物理学报Issue(8)：1-9,9.DOI:10.7498/aps.64.087302
硅烯中受电场调控的体能隙和朗道能级∗
Electric field controlled energy gap and Landau levels in silicene
摘要
Abstract
We investigate the electric field controlled energy gap and the Landau levels in silicene in detail. The energy gap at different Dirac points has different closing and reopening conditions and the 2-fold degeneracy induced by the K-K′symmetry is resolved. An externally applied electric field gives rise to two Rashba spin-orbit-couplings between the nearest neighbour and the next nearest neighbour in silicene. Both these couplings can resolve the spin degeneracy at some isolated values of the electric field, where the crossover of the successive Landau levels become anti-crossover. Except some special values of the electric field, the 4-fold degeneracy of energy levels associated with the K-K′symmetry and spin symmetry is completely resolved in silicene, each level has a definite spin polarization, which correspond to the quantum Hall plateaux with filling factorν=0, ±1, ±2, · · · .关键词
硅烯/朗道能级/简并/自旋轨道耦合Key words
silicene/Landau levels/degeneracy/spin-orbit-couplings引用本文复制引用
计青山,郝鸿雁,张存喜,王瑞..硅烯中受电场调控的体能隙和朗道能级∗[J].物理学报,2015,(8):1-9,9.基金项目
国家自然科学基金(批准号:11304281)和浙江省自然科学基金(批准号：LY13D060002)资助的课题.* Project supported by National Natural Science Foundation of China (Grant No.11304281) and the Natural Science Foundation of Zhejiang Province, China (Grant No. LY13D060002) （批准号:11304281）
