Edge states of mechanical diamond and its topological origin

被引：17

作者：

Takahashi, Yuta ^{[1
]}

Kariyado, Toshikaze ^{[2
]}

Hatsugai, Yasuhiro ^{[1
]}

机构：

[1] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan

[2] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton WPI MANA, Tsukuba, Ibaraki 3050044, Japan

来源：

NEW JOURNAL OF PHYSICS | 2017年 / 19卷

关键词：

INSULATOR; LATTICES; MODES;

D O I：

10.1088/1367-2630/aa5edb

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Amechanical diamond, with the classical mechanics of a spring-mass model arrayed on a diamond lattice, is discussed topologically. Its frequency dispersion possesses an intrinsic nodal structure in the three-dimensional Brillouin zone (BZ) protected by the chiral symmetry. Topological changes of the line nodes are demonstrated, associated with the modification of the tension. The line nodes projected into two-dimensional BZ, form loops, which are characterized by the quantized Berry phases with 0 or p. With boundaries, the edge states are discussed in relation to the Berry phases and winding numbers, and the bulk-edge correspondence of the mechanical diamond is established.

引用

页数：9

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