Document Type

Dataset

Dataset Type

numeric_data

Dataset Product Numbers

None

DEO Contract Number

DE-AC02- 07CH11358

Originating Research Organization

Ames Laboratory (AMES), Ames, IA (United States)

Contributor Organization(s)

Simon Fraser University

Publication/Issue Date

2016

Language

English

Country of Publication

US

Sponsoring Organization(s)

SC-22 USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Subject Categories

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Abstract

In topological quantum materials the conduction and valence bands are connected at points (Dirac/Weyl semimetals) or along lines (Line Node semimetals) in the momentum space. Numbers of studies demonstrated that several materials are indeed Dirac/Weyl semimetals. However, there is still no experimental confirmation of materials with line nodes, in which the Dirac nodes form closed loops in the momentum space. Here we report the discovery of a novel topological structure - Dirac node arcs - in the ultrahigh magnetoresistive material PtSn4 using laser-based angle-resolved photoemission spectroscopy (ARPES) data and density functional theory (DFT) calculations. Unlike the closed loops of line nodes, the Dirac node arc structure resembles the Dirac dispersion in graphene hat is extended along one dimension in momentum space and confined by band gaps on either end. We propose that this reported Dirac node arc structure is a novel topological state that provides a novel platform for studying the exotic properties of Dirac Fermions.

DOI

10.17039/ameslab.dmse.2016.DS3/1240853

Dataset File Extension

.zip, .txt

Software needed to utilize dataset

None

Dataset Size

12 Mb

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