Kondo effect goes anisotropic in vanadate oxide superlattices.

J Phys Condens Matter

Laboratoire CRISMAT, CNRS UMR 6508, ENSICAEN et Université de Caen, 6 Bd Maréchal Juin, 14050 Caen Cedex 4, France.

Published: November 2015

We study the transport properties in SrVO3/LaVO3 (SVO/LVO) superlattices deposited on SrTiO3 (STO) substrates. We show that the electronic conduction occurs in the metallic LVO layers with a galvanomagnetism typical of a 2D Fermi surface. In addition, a Kondo-like component appears in both the thermal variation of resistivity and the magnetoresistance. Surprisingly, in this system where the STO interface does not contribute to the measured conduction, the Kondo correction is strongly anisotropic. We show that the growth temperature allows a direct control of this contribution. Finally, the key role of vanadium mixed valency stabilized by oxygen vacancies is enlightened.

Download full-text PDF

Source
http://dx.doi.org/10.1088/0953-8984/27/43/435601DOI Listing

Publication Analysis

Top Keywords

kondo anisotropic
4
anisotropic vanadate
4
vanadate oxide
4
oxide superlattices
4
superlattices study
4
study transport
4
transport properties
4
properties srvo3/lavo3
4
srvo3/lavo3 svo/lvo
4
svo/lvo superlattices
4

Similar Publications

Effects of Cation Exchange in Rhodamine B Photocatalytic Degradation Using Peroxo-Titanate Nanotubes.

Nanomaterials (Basel)

July 2024

Department of Advanced Hard Materials, SANKEN, Osaka University, 8-1 Mihogaoka, Ibaraki 567-0047, Japan.

Lepidocrocite-type layered sodium titanate (NaHTiO) is widely used in environmental remediation because of its large specific surface area, formed by anisotropic crystal growth, and its ability to store and exchange cations between layers. Additionally, peroxo-titanate nanotubes (PTNTs), which are tubular titanates with peroxy groups, exhibit visible-light absorption capabilities, rendering them suitable for photocatalytic applications under visible light irradiation. However, because of cation exchange reactions, the Na concentration and pH of the solution can fluctuate under aqueous conditions, affecting the photocatalytic performance of the PTNTs.

View Article and Find Full Text PDF

Anomalies in the Dirac bands in the proximity of correlated electrons.

Nanoscale

July 2024

Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai-400005, India.

Dirac fermions, particles with zero rest mass, are observed in topological materials and are believed to play a key role in the exotic phenomena in fundamental science and the advancement of quantum technology. Most of the topological systems studied so far are weakly correlated systems and the study of their properties in the presence of electron correlation is an interesting emerging area of research, where the electron correlation is expected to enhance the effective mass of the particles. Here, we studied the properties of Dirac bands in a non-symmorphic layered Kondo lattice system, CeAgSb, employing high-resolution angle-resolved photoemission spectroscopy and first-principles calculations.

View Article and Find Full Text PDF

Heterodimensional Kondo superlattices with strong anisotropy.

Nat Commun

June 2024

Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology, Beijing, China.

Article Synopsis
  • Localized magnetic moments in non-magnetic materials can significantly impact their metallic properties, leading to phenomena like the Kondo effect and heavy fermion behavior.
  • This study focuses on a heterodimensional superlattice structure made of one-dimensional VS chains surrounded by two-dimensional VS layers, where the Kondo effect is observed to exhibit unusual anisotropic behavior.
  • The anisotropy in the Kondo effect is linked to the unique magnetic properties of the 1D chains, as confirmed by advanced calculations, paving the way for new research in exotic correlated physics within heterodimensional materials.
View Article and Find Full Text PDF

Discovery and Characterization of Antiferromagnetic UFeAs.

Inorg Chem

March 2024

Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Straße 40, Dresden 01187, Germany.

This work presents a study on a new uranium iron arsenide UFeAs. By implementing Bi-flux synthesis, we were able to grow mm-sized single crystals of this compound, which show twinning. UFeAs is one of only two known uranium iron arsenides.

View Article and Find Full Text PDF
Article Synopsis
  • Heavy fermion physics involves complex interactions that are difficult to understand, and the one-dimensional Kondo lattice model is a key theoretical focus due to its unique properties and challenges in finding experimental materials.
  • This study introduces a quasi-1D Kondo lattice observed in a monolayer van der Waals crystal, NbSe, influenced by Se-deficient line defects that drive it into a stripe phase.
  • Through advanced imaging and calculations, the researchers discovered a charge-density wave transition and a Fano resonance at the Fermi energy, indicating strong Kondo behavior along the stripes, which allows for the study of anisotropic Kondo lattice behavior in thin materials.
View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!