091 @default.
- W4307929897 hasConcept C39197057 @default.
- W4307929897 hasConcept C62520636 @default.
- W4307929897 hasConcept C69523127 @default.
- W4307929897 hasConcept C90626534 @default.
- W4307929897 hasConceptScore W4307929897C115260700 @default.
- W4307929897 hasConceptScore W4307929897C121332964 @default.
- W4307929897 hasConceptScore W4307929897C155355069 @default.
- W4307929897 hasConceptScore W4307929897C157479481 @default.
- W4307929897 hasConceptScore W4307929897C16291881 @default.
- W4307929897 hasConceptScore W4307929897C198487127 @default.
- W4307929897 hasConceptScore W4307929897C26873012 @default.
- W4307929897 hasConceptScore W4307929897C38710091 @default.
- W4307929897 hasConceptScore W4307929897C39197057 @default.
- W4307929897 hasConceptScore W4307929897C62520636 @default.
- W4307929897 hasConceptScore W4307929897C69523127 @default.
- W4307929897 hasConceptScore W4307929897C90626534 @default.
- W4307929897 hasLocation W43079298971 @default.
- W4307929897 hasOpenAccess W4307929897 @default.
- W4307929897 hasPrimaryLocation W43079298971 @default.
- W4307929897 hasRelatedWork W1755103553 @default.
- W4307929897 hasRelatedWork W2013097733 @default.
- W4307929897 hasRelatedWork W2027450511 @default.
- W4307929897 hasRelatedWork W2067468727 @default.
- W4307929897 hasRelatedWork W2092217412 @default.
- W4307929897 hasRelatedWork W2751110119 @default.
- W4307929897 hasRelatedWork W280884978 @default.
- W4307929897 hasRelatedWork W2892006677 @default.
- W4307929897 hasRelatedWork W2911820943 @default.
- W4307929897 hasRelatedWork W3101603104 @default.
- W4307929897 isParatext "false" @default.
- W4307929897 isRetracted "false" @default.
- W4307929897 workType "article" @default.