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Related Experiment Video

Updated: Feb 19, 2026

Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems

Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems

Published on: April 28, 2016

Atomic-Resolution Spectrum Imaging of Semiconductor Nanowires.

Reza R Zamani¹, Fredrik S Hage², Sebastian Lehmann¹

¹Solid-State Physics , Lund University , Box 118, Lund 22100 , Sweden.

|November 9, 2017

Summary

This summary is machine-generated.

Atomic-resolution electron energy-loss spectroscopy (EELS) reveals distinct interface structures in GaSb-InAs nanowires. Radial interfaces are abrupt, while axial interfaces show intermixing, impacting device performance in tunneling field-effect transistors (TFETs).

Keywords:

GaSb−InAs III−V nanowire aberration-corrected STEM atomic-resolution EELS heterointerface spectrum imaging

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Analysis of Contact Interfaces for Single GaN Nanowire Devices

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Published on: November 15, 2013

Area of Science:

Materials Science
Nanotechnology
Solid-State Physics

Background:

III-V heterostructure nanowires are crucial for advanced semiconductor devices like tunneling field-effect transistors (TFETs).
Device functionality relies heavily on the atomic structure and composition of semiconductor heterointerfaces.
Existing characterization methods often lack the spatial resolution to analyze these critical interfaces at the atomic level.

Purpose of the Study:

To employ atomic-resolution electron energy-loss spectroscopy (EELS) for detailed analysis of interface atomic arrangements in semiconductor nanowire heterostructures.
To investigate the structural and compositional differences between radial and axial interfaces in GaSb-InAs heterostructure nanowires.
To correlate interface atomic configuration with the electronic properties and device performance of GaSb-InAs nanowire TFETs.

Main Methods:

Utilized atomic-resolution spectrum imaging via electron energy-loss spectroscopy (EELS) within a scanning transmission electron microscope (STEM).
Achieved sub-angstrom spatial resolution to probe local atomic structure and chemical composition.
Analyzed three-dimensional heterostructures in GaSb-InAs semiconductor nanowires.

Main Results:

Demonstrated that radial interfaces in GaSb-InAs heterostructure nanowires are atomically abrupt.
Observed an interfacial region with significant intermixing of GaSb and InAs compounds at the axial interface.
Established that local atomic configurations directly influence band alignment and charge transport properties.

Conclusions:

Atomic-resolution STEM-EELS is a powerful technique for understanding atomic-scale interface properties in nanowires.
The distinct radial (abrupt) and axial (intermixed) interfaces in GaSb-InAs nanowires lead to differing physical properties.
These findings are critical for optimizing the design and performance of GaSb-InAs nanowire TFETs and similar devices.