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Geometrical moir\'e patterns, generic for almost aligned bilayers of two-dimensional (2D) crystals with similar lattice structure but slightly different lattice constants, lead to zone folding and miniband formation for electronic states.…

Mesoscale and Nanoscale Physics · Physics 2019-04-01 David A. Ruiz-Tijerina , Vladimir I. Fal'ko

Superlattices of correlated oxides have been used to explore interfacial effects and to achieve additional control over the physical properties of individual constituents. In this work, we present a first-principles perspective of the…

Strongly Correlated Electrons · Physics 2024-02-02 V. A. M. Lima , M. C. O. Aguiar , N. C. Plumb , M. Radovic , W. H. Brito

Halide perovskites belong to an important family of semiconducting materials with unique electronic properties that enable a myriad of applications, especially in photovoltaics and optoelectronics. Their optical properties, including…

Hybridization effects play a crucial role in determining the electronic properties of hybrid inorganic/organic interfaces. To gain insight into these important interactions, we perform a first-principles study based on hybrid…

Materials Science · Physics 2022-04-06 Jannis Krumland , Caterina Cocchi

Lattice-matched heterovalent alloys and superlattices have some unique physical properties. For example, their band gap can change by a large amount without significant change in their lattice constants, thus they have great potential for…

Materials Science · Physics 2013-09-30 Hui-Xiong Deng , Bing Huang , Jingbo Li , Shu-Shen Li , Su-Huai Wei

Motivated by experiments on atomically smooth layers of LaTiO$_3$, a Mott insulator, sandwiched between layers of SrTiO$_3$, a band insulator, a simple model for such heterostructures is studied using quasi one-dimensional lattices and the…

Strongly Correlated Electrons · Physics 2009-11-11 S. S. Kancharla , E. Dagotto

Polarized Neutron Reflectometry and magnetometry measurements have been used to obtain a comprehensive picture of the magnetic structure of a series of La{2/3}Sr{1/3}MnO{3}/Pr{2/3}Ca{1/3}MnO{3} (LSMO/PCMO) superlattices, with varying…

Strongly Correlated Electrons · Physics 2009-11-13 D. Niebieskikwiat , L. E. Hueso , J. A. Borchers , N. D. Mathur , M. B. Salamon

We have investigated the magnetic response of La0.7Sr0.3MnO3/SrRuO3 superlattices to biaxial in-plane strain applied in-situ. Superlattices grown on piezoelectric substrates of 0.72PbMg1/3Nb2/3O3-0.28PbTiO3(001) (PMN-PT) show strong…

Strongly Correlated Electrons · Physics 2015-04-08 Sujit Das , Andreas Herklotz , Eckhard Pippel , Er-Jia Guo , Diana Rata , Kathrin Dörr

Electric fields can transform materials with respect to their structure and properties, enabling various applications ranging from batteries to spintronics. Recently electrolytic gating, which can generate large electric fields and…

Two dimensional transition metal dichalcogenides (TMDC) have very interesting properties for optoelectronic devices. In this work we theoretically investigate and predict that superlattices comprised of MoS$_{2}$ and WSe$_{2}$ multilayers…

Materials Science · Physics 2013-10-29 Yong-Hong Zhao , Feng Yang , Jian Wang , Hong Guo , Wei Ji

The extraordinary electronic and optical properties of the crystal-to-amorphous transition in phase-change materials led to important developments in memory applications. A promising outlook is offered by nanoscaling such phase-change…

Realizing new classes of ground states in strongly correlated electron systems continues to be at the forefront of condensed matter physics. Heavy-fermion materials, whose electronic structure is essentially three-dimensional, are one of…

Superconductivity · Physics 2016-06-10 Masaaki Shimozawa , Swee K. Goh , Takasada Shibauchi , Yuji Matsuda

Employing a first-principles and model Hamiltonian approach, we work out the electronic properties of polar-polar LaVO$_3$/KTaO$_3$ (LVO/KTO, 001) heterostrctures, with up to six layers of KTO and five layers of LVO. Our analyses indicate…

Materials Science · Physics 2024-08-02 Shubham Patel , Narayan Mohanta , Snehasish Nandy , Subhendra D. Mahanti , A Taraphder

The complex oxide heterostructures such as LaAlO3/SrTiO3 (LAO/STO) interface are paradigmatic platforms to explore emerging multi-degrees of freedom coupling and the associated exotic phenomena. In this study, we reveal the effects of…

Materials Science · Physics 2021-11-10 Weilong Kong , Tong Yang , Jun Zhou , Yong Zheng Luo , Jingsheng Chen , Lei Shen , Yong Jiang , Yuan Ping Feng , Ming Yang

The resistive switching (RS) properties as a function of temperature were studied for Ag/La$_{1-x}$Sr$_x$CoO$_3$ (LSCO) interfaces. The LSCO is a fully-relaxed 100 nm film grown by metal organic deposition on a LaAlO$_3$ substrate. Both low…

Materials Science · Physics 2016-08-03 C. Acha , A. Schulman , M. Boudard , K. Daoudi , T. Tsuchiya

The protection of halide perovskites is important for the performance and stability of emergent perovskite-based optoelectronic technologies. In this work, we investigate the potential inorganic protective coating materials ZnO, SrZrO3, and…

Materials Science · Physics 2022-02-22 Azimatu Fangnon , Marc Dvorak , Ville Havu , Milica Todorovic , Jingrui Li , Patrick Rinke

Dimensionality and electronic correlations are crucial elements of many quantum material properties. An example is the change of the electronic structure accompanied by the loss of quasiparticles when a metal is reduced from three…

We examine the anomalous inverse spin switch behavior in La$_{0.7}$Ca$_{0.3}$MnO$_3$ (LCMO)/YBa$_2$Cu$_3$O$_{7-\delta}$ (YBCO)/LCMO trilayers by combined transport studies and polarized neutron reflectometry. Measuring magnetization…

Mesoscale and Nanoscale Physics · Physics 2012-06-29 Yaohua Liu , C. Visani , N. M. Nemes , M. R. Fitzsimmons , L. Y. Zhu , J. Tornos , M. Zhernenkov , A. Hoffmann , C. Leon , J. Santamaria , S. G. E. te Velthuis

Two-dimensional (2D) perovskite oxide interfaces are ideal systems where diverse emergent properties can be uncovered.The formation and modification of polaronic properties due to short-range strong charge-lattice interactions of 2D…

We show that the growth of the heterostructure LaGaO3/SrTiO3 yields the formation of a highly conductive interface. Our samples were carefully analyzed by high resolution electron microscopy, in order to assess their crystal perfection and…