A robust negative differential resistance (NDR) on charge density waves (CDW) exists for a 2D material after voltage pulse manipulation with low temperature scanning tunneling microscopy (LT-STM).
Significance and Impact
CDW, an ordered quantum fluid of electrons, and NDR, which has applications in electronics, are unconnected physical phenomena. This discovery opens exciting potential applications of CDW in 2D materials for electronic and nanoscale devices.
- A 1T-TaS2 (tantalum disulfide) surface was investigated.
- Atomic scale tunneling spectroscopy and atomic manipulation found an NDR appears on the CDW top sites of Ta(0) atoms forming a ‘Star of David’-type structure.
Work was performed at the Center for Nanoscale Materials.
About Argonne’s Center for Nanoscale Materials
The Center for Nanoscale Materials is one of the five DOE Nanoscale Science Research Centers, premier national user facilities for interdisciplinary research at the nanoscale supported by the DOE Office of Science. Together the NSRCs comprise a suite of complementary facilities that provide researchers with state-of-the-art capabilities to fabricate, process, characterize and model nanoscale materials, and constitute the largest infrastructure investment of the National Nanotechnology Initiative. The NSRCs are located at DOE’s Argonne, Brookhaven, Lawrence Berkeley, Oak Ridge, Sandia and Los Alamos National Laboratories. For more information about the DOE NSRCs, please visit https://science.osti.gov/User-Facilities/User-Facilities-at-a-Glance.
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