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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Nature Physics

ISSN

1745-2473

e-ISSN

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Svazek periodika

10

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

6

Strana od-do

233-238

Kód UT WoS článku

000332185900021

EID výsledku v databázi Scopus

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