Probing the phase transition to a coherent 2D Kondo Lattice
Entity
UAM. Departamento de Física de la Materia Condensada; UAM. Departamento de QuímicaPublisher
WileyDate
2023-10-24Citation
10.1002/smll.202303275
Small (2023): 2303275
ISSN
1613-6810 (print); 1613-6829 (online)DOI
10.1002/smll.202303275Funded by
This work was supported by Ministerio de Ciencia, Innovación y Universidades through grants, PID2021-128011NB-I00 and PID2019-105458RBI00. Ministerio de Ciencia e Innovación and Comunidad de Madrid through grants “Materiales Disruptivos Bidimensionales (2D)” (MAD2DCM)-UAM and “Materiales Disruptivos Bidimensionales (2D)” (MAD2DCM)-IMDEA-NC funded by the Recovery, Transformation and Resilience Plan, and by NextGenerationEU from the European Union. Comunidad de Madrid through grants NMAT2D-CM P20128/NMT-4511 and NanoMagCost. IMDEA Nanoscience acknowledges support from the “‘Severo Ochoa”’ Programme for Centres of Excellence in R&D CEX2020-001039-S. IFIMAC acknowledges support from the “‘María de Maeztu”’ Programme for Units of Excellence in R&D CEX2018-000805-M. M.G. thanks Ministerio de Ciencia, Innovación y Universidades “Ramón y Cajal” Fellowship RYC2020-029317-I. Allocation of computing time at the Centro de Computación Científica at the Universidad Autónoma de Madrid, the CINECA Consortium INF16_npqcd Project, and Newton HPCC Computing Facility at the University of Calabria (MP)Project
Gobierno de España. PID2021-128011NB-I00; Gobierno de España. PID2019-105458RB-100; Comunidad de Madrid. MAD2D-CM; Comunidad de Madrid. NMAT2D-CM P20128/NMT-4511; Gobierno de España. CEX2020-001039-SEditor's Version
https://doi.org/10.1002/smll.202303275Subjects
2D materials; Density functional theory; Highly correlated materials; Kondo lattice; LT-STM/STS; TaS2; Van der Waals heterostructures; FísicaRights
© 2023 The AuthorsEsta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional.
Abstract
Kondo lattices are systems with unusual electronic properties that stem from
strong electron correlation, typically studied in intermetallic 3D compounds
containing lanthanides or actinides. Lowering the dimensionality of the
system enhances the role of electron correlations providing a new tuning
knob for the search of novel properties in strongly correlated quantum matter.
The realization of a 2D Kondo lattice by stacking a single-layer Mott insulator
on a metallic surface is reported. The temperature of the system is steadily
lowered and by using high-resolution scanning tunneling spectroscopy, the
phase transition leading to the Kondo lattice is followed. Above 27 K the
interaction between the Mott insulator and the metal is negligible and both
keep their original electronic properties intact. Below 27 K the Kondo
screening of the localized electrons in the Mott insulator begins and below
11 K the formation of a coherent quantum electronic state extended to the
entire sample, i.e., the Kondo lattice, takes place. By means of density
functional theory, the electronic properties of the system and its evolution
with temperature are explained. The findings contribute to the exploration of
unconventional states in 2D correlated materials
Files in this item
Google Scholar:Ayani, Cosme G.
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Pisarra, Michele
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Ibarburu, Iván M.
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Garnica, Manuela
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Miranda Soriano, Rodolfo
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Calleja, Fabián
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Martín, Fernando
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López Vázquez de Parga, Amadeo
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