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Intermetallics are an important playground to stabilize a large variety of physical phenomena, arising from their complex crystal structure. The ease of their chemical tuneabilty makes them suitable platforms to realize targeted electronic…

The natural-heterostructure concept realized in delafossites highlights these layered oxides. While metallic, band- or Mott-insulating character may be associated with individual layers, inter-layer coupling still plays a decisive role. We…

Strongly Correlated Electrons · Physics 2021-07-30 Frank Lechermann

Oxide heterointerfaces constitute a rich platform for realizing novel functionalities in condensed matter. A key aspect is the strong link between structural and electronic properties, which can be modified by interfacing materials with…

Materials Science · Physics 2021-07-09 T. C. van Thiel , J. Fowlie , C. Autieri , N. Manca , M. Šiškins , D. Afanasiev , S. Gariglio , A. D. Caviglia

Copper oxide high temperature superconductors universally exhibit multiple forms of electronically ordered phases that break the native translational symmetry of the CuO2 planes. The interplay between these orders and the superconducting…

Material surfaces encompass structural and chemical discontinuities that often lead to the loss of the property of interest in the so-called dead layers. It is notably problematic in nanoscale oxide electronics, where the integration of…

The two-dimensional superconductor formed at the interface between the complex oxides, lanthanum aluminate (LAO) and strontium titanate (STO) has several intriguing properties that set it apart from conventional superconductors. Most…

The electronic structure of BaTi2As2O, a parent compound of the newly discovered titanium-based oxypnictide superconductors, is studied by angle-resolved photoemission spectroscopy. The electronic structure shows multi-orbital nature and…

Superconductivity · Physics 2015-06-18 H. C. Xu , M. Xu , R. Peng , Y. Zhang , Q. Q. Ge , F. Qin , M. Xia , J. J. Ying , X. H. Chen , M. Arita , K. Shimada , M. Taniguchi , D. H. Lu , B. P. Xie , D. L. Feng

Analysis of hyperfine structure constants of singly ionised cobalt (Co II) were performed on cobalt spectra measured by Fourier transform spectrometers in the region $3000-63000$ cm$^{-1}$ ($3333-159$ nm). Fits to over $700$ spectral lines…

Atomic Physics · Physics 2020-12-09 Milan Ding , Juliet C. Pickering

The electronic state in layered cobalt oxides with hexagonal structure is examined. We find that the electronic structure reflects the nature of the Kagom\'e lattice hidden in the CoO_2 layer which consists of stacked triangular lattices of…

Strongly Correlated Electrons · Physics 2007-05-23 W. Koshibae , S. Maekawa

Hexagonal Boron Nitride substrates have been shown to dramatically improve the electric properties of graphene. Recently, it has been observed that when the two honeycomb crystals are close to perfect alignment, strong lattice distortions…

Mesoscale and Nanoscale Physics · Physics 2014-10-08 Pablo San-Jose , Ángel Gutiérrez , Mauricio Sturla , Francisco Guinea

Structural, magnetic and electrical-transport properties of {\alpha}-LiFeO2, crystallizing in the rock salt structure with random distribution of Li and Fe ions, have been studied by synchrotron X-ray diffraction, 57Fe M\"ossbauer…

Strongly Correlated Electrons · Physics 2017-09-29 Samar Layek , Eran Greenberg , Weiming Xu , Gregory Kh. Rozenberg , Moshe P. Pasternak , Jean-Paul Itié , Dániel G. Merkel

Two-dimensional electron gas (2DEG) formed at the interface between two insulating oxides offers an opportunity for fundamental research and device applications. Binary alkaline earth metal oxides possess compatible lattice constants with…

The control of charges in a circuit due to an external electric field is ubiquitous to the exchange, storage and manipulation of information in a wide range of applications, from electronic circuits to synapses in neural cells. Conversely,…

Applied Physics · Physics 2018-04-26 Adolfo De Sanctis , Iddo Amit , Steven P. Hepplestone , Monica F. Craciun , Saverio Russo

Contact interface properties are important in determining the performances of devices based on atomically thin two-dimensional (2D) materials, especially those with short channels. Understanding the contact interface is therefore quite…

Materials Science · Physics 2020-05-01 Bo Han , Chen Yang , Xiaolong Xu , Yuehui Li , Ruochen Shi , Kaihui Liu , Haicheng Wang , Yu Ye , Jing Lu , Dapeng Yu , Peng Gao

Recently, a new organic superconductor, K-intercalated Picene with high transition temperatures $T_c$ (up to 18\,K) has been discovered. We have investigated the electronic properties of the undoped relative, solid picene, using a…

X-ray diffraction multipole refinements of single-crystalline Mg$_x$Al$_{1-x}$B$_2$ and polarization-dependent near-edge x-ray absorption fine structure at the B 1$s$ edge reveal a strongly anisotropic electronic structure. Comparing the…

Superconductivity · Physics 2016-04-01 M. Merz , P. Schweiss , Th. Wolf , H. v. Löhneysen , S. Schuppler

Disorder-induced ordering and unprecedentedly high radiation tolerance in $\gamma$-phase of gallium oxide is a recent spectacular discovery at the intersection of the fundamental physics and electronic applications. Importantly, by far,…

In order to determine the key parameters that control the resistive switching mechanism in metal-complex oxides interfaces, we have studied the electrical properties of metal / YBa2Cu3O7-d (YBCO) interfaces using metals with different…

Materials Science · Physics 2015-06-03 A. Schulman , C. Acha

We claim that for calculations of the electronic structure of 3d oxides very strong electron correlations have to be taken into account similarly to those assumed in many-electron crystal field approach. For Co3+ ions in NaxCoO2.yH2O there…

Strongly Correlated Electrons · Physics 2008-10-08 R. J. Radwanski Z. Ropka

Battery interfaces critically influence lithium-metal battery performance through their role in ion diffusion and dendrite formation. However, structural characterization of these interfaces has remained challenging due to limitations in…

Materials Science · Physics 2025-05-08 Hyeongjun Koh , Eric Detsi , Eric A. Stach