Now showing items 1-12 of 302

    • Ionic polaron in a Bose-Einstein condensate 

      Astrakharchik, Grigori; Schmidt, Richard (2021-05-11)
      Article
      Open Access
      The presence of strong interactions in a many-body quantum system can lead to a variety of exotic effects. Here we show that even in a comparatively simple setup consisting of a charged impurity in a weakly interacting ...
    • Structural superfluid-Mott-insulator transition for a Bose gas in multirods 

      Rodríguez López, Omar Abel; Boronat Medico, Jordi (American Physical Society, 2021-01-14)
      Article
      Open Access
      We report on a structural superfluid–Mott-insulator (SF-MI) quantum phase transition for an interacting one-dimensional Bose gas within permeable multirod lattices, where the rod lengths are varied from zero to the lattice ...
    • Bridging NiCo layered double hydroxides and Ni3S2 for bifunctional electrocatalysts: the role of vertical graphene 

      Xiao, Zhang; Fan, Jiajun; Lu, Xunyu; Han, Zhaojun; Cazorla Silva, Claudio; Hu, Long; Wu, Tom; Chu, Dewei (2021-07-01)
      Article
      Restricted access - publisher's policy
      In this work, we report a bifunctional electrocatalyst with nickel sulphide (Ni3S2) as the template, vertical graphene (VG) as the bridging material, and nickel–cobalt layered double hydroxides (NiCo LDHs) nanosheets as ...
    • Superfluid vortex dynamics on a torus and other toroidal surfaces of revolution 

      Guenther, Nils Eric; Massignan, Pietro Alberto; Fetter, Alexander L. (American Physical Society (APS), 2020-05-04)
      Article
      Open Access
      The superfluid flow velocity is proportional to the gradient of the phase of the superfluid order parameter, leading to the quantization of circulation around a vortex core. In this work, we study the dynamics of a ...
    • Universal dimerized quantum droplets in a one-dimensional lattice 

      Morera Navarro, Iván; Astrakharchik, Grigori; Polls Martí, Artur; Julia Diaz, Bruno (American Institute of Physics (AIP), 2021-01-11)
      Article
      Open Access
      The ground-state properties of two-component bosonic mixtures in a one-dimensional optical lattice are studied both from few- and many-body perspectives. We rely directly on a microscopic Hamiltonian with attractive ...
    • Enhancement of phase stability and optoelectronic performance of BiFeO3 thin films via cation co-substitution 

      Machado, Pamela; Caño, Ivan; Menendez Muniz, Cesar; Cazorla Silva, Claudio; Tan, Huan; Fina, Ignasi; Campoy Quiles, Marioano; Escudero, Carlos; Tallarida, Massimo; Coll, Mariona (Royal Society of Chemistry (RSC), 2021-01-07)
      Article
      Open Access
      Compositional engineering of BiFeO3 can significantly boost its photovoltaic performance. Therefore, controlling site substitution and understanding how it affects the optical and electronic properties while achieving ...
    • Nature of alkali ion conduction and reversible Na-ion storage in hybrid formate framework materials 

      Polek, Anna; Cazorla Silva, Claudio; Kundu, Dipan (2020-12-10)
      Article
      Restricted access - publisher's policy
      The cost advantage of Na-ion batteries has spurred intensive research effort in the last ten years to develop reversible Na+ storage materials. While classic host materials – analogous to the Liion system – are potentially ...
    • Giant thermal enhancement of the electric polarization in ferrimagnetic BiFe_{1-x}Co_{x}O_{3} solid solutions near room temperature 

      Menendez Muniz, Cesar; Cazorla Silva, Claudio (American Institute of Physics (AIP), 2020-09-11)
      Article
      Open Access
      Thermal excitations typically reduce the electric polarization in ferroelectric materials. Here, we show by means of first-principles calculations that multiferroic BiFe 1 - x Co x O 3 solid solutions with 0.25 = x = 0.50 ...
    • Amplitude death and restoration in networks of oscillators with random-walk diffusion 

      Clusella Coberó, Pau; Pastor Satorras, Romualdo (2021-01-26)
      Article
      Open Access
      Systems composed of reactive particles diffusing in a network display emergent dynamics. While Fick’s diffusion can lead to Turing patterns, other diffusion schemes might display more complex phenomena. Here we study the ...
    • Effect of the water model in simulations of protein–protein recognition and association 

      Emperador Badimon, Agustín; Crehuet Simón, Ramon; Guàrdia Manuel, Elvira (Multidisciplinary Digital Publishing Institute (MDPI), 2021-01-06)
      Article
      Open Access
      We study self-association of ubiquitin and the disordered protein ACTR using the most commonly used water models. We find that dissociation events are found only with TIP4P-EW and TIP4P/2005, while the widely used TIP3P ...
    • Trapped Bose-Bose mixtures at finite temperature: a quantum Monte Carlo approach 

      Dželalija, K.; Cikojevic, V.; Boronat Medico, Jordi; Vranješ Markic, Leandra (American Physical Society, 2020-12-04)
      Article
      Open Access
      We study thermal properties of a trapped Bose-Bose mixture in a dilute regime using quantum Monte Carlo methods. Our main aim is to investigate the dependence of the superfluid density and the condensate fraction on ...
    • Microscopic interactions of melatonin, serotonin and tryptophan with zwitterionic phospholipid membranes 

      Martí Rabassa, Jordi; Lu, Huixia (2021-03-11)
      Article
      Open Access
      The interactions at the atomic level between small molecules and the main components of cellular plasma membranes are crucial for elucidating the mechanisms allowing for the entrance of such small species inside the cell. ...