6533b7d5fe1ef96bd126512b
RESEARCH PRODUCT
Probing the bond order wave phase transitions of the ionic Hubbard model by superlattice modulation spectroscopy
Roberta CitroCorinna KollathKarla LoidaJean-sébastien BernierEdmond Orignacsubject
BosonizationHubbard model[PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas]SuperlatticeGeneral Physics and AstronomyIonic bondingFOS: Physical sciences01 natural sciencesCondensed Matter - Strongly Correlated ElectronsPhysics and Astronomy (all)0103 physical sciencesBosonizationCold atoms010306 general physicsPhysicsCondensed Matter::Quantum GasesCondensed matter physicsDensity Matrix Renormalization GroupStrongly Correlated Electrons (cond-mat.str-el)010308 nuclear & particles physicsMott insulatorBerezinskii-Kosterlitz-Thouless transitionIsing transitionRenormalization groupBond orderQuantum Gases (cond-mat.quant-gas)Ising modelCondensed Matter::Strongly Correlated ElectronsCondensed Matter - Quantum Gasesdescription
An exotic phase, the bond order wave, characterized by the spontaneous dimerization of the hopping, has been predicted to exist sandwiched between the band and Mott insulators in systems described by the ionic Hubbard model. Despite growing theoretical evidences, this phase still evades experimental detection. Given the recent realization of the ionic Hubbard model in ultracold atomic gases, we propose here to detect the bond order wave using superlattice modulation spectroscopy. We demonstrate, with the help of time-dependent density-matrix renormalization group and bosonization, that this spectroscopic approach reveals characteristics of both the Ising and Kosterlitz-Thouless transitions signaling the presence of the bond order wave phase. This scheme also provides insights into the excitation spectra of both the band and Mott insulators.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-12-06 |