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DTSTAMP:20180817T225612Z
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DESCRIPTION:Honeycomb lattice has played an important role in the course of
fostering topology physics as known from the Haldane model and the Kane-Me
le model [1]. Recently\, we proposed a new way to derive nontrivial topolog
y based on honeycomb structure with time-reversal symmetry. The first examp
le is to achieve a topological photonic crystal made of dielectric material
s such as silicon [2]. We identify a pseudospin degree of freedom in electr
omagnetic (EM) modes associated with C6v crystalline symmetry\, and show th
at nontrivial topology is induced by photonic p-d band inversion. Recent mi
crowave experiments confirm our theory [3\,4]. The idea can be extended to
phononic systems\, physical waves\, and electronic systems. We investigate
graphene with detuned nearest-neighbor hopping energy or nano-hole arrays\,
and find topological edge/interface states protected by energy gap over 1e
V [5\,6\,7]. Recent progresses and perspectives of the present approach wil
l be discussed.\n\nReferences:\n[1] H.-M. Weng\, R. Yu\, X. Hu\, X. Dai and
Z. Fang\, Adv. Phys. 64\, 227 (2015).\n[2] L.-H. Wu and X. Hu\, Phys. Rev.
Lett. 114\, 223901 (2015).\n[3] Y.-T. Yang\, X. Hu and Z.-H. Hang\, Phys.
Rev. Lett. (in press) [arXiv:1610.07780].\n[4] Y. Li\, H. Chen and X. Hu\,
arXiv:1801.04395.\n[5] L.-H. Wu and X. Hu\, Sci. Rep. 6\, 24347 (2016).\n[6
] T. Kariyado and X. Hu\, Sci. Rep. 7\, 16515 (2017).\n[7] T. Kariyado\, Y.
-C. Jiang\, H.-X. Yang and X. Hu\, arXiv:1801.03115.
LOCATION:ETH Zürich\, Hönggerberg HIT J 51
ORGANIZER:
SUMMARY:Synthetic Topological State in Artificial Graphene
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