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Topological States in Multi-Orbital Honeycomb Lattices of HgTe (CdTe) Quantum Dots
Beugeling, Wouter; Kalesaki, Efterpi; Delerue, Christophe et al.
2015In ECS Transactions, 69 (5), p. 81-88
 

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Abstract :
[en] We summarize recent theoretical works on artificial graphene realized by honeycomb lattices of semiconductor (CdSe, HgTe, CdTe) quantum dots forming a two-dimensional single-crystalline sheet. In the case of CdSe, we predict conduction bands with Dirac cones at two distinct energies and nontrivial flat bands. An analogous behavior is found in HgTe but, in addition, the strong spin-orbit coupling opens large topologically nontrivial gaps, leaving a flattened band detached from the others. We deduce that honeycomb lattices of HgTe quantum dots may constitute promising platforms for the observation of a fractional Chern insulator or a fractional quantum spin Hall phase. Similar predictions are made for CdTe but with smaller nontrivial gaps.
Disciplines :
Physics
Author, co-author :
Beugeling, Wouter;  Max-Planck-Institut für Physik komplexer Systeme
Kalesaki, Efterpi ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Delerue, Christophe;  UMR CNRS 8520 > IEMN – Département ISEN
Niquet, Yann-Michel;  Université Grenoble Alpes & CEA, INAC-SP2M, L_Sim
Vanmaekelbergh, Daniel;  University of Utrecht > Debye Institute for Nanomaterials Science
Morais Smith, Cristiane;  Utrecht University > Institute for Theoretical Physics, Center for Extreme Matter and Emergent Phenomena
External co-authors :
yes
Language :
English
Title :
Topological States in Multi-Orbital Honeycomb Lattices of HgTe (CdTe) Quantum Dots
Publication date :
2015
Event name :
228th ECS Meeting
Event place :
Phoenix, Arizona, United States
Event date :
from 11-10-2015 to 15-10-2015
By request :
Yes
Audience :
International
Journal title :
ECS Transactions
ISSN :
1938-6737
Publisher :
The Electrochemical Society, Pennington, United States - New Jersey
Special issue title :
ECS Transactions
Volume :
69
Issue :
5
Pages :
81-88
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since 01 December 2015

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