Scanning Tunneling Microscopy of the Organic Semiconductor ((Eta-C5Me5) 2Ru(1,4-(2(2))-cyclophane)) (TCNQ)4
Abstract
Scanning tunneling microscopy studies of the (001) and (010) faces of the molecular semiconductor are reported. STM images of both faces reveal local density of states (LDOS associated with stacking of TCNQ molecules along the (100) direction in two crystallographically unique stacks. The tunneling current contrast conforms to the tetrameric periodicity of the TCNQ stacks observed in the crystal structure. Each TCNQ column exhibits a tunneling current corrugation repeating at intervals of a that is attributed to tunneling into the conduction band of a antiferromagnetic 2kF charge density wave (CDW) structure. The CDWs also exhibit corrugation, and antiphase modulation, at a/2 with respect to adjacent attacks, consistent with appreciable interstack coulomb interactions and contributions from the magnetic 4kF structure, which based on the tight binding approximation is equivalent to the canonical description.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 26, 1992
- Accession Number
- ADA246848
Entities
People
- Henry S. White
- Michael D. Ward
- Shulong Li
Organizations
- University of Minnesota