Oxides for new-generation electronics

Thermal evolution of ferroelectric behavior in epitaxial Hf0.5Zr0.5O2

Written by icmab on 15 December 2020.

Título : Thermal evolution of ferroelectric behavior in epitaxial Hf_0.5Zr_0.5O₂

Autores: J. W. Adkins, I. Fina, F. Sánchez, S. R. Bakaul, and J. T. Abiade

Citation:

Appl. Phys. Lett. 117, 142902 (2020)
DOI: https://doi.org/10.1063/5.0015547

PlumX: Thermal evolution of ferroelectric behavior in epitaxial Hf0.5Zr0.5O2

Herein, we report a cryogenic-temperature study on the evolution of the ferroelectric properties of epitaxial Hf_0.5Zr_0.5O₂ thin films on silicon. Wake-up, endurance, and fatigue of these films are found to be intricately correlated, strongly hysteretic, and dependent on available thermal energy.

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Engineering Polar Oxynitrides: Hexagonal Perovskite BaWON2

Written by icmab on 11 December 2020.

Título : Engineering Polar Oxynitrides: Hexagonal Perovskite BaWON₂

Autores: Dr. Judith Oró‐Solé, Dr. Ignasi Fina, Dr. Carlos Frontera, Dr. Jaume Gàzquez, Dr. Clemens Ritter, Marina Cunquero, Dr. Pablo Loza‐Alvarez, Dr. Sergio Conejeros, Prof. Pere Alemany, Prof. Enric Canadell, Prof. Josep Fontcuberta, Prof. Amparo Fuertes.

Citation: Angew. Chem. Int. Ed. 2020, 59, 18395 – 18399.
DOI: https://doi.org/10.1002/ange.202006519

PlumX: Engineering Polar Oxynitrides: Hexagonal Perovskite BaWON2

Non‐centrosymmetric polar compounds have important technological properties. Reported perovskite oxynitrides show centrosymmetric structures, and for some of them high permittivities have been observed and ascribed to local dipoles induced by partial order of nitride and oxide.

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Mechanical Softness of Ferroelectric 180° Domain Walls

Written by icmab on 02 December 2020.

Autores: Christina Stefani, Louis Ponet, Konstantin Shapovalov, Peng Chen, Eric Langenberg, Darrell G. Schlom, Sergey Artyukhin, Massimiliano Stengel, Neus Domingo, and Gustau Catalan.

Citation: Phys. Rev. X 10, 041001 – Published 1 October 2020
DOI:https://doi.org/10.1103/PhysRevX.10.041001

PlumX: Mechanical Softness of Ferroelectric 180° Domain Walls

Using scanning probe microscopy, we measure the out-of-plane mechanical response of ferroelectric 180° domain walls and observe that, despite separating domains that are mechanically identical, the walls appear mechanically distinct—softer—compared to the domains.

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Discovery of highly polarizable semiconductors BaZrS3 and Ba3Zr2S7

Written by icmab on 27 November 2020.

Título : Discovery of highly polarizable semiconductors BaZr S₃ and Ba₃ Zr₂ S₇

Autores: Stephen Filippone, Boyang Zhao, Shanyuan Niu, Nathan Z. Koocher, Daniel Silevitch, Ignasi Fina, James M. Rondinelli, Jayakanth Ravichandran, and R. Jaramillo.

Citation: Phys. Rev. Materials 4, 091601(R) – Published 8 September 2020.
DOI: https://doi.org/10.1103/PhysRevMaterials.4.091601

PlumX: Discovery of highly polarizable semiconductors BaZrS3 and Ba3Zr2S7

There are few known semiconductors exhibiting both strong optical response and large dielectric polarizability. Inorganic materials with large dielectric polarizability tend to be wide-band gap complex oxides. Semiconductors with a strong photoresponse to visible and infrared light tend to be weakly polarizable. Interesting exceptions to these trends are halide perovskites and phase-change chalcogenides.

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Magnetic droplet solitons

Written by icmab on 10 November 2020.

Autores: Ferran Macià, and Andrew D. Kent.

Citation: Journal of Applied Physics
https://doi.org/10.1063/5.0018251

PlumX: Magnetic droplet solitons

Magnetic droplet solitons are dynamical magnetic textures that form due to an attractive interaction between spin waves in thin films with perpendicular magnetic anisotropy. Spin currents and the spin torques associated with these currents enable their formation as they provide a means to excite non-equilibrium spin-wave populations and compensate their decay.

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Epitaxial Ferroelectric La-doped Hf0.5Zr0.5O2 Thin Films

Written by icmab on 03 November 2020.

