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34 p, 4.7 MB |
Conducting chiral nickel(ii) bis(dithiolene) complexes : Structural and electron transport modulation with the charge and the number of stereogenic centres
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Abhervé, Alexandre (Université d'Angers) ;
Mroweh, Nabil (Université d'Angers) ;
Cauchy, Thomas (Université d'Angers) ;
Pop, Flavia (Université d'Angers) ;
Cui, HengBo (Condensed Molecular Materials Laboratory. RIKEN) ;
Kato, Reizo (Condensed Molecular Materials Laboratory. RIKEN) ;
Vanthuyne, Nicolas (Aix-Marseille Université) ;
Alemany, Pere (Universitat de Barcelona. Departament de Ciència de Materials i Química Física) ;
Canadell Casanova, Enric 1950- (Institut de Ciència de Materials de Barcelona) ;
Avarvari, Narcis (Université d'Angers)
Nickel(ii) bis(dithiolene) complexes can provide crystalline conducting materials either in their monoanionic or neutral forms. Here we show that the use of chiral dithiolene ligands with one or two stereogenic centres, together with variation of the counter-ion in the anionic complexes, represents a powerful strategy to modulate the conducting properties of such molecular materials. [...]
2021 -  10.1039/d1tc00439e
Journal of Materials Chemistry C, Vol. 9, Issue 12 (March 2021) , p. 4119-4140
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16 p, 13.4 MB |
Polarization dependence of angle-resolved photoemission with submicron spatial resolution reveals emerging one-dimensionality of electrons in NbSe3
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Valbuena, Miguel Ángel (Institut Català de Nanociència i Nanotecnologia) ;
Chudzinski, P. (Institute for Theoretical Physics) ;
Pons, S. (École Polytechnique Fédérale de Lausanne) ;
Conejeros, Sergio (Universidad Católica Del Norte. Departamento de Química) ;
Alemany, Pere (Universitat de Barcelona. Departament de Ciència de Materials i Química Física) ;
Canadell Casanova, Enric 1950- (Institut de Ciència de Materials de Barcelona) ;
Berger, H. (École Polytechnique Fédérale de Lausanne) ;
Frantzeskakis, E. (Synchrotron SOLEIL) ;
Avila, J. (Synchrotron SOLEIL) ;
Asensio, M. C. (Synchrotron SOLEIL) ;
Giamarchi, T. (University of Geneva. Department of Quantum Matter Physics) ;
Grioni, M. (École Polytechnique Fédérale de Lausanne)
In materials with nearly commensurate band filling the electron liquid may spontaneously separate into components with distinct properties, yielding complex intra-and interunit cell ordering patterns and a reduced dimensionality. [...]
2019 - 10.1103/PhysRevB.99.075118
Physical review B, Vol. 99, Issue 7 (February 2019) , art. 75118
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18 p, 4.7 MB |
Quasiparticle spectra of 2H-NbSe2 : two-band superconductivity and the role of tunneling selectivity
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Noat, Y. (Institut des Nanosciences de Paris) ;
Silva-Guillén, Jose Angel (Institut Català de Nanociència i Nanotecnologia) ;
Cren, T. (Institut des Nanosciences de Paris) ;
Cherkez, V. (Institut des Nanosciences de Paris) ;
Brun, C. (Institut des Nanosciences de Paris) ;
Pons, S. (Institut des Nanosciences de Paris) ;
Debontridder, F. (Institut des Nanosciences de Paris) ;
Roditchev, D. (Institut des Nanosciences de Paris) ;
Sacks, W. (Université Paris 6) ;
Cario, L. (Institut des Matériaux Jean Rouxel) ;
Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia) ;
Garcia, Alberto (Institut de Ciència de Materials de Barcelona) ;
Canadell Casanova, Enric 1950- (Institut de Ciència de Materials de Barcelona)
We have studied the superconducting state of 2H-NbSe2 by scanning tunneling spectroscopy along two different crystal orientations, the c and the a/b axes. Along the c axis a large gap is dominant in the spectra, while a smaller gap is measured along the a/b axis. [...]
2015 - 10.1103/PhysRevB.92.134510
Physical review B : Condensed matter and materials physics, Vol. 92, Issue 13 (October 2015) , art. 134510
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8 p, 1.5 MB |
Tunneling and electronic structure of the two-gap superconductor MgB2
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Silva-Guillén, Jose Angel (Institut Català de Nanociència i Nanotecnologia) ;
Noat, Y. (Institut des Nanosciences de Paris) ;
Cren, T. (Institut des Nanosciences de Paris) ;
Sacks, W. (Institut des Nanosciences de Paris) ;
Canadell Casanova, Enric 1950- (Institut de Ciència de Materials de Barcelona) ;
Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia)
A combined experimental (superconductor-insulator-superconductor tunneling spectra) and theoretical (density functional theory) study of the two-gap superconductor MgB2 is reported. The calculations confirm that the small gap is associated with a π band mostly based on the boron pz orbitals leading to the three-dimensional band component of the Fermi surface. [...]
