Kibayashi, S.
Takahashi, Y.
Seki, S.
Tokura, Y.
Article History
Received: 25 March 2014
Accepted: 2 July 2014
First Online: 1 August 2014
Change Date: 4 August 2014
Change Type: Update
Change Details: The HTML version of this Article previously published incorrectly listed Y. Tokura, and not Y. Takahashi, as a corresponding author. This has now been corrected in the HTML; the PDF version of the paper was correct from the time of publication.
Competing interests
: The authors declare no competing financial interests.