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Chiral Charge-Density Waves
| Title: | Chiral Charge-Density Waves |
| Authors: | Ishioka, J. Browse this author | | Liu, Y. H. Browse this author | | Shimatake, K. Browse this author | | Kurosawa, T. Browse this author | | Ichimura, K. Browse this author | | Toda, Y. Browse this author | | Oda, M. Browse this author | | Tanda, S. Browse this author |
| Issue Date: | 22-Oct-2010 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review Letters |
| Volume: | 105 |
| Issue: | 17 |
| Start Page: | 176401 |
| Publisher DOI: | 10.1103/PhysRevLett.105.176401 |
| PMID: | 21231061 |
| Abstract: | We discovered the chirality of charge-density waves (CDW) in 1T-TiSe2 by using STM and time-domain optical polarimetry. We found that the CDW intensity becomes Ia1:Ia2:Ia3 = 1:0.7 ± 0.1:0.5 ± 0.1, where Iai (i = 1, 2, 3) is the amplitude of the tunneling current contributed by the CDWs. There were two states, in which the three intensity peaks of the CDW decrease clockwise and anticlockwise. The chirality in CDW results in the threefold symmetry breaking. Macroscopically, twofold symmetry was indeed observed in optical measurement. We propose the new generalized CDW chirality H_[CDW] = q1・(q2 x q3), where qi are the CDW q vectors, which is independent of the symmetry of components. The nonzero H_[CDW] - the triple-q vectors do not exist in an identical plane in the reciprocal space - should induce a real-space chirality in CDW system. |
| Rights: | © 2010 The American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/44289 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 丹田 聡
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