Multiphase superconductivity at the interface between ultrathin FeTe islands and Bi2Te3

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00598885" target="_blank" >RIV/68378271:_____/24:00598885 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/24:10483545

Výsledek na webu

<a href="https://hdl.handle.net/11104/0356461" target="_blank" >https://hdl.handle.net/11104/0356461</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41699-024-00480-x" target="_blank" >10.1038/s41699-024-00480-x</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Multiphase superconductivity at the interface between ultrathin FeTe islands and Bi2Te3

Popis výsledku v původním jazyce

FeTe monolayer islands situated on a topological insulator Bi2Te3 (0001) surface were recently reported to exhibit the opening of an energy gap below temperatures T ~ 6 K, which could be due to a superconducting phase transition. In this work, we present a magnetic field dependent transport study proving that this gap is indeed of superconducting origin. Upon cooling, several drops in resistance are observed in the temperature range between 6 K and 2 K, indicating multiple transitions. Using the Ginzburg-Landau theory, we show that the critical magnetic field of the dominant high-temperature transition at ~ 6 K is governed by orbital Cooper pair breaking in larger FeTe islands, large enough to exceed the superconductive coherence length (xi). At smaller island sizes, transitions at lower temperatures < 6 K become more prominent, showing significantly increased critical fields dominated by paramagnetic pair breaking.

Název v anglickém jazyce

Multiphase superconductivity at the interface between ultrathin FeTe islands and Bi2Te3

Popis výsledku anglicky

FeTe monolayer islands situated on a topological insulator Bi2Te3 (0001) surface were recently reported to exhibit the opening of an energy gap below temperatures T ~ 6 K, which could be due to a superconducting phase transition. In this work, we present a magnetic field dependent transport study proving that this gap is indeed of superconducting origin. Upon cooling, several drops in resistance are observed in the temperature range between 6 K and 2 K, indicating multiple transitions. Using the Ginzburg-Landau theory, we show that the critical magnetic field of the dominant high-temperature transition at ~ 6 K is governed by orbital Cooper pair breaking in larger FeTe islands, large enough to exceed the superconductive coherence length (xi). At smaller island sizes, transitions at lower temperatures < 6 K become more prominent, showing significantly increased critical fields dominated by paramagnetic pair breaking.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

npj 2D Materials and Applications

ISSN

2397-7132

e-ISSN

2397-7132

Svazek periodika

8

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

52

Kód UT WoS článku

001287497200001

EID výsledku v databázi Scopus

2-s2.0-85200878221