Temporary links for the 4 selected papers download :

1st paper:   Nature Nanotechnology 2016: Temporary local download link: nnano-2015-313

2nd paper: Nature Physics 2015: Temporary local download link: nphys3234

3rd paper:  Nature Communications 2015: Temporary local download link: ncomms8836

4th paper:  Nature Communications 2013: Temporary local download link: ncomms3328