Observation of three-dimensional massless Kane fermions in a zinc-blende crystal

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10277913" target="_blank" >RIV/00216208:11320/14:10277913 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1038/NPHYS2857" target="_blank" >http://dx.doi.org/10.1038/NPHYS2857</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/NPHYS2857" target="_blank" >10.1038/NPHYS2857</a>

Result language

angličtina

Original language name

Observation of three-dimensional massless Kane fermions in a zinc-blende crystal

Original language description

Solid-state physics and quantum electrodynamics, with its ultrarelativistic (massless) particles, meet in the electronic properties of one-dimensional carbon nanotubes, two-dimensional graphene or topological-insulator surfaces. However, clear experimental evidence for electronic states with a conical dispersion relation in all three dimensions, conceivable for certain bulk materials, is still missing. Here, we study a zinc-blende crystal, HgCdTe, at the point of the semiconductor-to-semimetal topological transition. For this compound, we observe three-dimensional massless electrons, as certified from the dynamical conductivity increasing linearly with the photon frequency, with a velocity of about 10(6) m s(-1). Applying a magnetic field B results ina root B-dependence of dipole-active inter-Landau-level resonances and spin splitting of Landau levels also following a root B-dependence-well-established signatures of ultrarelativistic particles but until now not observed experimentally

Czech name

—

Czech description

—

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

—

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Nature Physics

ISSN

1745-2473

e-ISSN

—

Volume of the periodical

10

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

6

Pages from-to

233-238

UT code for WoS article

000332185900021

EID of the result in the Scopus database

—