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Title: A class of topological nodal rings and its realization in carbon networks

Abstract

Topological nodal rings can be classified into three types according to the slopes in their energy dispersion. Type-I nodal rings consist of type-I points, type-II rings consist of type-II points, and type-III rings consist of anisotropic points. Taking carbon networks as an example, this study shows that all three types can exist and transform from one to another under experimentally realizable strain. Within a given type, a transition between a topological metal phase and a semiconductor phase also takes place, and each type of nodal rings shrinks into the corresponding type of semi-Dirac points, including novel type-II and -III semi-Dirac points. These topological features are expected to exhibit diverse electron-hole pocket patterns and Landau levels, giving rise to unusual transport properties.

Authors:
 [1];  [1];  [1];  [2];  [3];  [4]
  1. Xiangtan Univ., Xiangtan, Hunan (China). School of Physics and Optoelectronics
  2. Rutgers Univ., Piscataway, NJ (United States). Center for Materials Theory
  3. Univ. of California, Berkeley, CA (United States). Dept. of Physics and Materials Sciences Division
  4. Rensselaer Polytechnic Inst., Troy, NY (United States). Dept. of Physics, Applied Physics, and Astronomy
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1544308
Alternate Identifier(s):
OSTI ID: 1426011
Grant/Contract Number:  
AC02-05CH11231; SC0002623; DESC0002623
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 12; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Gao, Yan, Chen, Yuanping, Xie, Yuee, Chang, Po-Yao, Cohen, Marvin L., and Zhang, Shengbai. A class of topological nodal rings and its realization in carbon networks. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.97.121108.
Gao, Yan, Chen, Yuanping, Xie, Yuee, Chang, Po-Yao, Cohen, Marvin L., & Zhang, Shengbai. A class of topological nodal rings and its realization in carbon networks. United States. doi:10.1103/PhysRevB.97.121108.
Gao, Yan, Chen, Yuanping, Xie, Yuee, Chang, Po-Yao, Cohen, Marvin L., and Zhang, Shengbai. Wed . "A class of topological nodal rings and its realization in carbon networks". United States. doi:10.1103/PhysRevB.97.121108. https://www.osti.gov/servlets/purl/1544308.
@article{osti_1544308,
title = {A class of topological nodal rings and its realization in carbon networks},
author = {Gao, Yan and Chen, Yuanping and Xie, Yuee and Chang, Po-Yao and Cohen, Marvin L. and Zhang, Shengbai},
abstractNote = {Topological nodal rings can be classified into three types according to the slopes in their energy dispersion. Type-I nodal rings consist of type-I points, type-II rings consist of type-II points, and type-III rings consist of anisotropic points. Taking carbon networks as an example, this study shows that all three types can exist and transform from one to another under experimentally realizable strain. Within a given type, a transition between a topological metal phase and a semiconductor phase also takes place, and each type of nodal rings shrinks into the corresponding type of semi-Dirac points, including novel type-II and -III semi-Dirac points. These topological features are expected to exhibit diverse electron-hole pocket patterns and Landau levels, giving rise to unusual transport properties.},
doi = {10.1103/PhysRevB.97.121108},
journal = {Physical Review B},
issn = {2469-9950},
number = 12,
volume = 97,
place = {United States},
year = {2018},
month = {3}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 8 works
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Figures / Tables:

Figure 1 Figure 1: Atomic structures of (a) AGNW-(3,2) and (b) AGNW-(1,2). The two structures belong to the series of AGNW-(m,n), formed by connecting two kinds of armchair nanoribbons in (c) with widths m and n, respectively. The blue (C1) and pink (C2) atoms are sp2 atoms while the gray atoms aremore » sp3 atoms linking the sp2 atoms. (d) Conventional (top) and primitive (bottom) cells of AGNW-(1,2). $t$1, $t$2 in (c) are hopping energies in the nanoribbons of C2 atoms, while the $t$3, $t$4 and $t$5 in (d) are hopping energies between the nanoribbons.« less

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    Works referencing / citing this record:

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      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.