Título : Epitaxial Ferroelectric La-Doped Hf_0.5Zr_0.5O₂ Thin Films

Autores: Tingfeng Song, Romain Bachelet, Guillaume Saint-Girons, Raul Solanas, Ignasi Fina, and Florencio Sanchez

Citation: ACS Appl. Electron. Mater. 2020
Publication Date: September 14, 2020
https://doi.org/10.1021/acsaelm.0c00560

PlumX: Epitaxial Ferroelectric La-doped Hf0.5Zr0.5O2 Thin Films

Doping ferroelectric Hf_0.5Zr_0.5O₂ with La is a promising route to improve endurance. However, the beneficial effect of La on the endurance of polycrystalline films may be accompanied by degradation of the retention. We have investigated the endurance - retention dilemma in La-doped epitaxial films.

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Conductivity control via minimally invasive anti-Frenkel defects in a functional oxide

Written by icmab on 23 October 2020.

Autores: Donald M. Evans, Theodor S. Holstad, Aleksander B. Mosberg, Didrik R. Småbråten, Per Erik Vullum, Anup L. Dadlani, Konstantin Shapovalov, Zewu Yan, Edith Bourret, David Gao, Jaakko Akola, Jan Torgersen, Antonius T. J. van Helvoort, Sverre M. Selbach & Dennis Meier.

Citation: Nat. Mater. (2020)
https://doi.org/10.1038/s41563-020-0765-x

PlumX: Conductivity control via minimally invasive anti-Frenkel defects in a functional oxide

Utilizing quantum effects in complex oxides, such as magnetism, multiferroicity and superconductivity, requires atomic-level control of the material’s structure and composition. In contrast, the continuous conductivity changes that enable artificial oxide-based synapses and multiconfigurational devices are driven by redox reactions and domain reconfigurations, which entail long-range ionic migration and changes in stoichiometry or structure.

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On the Promotion of Catalytic Reactions by Surface Acoustic Waves

Written by icmab on 25 September 2020.

Surface acoustic waves (SAW) allow to manipulate surfaces with potential applications in catalysis, sensor and nanotechnology. SAWs were shown to cause a strong increase in catalytic activity and selectivity in many oxidation and decomposition reactions on metallic and oxidic catalysts.

Hits: 253

Fatigue and retention in the growth window of ferroelectric Hf0.5Zr0.5O2 thin films

Written by icmab on 22 September 2020.

Título : Fatigue and retention in the growth window of ferroelectric Hf_0.5Zr_0.5O₂ thin films

Autores: Jike Lyu, Ignasi Fina, and Florencio Sánchez.
Appl. Phys. Lett. 117, 072901 (2020)
DOI: 10.1063/5.0017738

The growth window of epitaxial Hf_0.5Zr_0.5O₂ is established taking into account the main ferroelectric properties that films have to present simultaneously: high remanent polarization, low fatigue, and long retention.

Hits: 388

Visualization of moiré superlattices

Written by icmab on 18 September 2020.

Moiré superlattices in van der Waals heterostructures have given rise to a number of emergent electronic phenomena due to the interplay between atomic structure and electron correlations. Indeed, electrons in these structures have been recently found to exhibit a number of emergent properties that the individual layers themselves do not exhibit.

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Blocking of Conducting Channels Widens Window for Ferroelectric Resistive Switching in Interface‐Engineered Hf0.5Zr0.5O2 Tunnel Devices

Written by icmab on 21 July 2020.

Electroresistance is the functional property of resistive switching devices exploited in data storage and computing.

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Siesta: Recent developments and applications

Written by icmab on 07 July 2020.

A review of the present status, recent enhancements, and applicability of the Siesta program is presented. Since its debut in the mid-1990s, Siesta’s flexibility, efficiency, and free distribution have given advanced materials simulation capabilities to many groups worldwide.

Hits: 496

Weak localization competes with the quantum oscillations in a natural electronic superlattice: The case of Na1.5(PO2)4(WO3)20

Written by icmab on 03 July 2020.

We report an investigation of the combined structural and electronic properties of the bronze ${Na}_{1.5} {({PO}_{2})}_{4} {({WO}_{3})}_{20}$ .

Hits: 425

Photoinduced persistent electron accumulation and depletion in LaAlO3/SrTiO3 quantum wells

Written by icmab on 23 June 2020.

Spike-timing dependent plasticity (STDP) is a fundamental concept in neurobiology. Briefly, the relative timing of two neuron spikes reinforces or weakens the synapse between them, so that events caused by another should trigger spikes in a particular time order.

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Local manipulation of metamagnetism by strain nanopatterning

Written by icmab on 19 June 2020.

Near any phase transition order parameters of materials are strongly coupled to materials’ properties. Metamagnetic materials show phase transition between two magnetically ordered phases.

