Scanning tunneling microscopy of defect states in the semiconductorBi2Se3

Scanning tunneling microscopy of defect states in the semiconductor Bi2Se3

Scanning tunneling spectroscopy images of Bi2Se3 doped with excess Bi reveal electronic defect states with a striking shape resembling clover leaves. With a simple tight-binding model, we show that the geometry of the defect states in Bi2Se3 can be directly related to the position of the originating impurities. Only the Bi defects at the Se sites five atomic layers below the surface are experim...

Adsorbed states and scanning tunneling microscopy

The authors have studied adsorption of acetylene on Cu͑110͒ by means of low-temperature scanning tunneling microscopy. Adsorbed molecules preferentially aggregate at 40 K to yield dimer, trimer, and larger islands on the surface. Isolated species ͑monomer͒ adsorbs on the fourfold hollow site with ϳsp 3 rehybridization as characterized by inelastic electron tunneling spectroscopy. Tunneling electron...

Investigation of non-collinear spin states with scanning tunneling microscopy.

Most ferromagnetic and antiferromagnetic substances show a simple collinear arrangement of the local spins. Under certain circumstances, however, the spin configuration is non-collinear. Scanning tunneling microscopy with its potential atomic resolution is an ideal tool for investigating these complex spin structures. Non-collinearity can be due to topological frustration of the exchange intera...

Microscopy, Scanning Tunneling

Ultrafast Scanning Tunneling Microscopy