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Related Experiment Video

Updated: Jan 22, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

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Published on: January 19, 2018

Dynamical Metal to Charge-Density-Wave Junctions in an Atomic Wire Array.

Sun Kyu Song^1,2, Abdus Samad³, Stefan Wippermann³

¹Center for Artificial Low Dimensional Electronic Systems , Institute for Basic Science (IBS) , Pohang 37673 , Republic of Korea.

|July 6, 2019

Summary

This summary is machine-generated.

We explored atomic-scale electronic phase separation in In atomic wires on Si(111). Metal-insulator junctions show strong anisotropy, tunable by impurities, revealing dynamical junction formation.

Keywords:

Atomic wire charge-density-wave electronic phase separation metal−insulator junction scanning tunneling microscopy/spectroscopy

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Area of Science:

Surface science
Condensed matter physics
Materials science

Background:

Quasi-1D charge-density-wave (CDW) states exhibit complex electronic properties.
Atomic scale electronic phase separation is crucial for understanding material behavior.

Purpose of the Study:

Investigate atomic-scale electronic phase separation in In atomic wires on Si(111).
Quantify spatial variations in CDW gap and amplitude at metal-insulator interfaces.
Determine the anisotropy and tunability of these junctions.

Main Methods:

Scanning tunneling microscopy and spectroscopy (STS) to probe CDW properties.
Analysis of interfaces between metallic and insulating CDW domains.
Density functional theory (DFT) calculations for theoretical insights.

Main Results:

Quantified spatial variations of CDW gap and amplitude.
Revealed strong anisotropy in metal-insulator junctions with distinct interwire (0.4 nm) and intrawire (7 nm) lengths.
Demonstrated dramatic reduction in intrawire junction length by atomic-scale impurities.

Conclusions:

Atomic scale impurities can tune metal-insulator junctions in CDW states.
Intrawire junction formation and tunability are dynamical processes.
Findings offer insights into controlling electronic properties at the atomic scale.