Zobrazeno 1 - 10
of 660
pro vyhledávání: '"Rozenberg M"'
We study the effect of coupling an electronic reservoir to a Hubbard model and to a Dimer Hubbard Model. This is motivated by recent experiments on the effect of illumination on the insulator-metal transition in a vanadium oxides and photo-conductive
Externí odkaz:
http://arxiv.org/abs/2401.17016
We establish that a doping-driven first-order metal-to-metal transition, from a pseudogap metal to Fermi Liquid, can occur in correlated quantum materials. Our result is based on the exact Dynamical Mean Field Theory solution of the Dimer Hubbard Mod
Externí odkaz:
http://arxiv.org/abs/2109.06572
Autor:
Santander-Syro, A. F., Dai, J., Rödel, T. C., Frantzeskakis, E., Fortuna, F., Weht, R., Rozenberg, M. J.
It was recently discovered that a conductive, metallic state is formed on the surface of some insulating oxides. Firstly observed on SrTiO$_3$(001), it was then found in other compounds as diverse as anatase TiO$_2$, KTaO$_3$, BaTiO$_3$, ZnO, and als
Externí odkaz:
http://arxiv.org/abs/2007.05605
Autor:
Trastoy, J., Camjayi, A., del Valle, J., Kalcheim, Y., Crocombette, J. -P., Villegas, J. E., Rozenberg, M., Ravelosona, D., Schuller, Ivan K.
Publikováno v:
Phys. Rev. B 101, 245109 (2020)
Despite decades of experimental and theoretical efforts, the origin of metal-insulator transitions (MIT) in strongly-correlated materials is one of the main longstanding problems in condensed matter physics. An archetypal example is V2O3, where elect
Externí odkaz:
http://arxiv.org/abs/1808.03528
Autor:
Stinson, H. T., Sternbach, A., Najera, O., Jing, R., Mcleod, A. S., Slusar, T. V., Mueller, A., Anderegg, L., Kim, H. T., Rozenberg, M., Basov, D. N.
We use apertureless scattering near-field optical microscopy (SNOM) to investigate the nanoscale optical response of vanadium dioxide (VO2) thin films through a temperature-induced insulator-to-metal transition (IMT). We compare images of the transit
Externí odkaz:
http://arxiv.org/abs/1711.05242
Publikováno v:
Phys. Rev. B 97, 045108 (2018)
We consider the dimer Hubbard model within Dynamical Mean Field Theory to study the interplay and competition between Mott and Peierls physics. We describe the various metal-insulator transition lines of the phase diagram and the break down of the di
Externí odkaz:
http://arxiv.org/abs/1707.09310
Akademický článek
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Autor:
Backes, S., Rödel, T. C., Fortuna, F., Frantzeskakis, E., Fèvre, P. Le, Bertran, F., Kobayashi, M., Yukawa, R., Mitsuhashi, T., Kitamura, M., Horiba, K., Kumigashira, H., Saint-Martin, R., Fouchet, A., Berini, B., Dumont, Y., Kim, A. J., Lechermann, F., Jeschke, H. O., Rozenberg, M. J., Valentí, R., Santander-Syro, A. F.
Publikováno v:
Phys. Rev. B 94, 241110 (2016)
We study the effect of oxygen vacancies on the electronic structure of the model strongly correlated metal SrVO$_3$. By means of angle-resolved photoemission (ARPES) synchrotron experiments, we investigate the systematic effect of the UV dose on the
Externí odkaz:
http://arxiv.org/abs/1602.06909
Publikováno v:
In Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 15 April 2021 251
Autor:
Rödel, T. C., Fortuna, F., Bertran, F., Gabay, M., Rozenberg, M. J., Santander-Syro, A. F., Fèvre, P. Le
Publikováno v:
Phys. Rev. B 92, 041106(R) (2015)
We report the existence of metallic two-dimensional electron gases (2DEGs) at the (001) and (101) surfaces of bulk-insulating TiO2 anatase due to local chemical doping by oxygen vacancies in the near-surface region. Using angle-resolved photoemission
Externí odkaz:
http://arxiv.org/abs/1507.03916