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Topological Insulators: Materials – Fundamental Properties – Devices
Author(s) -
Rader Oliver,
Bihlmayer Gustav,
Fischer Saskia F.
Publication year - 2021
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.202170010
Subject(s) - topological insulator , topology (electrical circuits) , insulator (electricity) , band gap , engineering physics , materials science , physics , nanotechnology , condensed matter physics , electrical engineering , optoelectronics , engineering
Topological insulators are materials that are electrically insulating in the bulk but can conduct electricity due to topologically protected electronic edge or surface states. Since 2013, the German Research Foundation (DFG) has been supporting the Priority Program “Topological Insulators: Materials – Fundamental Properties – Devices” (SPP 1666) and in the time since, topological insulators developed from a mere curiosity to a material class that entered many fields of applied research. This Special Issue presents in 20 articles reports of the Priority Program reflecting its three areas of activity: (i) Understanding and improvement of existing topological insulator materials, regarding the size of the band gap and intrinsic doping levels, to enable room temperature applications, (ii) exploration of fundamental properties necessary for the development of device structures, and (iii) discovery of new materials to overcome deficits of current materials and explore new properties. See also the Guest Editorial (article number 2000594 ). The cover shows a Bi 2 Te 3 /MnBi 2 Te 4 heterostructure, a ferromagnetic topological insulator (data by M. Albu, H. Groiss, S. Wimmer, G. Kothleitner, O. Caha, and J. Michalička; artwork by E. D. L. Rienks and O. Rader).