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High polarization, endurance and retention in sub-5 nm Hf0.5Zr0.5O2 films

Written by Jags on 05 June 2020.

Ferroelectric HfO₂ is a promising material for new memory devices, but significant improvement of important properties is necessary to reach applications. However, precedent literature shows that a dilemma between polarization, endurance and retention exists.

Hits: 514

Domain-Matching Epitaxy of Ferroelectric Hf0.5Zr0.5O2(111) on La2/3Sr1/3MnO3(001)

Written by Jags on 22 May 2020.

Epitaxial ferroelectric HfO₂ films are the most suitable to investigate intrinsic properties of the material and for prototyping emerging devices. Ferroelectric Hf_0.5Zr_0.5O₂(111) films were epitaxially stabilized on La_2/3Sr_1/3MnO₃(001) electrodes.

Hits: 645

Nanoscale rotational dynamics of four independent rotators confined in crowded crystalline layers

Written by icmab on 12 May 2020.

We report a study where Car–Parrinello molecular dynamics simulations and variable-temperature (30–300 K) ¹H spin–lattice relaxation time experiments nicely complement each other.

Hits: 451

In operando adjustable orbital polarization in LaNiO3 thin films

Written by icmab on 08 May 2020.

The different occupancy of electronic orbitals, the so-called orbital polarization, is a key parameter determining electric and magnetic properties of materials.

Hits: 569

Strain control of the competition between metallic and semiconducting states in single-layers of TaSe3

Written on 01 May 2020.

José Ángel Silva-Guillén and Enric Canadell. 2D Materials, Volume 7, Number 2.

Hits: 427

Flexible Antiferromagnetic FeRh Tapes as Memory Elements

Written on 28 April 2020.

Ignasi Fina*, Nico Dix, Enric Menéndez, Enric Menéndez, Anna Crespi, Michael Foerster, Lucia Aballe, Florencio Sánchez, Josep Fontcuberta*. ACS Appl. Mater. Interfaces 2020, XXXX, XXX, XXX-XXX. Publication Date:March 9, 2020

Hits: 430

Generation and imaging of magnetoacoustic waves over millimeter distances

Written on 14 April 2020.

Blai Casals, Nahuel Statuto, Michael Foerster, Alberto Hernández-Mínguez, Rafael Cichelero, Peter Manshausen, Ania Mandziak, Lucía Aballe, Joan Manel Hernàndez, and Ferran Macià. Phys. Rev. Lett.

Hits: 363

Structural, magnetic and electronic properties of EuTi0.5W0.5O3-xNx perovskite oxynitrides

Written on 10 April 2020.

Judith Oró-Solé, Carlos Frontera, Ashley P. Black, Augustin Castets, Karen L.Velásquez-Méndez, Josep Fontcuberta, Amparo Fuertes. Journal of Solid State Chemistry Volume 286, June 2020, 121274.

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Magneto-ionic control of magnetism in two-oxide nanocomposite thin films comprising mesoporous cobalt ferrite conformally nanocoated with HfO2

Written on 24 March 2020.

Shauna Robbennolt,* Pengmei Yu, Aliona Nicolenco, Pau Mercier Fernandez, Mariona Coll and Jordi Sort. Nanoscale, 2020, Advance Article.

Hits: 340

Nitride tuning of transition metal perovskites

Written on 06 March 2020.

Amparo Fuertes. APL Materials 8, 020903 (2020);

Hits: 585

Atomistic simulations of COSAN: amphiphiles without a Head‐and‐Tail design have a “head and tail” surfactant behavior

Written by icmab on 04 February 2020.

David C Malaspina, Clara Viñas, Francesc Teixidor, Jordi Faraudo. Angew. Chem. Int. Ed.. Accepted Author Manuscript.

Hits: 343

Electric-field-induced avalanches and glassiness of mobile ferroelastic twin domains in cryogenic SrTi O 3

Written by icmab on 28 January 2020.

Blai Casals, Sebastiaan van Dijken, Gervasi Herranz, and Ekhard K. H. Salje. Phys. Rev. Research 1, 032025(R) – Published 26 November 2019.

Hits: 279

Unraveling Ferroelectric Polarization and Ionic Contributions to Electroresistance in Epitaxial Hf0.5Zr0.5O2 Tunnel Junctions

Written by icmab on 17 January 2020.

Milena Cervo Sulzbach, Saúl Estandía, Xiao Long, Jike Lyu, Nico Dix, Jaume Gàzquez, Matthew F. Chisholm, Florencio Sánchez, Ignasi Fina, Josep Fontcuberta. Adv. Electron. Mater.2019, 1900852.

Hits: 374

Rotational polarization nanotopologies in BaTiO3/SrTiO3 superlattices

Written by icmab on 07 January 2020.

