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Updated: Jun 19, 2026

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

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Published on: December 5, 2015

Monoclinic LaSb₂ Superconducting Thin Films.

Adrian Llanos^1,2, Giovanna Campisi³, Veronica Show^1,2

¹Department of Applied Physics and Materials Science, California Institute of Technology, Pasadena, California 91125, United States.

|July 1, 2024

Summary

This summary is machine-generated.

Researchers discovered a new form of lanthanum diantimonide (LaSb2) in thin films. This novel structure exhibits enhanced superconductivity at 2 K, opening new avenues for materials science.

Keywords:

rare-earth antimonide superconductivity thin-film growth two-dimensional materials

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Published on: April 12, 2019

Area of Science:

Condensed Matter Physics
Materials Science
Solid-State Chemistry

Background:

Rare-earth diantimondes display coupled structural and electronic orders.
These properties are tunable via external stimuli like pressure and temperature.

Purpose of the Study:

To report the discovery and characterization of a new polymorph of LaSb2.
To investigate the electronic properties, specifically superconductivity, of this novel material.

Main Methods:

Thin film synthesis using molecular beam epitaxy.
Structural characterization via diffraction and electron microscopy.
First-principles calculations for theoretical analysis.

Main Results:

Identification of a YbSb2-type monoclinic lattice structure for LaSb2, a previously uncharacterized stacking configuration.
Observation of superconductivity with a critical temperature (Tc) of 2 K.
Enhanced superconducting properties, including a long coherence length of 1730 Å, compared to bulk LaSb2.

Conclusions:

Thin film epitaxy can stabilize novel stacking configurations in quasi-two-dimensional compounds.
The discovered LaSb2 polymorph presents a new platform for studying structure-property relationships in layered materials.
This work expands the understanding of rare-earth diantimonides and their superconducting behavior.