Landau level spectroscopy of valence bands in HgTe quantum wells: effects of symmetry lowering

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10401054" target="_blank" >RIV/00216208:11320/19:10401054 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=pBh7DkYJOR" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=pBh7DkYJOR</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-648X/aafdf0" target="_blank" >10.1088/1361-648X/aafdf0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Landau level spectroscopy of valence bands in HgTe quantum wells: effects of symmetry lowering

Popis výsledku v původním jazyce

The Landau level spectroscopy technique has been used to explore the electronic structure of the valence band in a series of p-type HgTe/HgCdTe quantum wells with both normal and inverted ordering of bands. We find that the standard axial-symmetric 4-band Kane model, which is nowadays widely applied in physics of HgTe-based topological materials, does not fully account for the complex magneto-optical response observed in our experiments-notably, for the unexpected avoided crossings of excitations and for the appearance of transitions that are electric-dipole forbidden within this model. Nevertheless, reasonable agreement with experiments is achieved when the standard model is expanded to include effects of bulk and interface inversion asynunetries. These remove the axial synunetry, and among other, profoundly modify the shape of valence bands.

Název v anglickém jazyce

Landau level spectroscopy of valence bands in HgTe quantum wells: effects of symmetry lowering

Popis výsledku anglicky

The Landau level spectroscopy technique has been used to explore the electronic structure of the valence band in a series of p-type HgTe/HgCdTe quantum wells with both normal and inverted ordering of bands. We find that the standard axial-symmetric 4-band Kane model, which is nowadays widely applied in physics of HgTe-based topological materials, does not fully account for the complex magneto-optical response observed in our experiments-notably, for the unexpected avoided crossings of excitations and for the appearance of transitions that are electric-dipole forbidden within this model. Nevertheless, reasonable agreement with experiments is achieved when the standard model is expanded to include effects of bulk and interface inversion asynunetries. These remove the axial synunetry, and among other, profoundly modify the shape of valence bands.

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

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of Physics Condensed Matter

ISSN

0953-8984

e-ISSN

—

Svazek periodika

31

Číslo periodika v rámci svazku

14

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

145501

Kód UT WoS článku

000458634500001

EID výsledku v databázi Scopus

2-s2.0-85061868936