Transition from nodal loop to nodal chain phase in a periodically modulated optical lattice
| Autor: | Chuanhao Yin, Linhu Li, Shu Chen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Optical lattice Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Crystal system FOS: Physical sciences Fermi surface Mathematics::Spectral Theory 01 natural sciences Semimetal 010305 fluids & plasmas Brillouin zone Condensed Matter - Other Condensed Matter Phase factor symbols.namesake Mathematics::Algebraic Geometry Lattice (order) Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences symbols 010306 general physics Hamiltonian (quantum mechanics) Other Condensed Matter (cond-mat.other) |
| Popis: | We propose to study the transition from a nodal loop to nodal chain phase in a tunable two-dimensional $\pi$-flux lattice with periodical modulation potential. The Hamiltonian describes a periodically modulated optical lattice system under artificial magnetic fluxes and the tunable modulation phase factor provides additionally an artificial dimension of external parameter space. We demonstrate that this lattice system is able to describe a semimetal with either nodal loop or nodal chain Fermi surface in the extended three-dimensional Brillouin zone. By changing the strength of modulation potential $V$, we realize the transformation between the nodal-loop and nodal-chain semimetal. Comment: 6 pages, 4 figures |
| Databáze: | OpenAIRE |
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