We investigate ultracold fermionic atoms in the trilayer honeycomb lattice.In the low energy approximation,we derive an effective Hamiltonian for pseudospins.The energy spectrum shows a cubic form of the wavevector an...We investigate ultracold fermionic atoms in the trilayer honeycomb lattice.In the low energy approximation,we derive an effective Hamiltonian for pseudospins.The energy spectrum shows a cubic form of the wavevector andis gapless.The quasiparticles and quasiholes are chiral and show Berry's phase π when the wavevector adiabaticallyevolves along a closed circle.Furthermore,the experimental detection of the energy spectrum is proposed with Braggscattering techniques.展开更多
基金Supported by the Teaching and Research Foundation for the Outstanding Young Faculty of Southeast University
文摘We investigate ultracold fermionic atoms in the trilayer honeycomb lattice.In the low energy approximation,we derive an effective Hamiltonian for pseudospins.The energy spectrum shows a cubic form of the wavevector andis gapless.The quasiparticles and quasiholes are chiral and show Berry's phase π when the wavevector adiabaticallyevolves along a closed circle.Furthermore,the experimental detection of the energy spectrum is proposed with Braggscattering techniques.
