Lifting spin degeneracy in rhombohedral trilayer graphene for high magnetoresistance applications

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00642491" target="_blank" >RIV/68378271:_____/25:00642491 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1021/acs.jpclett.5c02712" target="_blank" >https://doi.org/10.1021/acs.jpclett.5c02712</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpclett.5c02712" target="_blank" >10.1021/acs.jpclett.5c02712</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Lifting spin degeneracy in rhombohedral trilayer graphene for high magnetoresistance applications

Popis výsledku v původním jazyce

Many exotic properties in rhombohedral (or ABCstacked) multilayer graphene have recently been reported experimentally. In this Letter, we first reveal the underlying mechanism of spin degeneracy lifting in rhombohedral trilayer graphene. Then, we propose a design concept for all-rhombohedral graphene-based magnetic tunnel junctions (MTJs) by utilizing pristine, back-gated, and top-gated ABCstacked trilayer graphene, which exhibit semimetallic (conducting), semiconducting (insulating), and half-metallic (ferromagnetic) behavior, respectively. This enables the realization of an “all-in-one” magnetic tunnel junction based entirely on trilayer graphene. This design enables voltage-controlled spintronics (lower power than conventional MTJs) with perfect interfacial matching and subnanometer thickness uniformity across 4-in. wafers. Using first-principles calculations and the nonequilibrium Green’s function, we comprehensively study electronic structures and transport properties of these all-graphene MTJs. Furthermore, we demonstrate that their characteristics can be tuned via a perpendicular electric field and electron doping. Our findings offer a new concept for the development of fully graphene-based spintronic devices utilizing the three distinct electronic phases of rhombohedral trilayer graphene.

Název v anglickém jazyce

Lifting spin degeneracy in rhombohedral trilayer graphene for high magnetoresistance applications

Popis výsledku anglicky

Many exotic properties in rhombohedral (or ABCstacked) multilayer graphene have recently been reported experimentally. In this Letter, we first reveal the underlying mechanism of spin degeneracy lifting in rhombohedral trilayer graphene. Then, we propose a design concept for all-rhombohedral graphene-based magnetic tunnel junctions (MTJs) by utilizing pristine, back-gated, and top-gated ABCstacked trilayer graphene, which exhibit semimetallic (conducting), semiconducting (insulating), and half-metallic (ferromagnetic) behavior, respectively. This enables the realization of an “all-in-one” magnetic tunnel junction based entirely on trilayer graphene. This design enables voltage-controlled spintronics (lower power than conventional MTJs) with perfect interfacial matching and subnanometer thickness uniformity across 4-in. wafers. Using first-principles calculations and the nonequilibrium Green’s function, we comprehensively study electronic structures and transport properties of these all-graphene MTJs. Furthermore, we demonstrate that their characteristics can be tuned via a perpendicular electric field and electron doping. Our findings offer a new concept for the development of fully graphene-based spintronic devices utilizing the three distinct electronic phases of rhombohedral trilayer graphene.

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

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Physical Chemistry Letters

ISSN

1948-7185

e-ISSN

—

Svazek periodika

16

Číslo periodika v rámci svazku

46

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

11933-11938

Kód UT WoS článku

001610026900001

EID výsledku v databázi Scopus

2-s2.0-105022408864