Saúl Estandía, Florencio Sánchez,* Matthew F. Chisholm and Jaume Gázquez. Nanoscale, 2019, Advance Article.

Hits: 842

Chiral EDT-TTF precursors with one stereogenic centre: substituent size modulation of the conducting properties in the (R-EDT-TTF)2PF6 (R = Me or Et) series

Written by icmab on 27 December 2019.

Nabil Mroweh, Pascale Auban-Senzier, Nicolas Vanthuyne, Enric Canadell and Narcis Avarvari*. J. Mater. Chem. C, 2019,7, 12664-12673.

Hits: 516

Double-cell superstructure and vacancy ordering in tensile-strained metallic thin films of Pr0.50Ca0.50 CoO 3 on LaAlO3

Written by icmab on 24 December 2019.

Jessica Padilla-Pantoja, Xavier Torrelles, Jaume Gazquez, Juan Rubio-Zuazo, Javier Blasco, Javier Herrero-Martín, and Jose Luis García-Muñoz. Phys. Rev. Materials 3, 104407.

Hits: 639

Surface charged species and electrochemistry of ferroelectric thin films

Written by icmab on 29 November 2019.

Neus Domingo, Iaroslav Gaponenko, Kumara Cordero-Edwards, Nicolas Stucki, Virginia Pérez-Dieste, Carlos Escudero, Elzbieta Pach, Albert Verdaguer and Patrycja Paruch. Nanoscale, 2019,11, 17920-17930.

Hits: 798

Organic Free Radicals as Circularly Polarized Luminescence Emitters

Written by icmab on 15 November 2019.

Mayorga Burrezo, P. , Jiménez, V. G., Blasi, D. , Ratera, I. , Campaña, A. G. and Veciana, J. (2019), Angew. Chem. Int. Ed.

Hits: 841

Direct Reversible Magnetoelectric Coupling in a Ferroelectric/Ferromagnetic Structure Controlled by Series Resistance Engineering

Written by icmab on 07 November 2019.

Sergio González-Casal, Ignasi Fina*, Florencio Sánchez, Josep Fontcuberta, ACS Appl. Electron. Mater. 2019191937-1944. Publication Date: September 2, 2019

Hits: 810

Trapping and electrical characterization of single core/shell iron-based nanoparticles in self-aligned nanogaps

Written by icmab on 29 October 2019.

Jacqueline Labra-Muñoz,Zorica Konstantinović, Lluis Balcells, Alberto Pomar, Herre S. J. van der Zant, and Diana Dulić. Appl. Phys. Lett. 115, 063104 (2019);

Hits: 839

Resistive Switching in Semimetallic SrIrO3 Thin Films

Written by icmab on 24 October 2019.

Víctor Fuentes, Borislav Vasić, Zorica Konstantinović, Benjamín Martínez, Lluís Balcells, Alberto Pomar*. ACS Appl. Electron. Mater.2019.

Hits: 662

Spin ordering and physical properties of NaPrFeWO6 and NaSmFeWO6 with polar double perovskite structure

Written by icmab on 21 October 2019.

J. Blasco, J. A. Rodríguez-Velamazán, G. Subías, J. L. García-Muñoz, J. Stankiewicz, J. García. Acta Materialia Volume 176, 1 September 2019, Pages 53-62.

Hits: 787

Spontaneous in-flight assembly of magnetic nanoparticles into macroscopic chains

Written by icmab on 18 October 2019.

Lluis Balcells, Igor Stanković,* Zorica Konstantinović, Aanchal Alagh, Victor Fuentes, Laura López-Mir, Judit Oró, Narcis Mestres, Carlos García, Alberto Pomar and Benjamin Martínez. Nanoscale, 2019,11, 14194-14202.

Cover, Oxides, 2019

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2D Molecular Superconductor to Insulator Transition in the β′′-(BEDT-TTF)2[(H2O)(NH4)2M(C2O4)3]·18-crown-6 Series (M = Rh, Cr, Ru, Ir)

Written by icmab on 08 October 2019.

Alexander L. Morritt, Jordan R. Lopez ,Toby J. Blundell, Enric Canadell, Hiroki Akutsu, Yasuhiro Nakazawa, Shusaku Imajo, Lee Martin*. Inorg. Chem.2019581610656-10664. Publication Date:August 5, 2019

Hits: 696

Tailoring the crystal growth of quartz on silicon for patterning epitaxial piezoelectric films

Written by icmab on 04 October 2019.

Qianzhe Zhang, David Sánchez-Fuentes, Andrés Gómez, Rudy Desgarceaux, Benoit Charlot, Jaume Gàzquez, Adrián Carretero-Genevrier* and Martí Gich*. Nanoscale Adv., 2019, Advance Article

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