The Test of Topological Property of YbB6

TL;DR

This paper experimentally investigates the resistance properties of bulk YbB6 to assess its topological insulator characteristics, finding overall trends consistent with topological phenomena despite some deviations from theoretical expectations.

Contribution

It provides the first experimental resistance measurements of YbB6 to verify its topological insulator properties, highlighting partial agreement with theoretical predictions.

Findings

Resistance data shows trends similar to topological insulators

Deviations from theoretical models observed

Supports YbB6 as a candidate topological insulator

Abstract

Topological insulator is a recently discovered class of material with topologically protected surface state. YbB6 is predicted to be moderately correlated Z2 topological insulator similar to SmB6. Here, I experimentally test the resistance property of bulk YbB6 to verify its topological property. By changing the thickness of YbB6, I found out that although the data curves did not completely conform to the theory of topology, the experimental observation to the overall trend showed a similar topological phenomenon.