Transport properties of iron at Earth’s core conditions: The effect of spin disorder

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F17%3A00482166" target="_blank" >RIV/68378271:_____/17:00482166 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/17:10369517

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevB.96.024432" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.96.024432</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.96.024432" target="_blank" >10.1103/PhysRevB.96.024432</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Transport properties of iron at Earth’s core conditions: The effect of spin disorder

Popis výsledku v původním jazyce

We show, by considering bcc iron and an iron-rich iron-silicon alloy as a representative of the Earth’s core composition and applying first-principles modeling, that the spin disorder at the Earth’s core conditions not considered previously provides an essential contribution, of order 20 μΩ cm, to the electrical resistivity. This value is comparable in magnitude with the electron-phonon and with the recently estimated electron-electron scattering contributions. The origin of the spin-disorder resistivity (SDR) consists of the existence of fluctuating local moments that are stabilized at high temperatures by the magnetic entropy even at pressures at which the ground state of iron is nonmagnetic. We find that electron-phonon and SDR contributions are not additive at high temperatures. We thus observe a large violation of the Matthiessen rule.

Název v anglickém jazyce

Transport properties of iron at Earth’s core conditions: The effect of spin disorder

Popis výsledku anglicky

We show, by considering bcc iron and an iron-rich iron-silicon alloy as a representative of the Earth’s core composition and applying first-principles modeling, that the spin disorder at the Earth’s core conditions not considered previously provides an essential contribution, of order 20 μΩ cm, to the electrical resistivity. This value is comparable in magnitude with the electron-phonon and with the recently estimated electron-electron scattering contributions. The origin of the spin-disorder resistivity (SDR) consists of the existence of fluctuating local moments that are stabilized at high temperatures by the magnetic entropy even at pressures at which the ground state of iron is nonmagnetic. We find that electron-phonon and SDR contributions are not additive at high temperatures. We thus observe a large violation of the Matthiessen rule.

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

<a href="/cs/project/GA15-13436S" target="_blank" >GA15-13436S: Relativistické efekty v odezvě spinově polarizovaných elektronů na vnější pole</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

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

—

Svazek periodika

96

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

—

Kód UT WoS článku

000406034800006

EID výsledku v databázi Scopus

2-s2.0-85026418346