Towards large-Chern-number topological phases by periodic quenching

Towards large-Chern-number topological phases by periodic quenching
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通过周期性猝灭实现大陈数拓扑相

DOI:
10.1103/physrevb.93.184306
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发表时间:
2016-01
期刊:
影响因子:
3.7
通讯作者:
An Jun-Hong
An Jun-Hong
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Xiong Tian-Shi;Gong Jiangbin;An Jun-Hong

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具有大陈数的拓扑相位具有重要的意义。他们以前预测存在考虑制造的长程相互作用或多层材料。最近在Floquet拓扑相位的广泛兴趣的刺激下,在这里,我们提出了一个计划,工程师大陈数相位容易定期淬火。使用一个两带系统作为一个例子,我们从理论上展示了如何广泛可调的陈数的各种拓扑相位可以产生两个简单的哈密顿量,否则给低陈数之间的周期性淬火。通过Floquet谱中多个Dirac锥的出现解释了所获得的大的陈氏数。在两带模型中不同拓扑相之间的过渡线也被明确地找到,从而建立了一类易于求解但非常丰富的系统,有助于进一步理解和应用拓扑相在周期驱动系统。
Topological phases with large Chern numbers have important implications. They were previously predicted to exist by considering fabricated long-range interactions or multilayered materials. Stimulated by recent wide interests in Floquet topological phases, here we propose a scheme to engineer large-Chern-number phases with ease by periodic quenching. Using a two-band system as an example, we theoretically show how a variety of topological phases with widely tunable Chern numbers can be generated by periodic quenching between two simple Hamiltonians that otherwise give low Chern numbers. The obtained large Chern numbers are explained through the emergence of multiple Dirac cones in the Floquet spectra. The transition lines between different topological phases in the two-band model are also explicitly found, thus establishing a class of easily solvable but very rich systems useful for further understandings and applications of topological phases in periodically driven systems.
DOI: --
发表时间: --
期刊: --
影响因子: --
作者:
J. S. Milne
通讯作者: J. S. Milne
DOI: 10.1515/9781400846733
发表时间: 2013-04
期刊: --
影响因子: --
作者:
B. Bernevig
通讯作者: B. Bernevig
DOI: 10.1016/0030-3992(80)90094-8
发表时间: 1997
期刊: --
影响因子: --
作者:
G. Cuniberti;G. Fagas;K. Richter;Cuniberti Fagas;Richter;K. von Klitzing;P. Hänggi;S. Kohler-S.-K
通讯作者: G. Cuniberti;G. Fagas;K. Richter;Cuniberti Fagas;Richter;K. von Klitzing;P. Hänggi;S. Kohler-S.-K