Charge-parity symmetry observed through Friedel oscillations in chiral charge-density waves

Ishioka, J.; Fujii, T.; Katono, K.; Ichimura, K.; Kurosawa, T.; Oda, M.; Tanda, S.

Charge-parity symmetry observed through Friedel oscillations in chiral charge-density waves

Ishioka, J.; Fujii, T.; Katono, K. et al.

Physical Review B, 2011, 84(24), 245125

Permalink : https://hdl.handle.net/2115/48135

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アクセス権	open access
URI	https://hdl.handle.net/2115/48135
タイトル	Charge-parity symmetry observed through Friedel oscillations in chiral charge-density waves
著者	Ishioka, J. ; Fujii, T. ; Katono, K. ; Ichimura, K. ; Kurosawa, T. ; Oda, M. ; Tanda, S.
著者名 Ishioka, J.
著者名 Fujii, T.
著者名 Katono, K.
著者名 Ichimura, K.
著者名 Kurosawa, T.
著者名 Oda, M.
著者名 Tanda, S.
言語	英語
発行日	2011-12-15
出版者	American Physical Society
収録物名	Physical Review B
巻(号)	84(24)
ページ	245125
抄録	We discovered a chiral behavior of Friedel oscillations (FOs), which have both triangular symmetry and inverse chirality from chiral charge-density waves (CDWs) in 1T-TiSe2 by using scanning tunneling microscopy (STM). Surprisingly, the existence of FOs with the opposite chirality to the underlying CDWs suggests that the excess electron induced by impurity reduces the local helicity of CDWs without CDW breaking. This FOs can be explained with a two-branch model with different chiralities, which permits excitation from one branch to another, that is, Dirac-type dispersion. Moreover, we found two states that correspond to electron addition and electron removal. In terms of the chirality of electrons, these two states are the same. This result provides an evidence for the charge-parity (CP) symmetry conservation in CDW systems.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	©2011 American Physical Society
PISSN	1098-0121
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1103/PhysRevB.84.245125