Surface band characters of Weyl semimetal candidate material MoTe2 revealed by one-step angle-resolved photoemission theory

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00541766" target="_blank" >RIV/68378271:_____/21:00541766 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevB.103.125139" target="_blank" >https://doi.org/10.1103/PhysRevB.103.125139</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.103.125139" target="_blank" >10.1103/PhysRevB.103.125139</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Surface band characters of Weyl semimetal candidate material MoTe2 revealed by one-step angle-resolved photoemission theory

Popis výsledku v původním jazyce

The layered MoTe2 in the Td phase is a semimetal, predicted to possess topologically non-trivial bands corresponding to Weyl fermions. Clear ARPES evidence is still lacking, which calls for a careful examination of the relation between ground state band structure calculations and ARPES intensity plots. We study the near Fermi-energy band structure of MoTe2(Td) by means of ARPES measurements, DFT, and one-step-model ARPES calculations. Agreement between theory and experiment is obtained. We analyse the orbital character of the surface bands and its relation to the ARPES polarization dependence. We find that light polarization has a major effect on which bands can be observed by ARPES. For s-polarized light, the ARPES intensity is dominated by subsurface Mo d orbitals, while p-polarized light reveals the bands composed mainly from Te p orbitals. Suitable light polarization for observing either electron or hole pocket are determined.

Název v anglickém jazyce

Surface band characters of Weyl semimetal candidate material MoTe2 revealed by one-step angle-resolved photoemission theory

Popis výsledku anglicky

The layered MoTe2 in the Td phase is a semimetal, predicted to possess topologically non-trivial bands corresponding to Weyl fermions. Clear ARPES evidence is still lacking, which calls for a careful examination of the relation between ground state band structure calculations and ARPES intensity plots. We study the near Fermi-energy band structure of MoTe2(Td) by means of ARPES measurements, DFT, and one-step-model ARPES calculations. Agreement between theory and experiment is obtained. We analyse the orbital character of the surface bands and its relation to the ARPES polarization dependence. We find that light polarization has a major effect on which bands can be observed by ARPES. For s-polarized light, the ARPES intensity is dominated by subsurface Mo d orbitals, while p-polarized light reveals the bands composed mainly from Te p orbitals. Suitable light polarization for observing either electron or hole pocket are determined.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Physical Review B

ISSN

2469-9950

e-ISSN

2469-9969

Svazek periodika

103

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

125139

Kód UT WoS článku

000646179600001

EID výsledku v databázi Scopus

2-s2.0-85104228208