An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Liu B, Li JL, Li X, Qiao CF.Liu B, et al. Among authors: qiao cf.Phys Rev Lett. 2012 Feb 3;108(5):050501. doi: 10.1103/PhysRevLett.108.050501. Epub 2012 Jan 31.Phys Rev Lett. 2012.PMID: 22400918
Qiao CF, Tang L.Qiao CF, et al.Phys Rev Lett. 2014 Nov 28;113(22):221601. doi: 10.1103/PhysRevLett.113.221601. Epub 2014 Nov 26.Phys Rev Lett. 2014.PMID: 25494067