scholarly journals Homotopy invariant in time-reversal and twofold rotation symmetric systems

2021 ◽  
Vol 104 (4) ◽  
Author(s):  
Haoshu Li ◽  
Shaolong Wan
PIERS Online ◽  
2006 ◽  
Vol 3 (8) ◽  
pp. 1259-1263
Author(s):  
Ian Scott ◽  
Ana Vukovic ◽  
Phillip Sewell
Keyword(s):  

Author(s):  
Hubert Grün ◽  
Christian Hofer ◽  
Markus Haltmeier ◽  
Günther Paltauf ◽  
Peter Burgholzer

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