Surface structure and spectroscopy of charge-density wave materials using scanning tunneling microscopy
The Scanning tunneling microscope (STM) has been used to study the effects of Fe doping on the charge-density wave (CDW) structure in NbSe{sub 3} and 1T-TaS{sub 2}. In NbSe{sub 3} small amounts of Fe reduce both CDW gaps by 25--30% and change the relative CDW amplitudes of the high and low temperature CDWs. The CDW amplitudes remain strong on all three chains of the surface unit cell with no evident disorder. In 1T-Fe{sub 0.05}Ta{sub 0.95}S{sub 2} the Fe introduces substantial disorder in the CDW pattern, but the local CDW amplitude remains strong. The CDW energy gap is reduced by approximately 50% and the resistive anomaly at the commensurate-incommensurate transition is removed. The STM in both the image and spectroscopy modes can detect subtle changes in CDW structure due to impurities.
- Research Organization:
- Virginia Univ., Charlottesville, VA (United States). Dept. of Physics
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG05-84ER45072
- OSTI ID:
- 10122090
- Report Number(s):
- DOE/ER/45072--49; ON: DE92007746
- Country of Publication:
- United States
- Language:
- English
Similar Records
Surface structure and spectroscopy of charge-density wave materials using scanning tunneling microscopy
STM studies of CDWs in pure and doped transition metal chalcogenides
Atomic force microscopy of charge density waves and atoms on 1T-TaSe sub 2 , 1T-TaS sub 2 , 1T-TiSe sub 2 , and 2H-NbSe sub 2
Technical Report
·
Mon Dec 31 23:00:00 EST 1990
·
OSTI ID:5901839
STM studies of CDWs in pure and doped transition metal chalcogenides
Journal Article
·
Mon Nov 30 23:00:00 EST 1992
· Bulletin of the American Physical Society
·
OSTI ID:131202
Atomic force microscopy of charge density waves and atoms on 1T-TaSe sub 2 , 1T-TaS sub 2 , 1T-TiSe sub 2 , and 2H-NbSe sub 2
Journal Article
·
· Journal of Vacuum Science and Technology. B, Microelectronics Processing and Phenomena; (United States)
·
OSTI ID:5227428
Related Subjects
36 MATERIALS SCIENCE
360602
665100
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHARGE DENSITY
CRYSTAL DOPING
IRON
MICROSTRUCTURE
NIOBIUM SELENIDES
NUCLEAR TECHNIQUES IN CONDENSED MATTER PHYSICS
SCANNING ELECTRON MICROSCOPY
STRUCTURE AND PHASE STUDIES
SURFACES
TANTALUM SULFIDES
WAVE PROPAGATION
360602
665100
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHARGE DENSITY
CRYSTAL DOPING
IRON
MICROSTRUCTURE
NIOBIUM SELENIDES
NUCLEAR TECHNIQUES IN CONDENSED MATTER PHYSICS
SCANNING ELECTRON MICROSCOPY
STRUCTURE AND PHASE STUDIES
SURFACES
TANTALUM SULFIDES
WAVE PROPAGATION