Atomic force microscope and scanning tunneling microscope studies of superlattices and density waves in Fe doped NbSe[sub 2], TaSe[sub 2], TaS[sub 2] and in NbSe[sub 3] doped with Fe, Co, Cr, and V
Journal Article
·
· Journal of Vacuum Science and Technology. B, Microelectronics Processing and Phenomena; (United States)
- Department of Physics, University of Virginia, Charlottesville, Virginia 22901 (United States)
Results of atomic force microscope (AFM) and scanning tunneling microscope (STM) studies of superlattices and long-range modulations induced by impurities in transition metal chalcogenides are presented. Superlattices formed by Fe intercalation into the van der Waals gaps of 2H--NbSe[sub 2], 2H--TaSe[sub 2] and 2H--TaS[sub 2] show ordered occupation of the octahedral holes and STM spectroscopy shows density-wave energy gaps existing in the antiferromagnetic phases. In NbSe[sub 3], interstitial impurities such as Fe, Co, Cr, and V induce long-range modulated structures that can be detected at room temperature with AFM scans. These modulations modify the charge-density wave structure forming at low temperature and STM spectroscopy has been used to measure these changes.
- OSTI ID:
- 7236319
- Journal Information:
- Journal of Vacuum Science and Technology. B, Microelectronics Processing and Phenomena; (United States), Journal Name: Journal of Vacuum Science and Technology. B, Microelectronics Processing and Phenomena; (United States) Vol. 12:3; ISSN JVTBD9; ISSN 0734-211X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ALLOYS
AMBIENT TEMPERATURE
CHALCOGENIDES
CHROMIUM ADDITIONS
CHROMIUM ALLOYS
COBALT ADDITIONS
COBALT ALLOYS
ENERGY GAP
IRON ADDITIONS
IRON ALLOYS
NIOBIUM COMPOUNDS
NIOBIUM SELENIDES
REFRACTORY METAL COMPOUNDS
SELENIDES
SELENIUM COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
SUPERLATTICES
TANTALUM COMPOUNDS
TANTALUM SELENIDES
TANTALUM SULFIDES
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TRANSITION ELEMENT COMPOUNDS
VANADIUM ADDITIONS
VANADIUM ALLOYS
360602* -- Other Materials-- Structure & Phase Studies
ALLOYS
AMBIENT TEMPERATURE
CHALCOGENIDES
CHROMIUM ADDITIONS
CHROMIUM ALLOYS
COBALT ADDITIONS
COBALT ALLOYS
ENERGY GAP
IRON ADDITIONS
IRON ALLOYS
NIOBIUM COMPOUNDS
NIOBIUM SELENIDES
REFRACTORY METAL COMPOUNDS
SELENIDES
SELENIUM COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
SUPERLATTICES
TANTALUM COMPOUNDS
TANTALUM SELENIDES
TANTALUM SULFIDES
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TRANSITION ELEMENT COMPOUNDS
VANADIUM ADDITIONS
VANADIUM ALLOYS