2015 - 10.1103/PhysRevB.92.064514
Physical review B : Condensed matter and materials physics, Vol. 92, Issue 6 (August 2015) , art. 64514
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16 p, 836.4 KB |
Coexistence of elastic modulations in the charge density wave state of 2H-NbSe₂
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Guster, Bogdan (Institut Català de Nanociència i Nanotecnologia) ;
Rubio Verdú, Carmen (CIC NanoGUNE700) ;
Robles, Roberto (Institut Català de Nanociència i Nanotecnologia) ;
Zaldívar, Javier (CIC NanoGUNE) ;
Dreher, Paul (Donostia International Physics Center) ;
Pruneda, Miguel (Institut Català de Nanociència i Nanotecnologia) ;
Silva-Guillén, Jose Angel (Wuhan University. School of Physics and Technology) ;
Choi, Deung-Jang (Donostia International Physics Center) ;
Pascual, José I. (CIC NanoGUNE) ;
Ugeda, Miguel M. (CIC NanoGUNE) ;
Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia) ;
Canadell Casanova, Enric 1950- (Institut de Ciència de Materials de Barcelona)
Bulk and single-layer 2H-NbSe₂ exhibit identical charge density wave order (CDW) with a quasi-commensurate 3 × 3 superlattice periodicity. Here we combine scanning tunnelling microscopy (STM) imaging at T = 1 K of 2H-NbSe₂ with first-principles density functional theory (DFT) calculations to investigate the structural atomic rearrangement of this CDW phase. [...]
2019 - 10.1021/acs.nanolett.9b00268
Nano letters, Vol. 19, issue 5 (May 2019) , p. 3027-3032
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8 p, 3.1 MB |
2 × 2 charge density wave in single-layer TiTe₂
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Guster, Bogdan (Institut Català de Nanociència i Nanotecnologia) ;
Robles, Roberto (Institut Català de Nanociència i Nanotecnologia) ;
Pruneda, Miguel (Institut Català de Nanociència i Nanotecnologia) ;
Canadell Casanova, Enric 1950- (Institut de Ciència de Materials de Barcelona) ;
Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia)
A density functional theory study concerning the origin of the recently reported 2 × 2 charge density wave (CDW) instability in single-layer TiTe₂ is reported. It is shown that, whereas calculations employing the semi-local functional PBE favor the undistorted structure, the hybrid functional HSE06 correctly predicts a 2 × 2 distortion. [...]
2019 - 10.1088/2053-1583/aaf20b
2D Materials, Vol. 6, issue 1 (Jan. 2019) , art. 15027
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15 p, 6.3 MB |
Evidence for the weak coupling scenario of the Peierls transition in the blue bronze
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Guster, Bogdan (Institut Català de Nanociència i Nanotecnologia) ;
Pruneda, Miguel (Institut Català de Nanociència i Nanotecnologia) ;
Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia) ;
Canadell Casanova, Enric 1950- (Institut de Ciència de Materials de Barcelona) ;
Pouget, Jean-Paul (Université Paris-Sud. Laboratoire de Physique des Solides)
On the basis of first-principles DFT calculations the wave-vector and temperature dependencies of the Lindhard response function of the blue bronze K₀. ₃MoO₃ have been calculated. The kFI+kFII interband component of the response, which is responsible for the Peierls instability, has been quantitatively analyzed. [...]
2019 - 10.1103/PhysRevMaterials.3.055001
Physical review materials, Vol. 3, issue 5 (May 2019) , art. 55001
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26 p, 1.0 MB |
Nanotexturing to Enhance Photoluminescent Response of Atomically Thin Indium Selenide with Highly Tunable Band Gap
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Brotons Gisbert, Mauro (Universitat de València) ;
Andrés Penares, Daniel (Universitat de València) ;
Suh, Joonki (University of California. Department of Materials Science and Engineering) ;
Hidalgo, Francisco (Institut Català de Nanociència i Nanotecnologia) ;
Abargues, Rafael (Intenanomat S. L.) ;
Rodríguez Cantó, Pedro J. (Intenanomat S.L.) ;
Segura, Alfredo (Universitat de València) ;
Cros, Ana (Universitat de València) ;
Tobias, Gerard (Institut de Ciència de Materials de Barcelona) ;
Canadell Casanova, Enric 1950- (Institut de Ciència de Materials de Barcelona) ;
Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia) ;
Wu, Junqiao (University of California. Department of Materials Science and Engineering) ;
Martínez Pastor, Juan P. (Universitat de València) ;
Sánchez Royo, Juan F. (Universitat de València)
Manipulating properties of matter at the nanoscale is the essence of nanotechnology, which has enabled the realization of quantum dots, nanotubes, metamaterials, and two-dimensional materials with tailored electronic and optical properties. [...]
2016 - 10.1021/acs.nanolett.6b00689
Nano letters, Vol. 16, Issue 5 (April 2016) , p. 3221-3229
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