Surface structures and properties of Sn islands grown on superconducting substrate 2H-NbSe_2(0001)are studied using low temperature scanning tunneling microscopy or spectroscopy.The pure face-centered cubic(fee)structure of Sn surface is obtained.Superconductivity is also detected on the fcc-Sn(111)surface,and the size of superconducting gap on the Sn surface is nearly the same as that on the superconducting substrate.Furthermore,phase transition occurs from fcc-Sn(111)toβ-Sn(001)by keeping the sample at room temperature for a certain time.Due to the strain relaxation on theβ-Sn islands,both the in-plane unit cell and out-of-plane structures distort,and the height of surface atoms varies periodically to form a universal ripple structure.
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机译：Defect structure and phase transitions in epitaxial metastable cubic Ti0.5Al0.5N alloys grown on MgO(001) by ultrahyphen;highhyphen;vacuum magnetron sputter deposition
机译：High-resolution structural studies of ultra-thin magnetic, transition metal overlayers and two-dimensional transition metal oxides using synchrotron radiation
