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Research outline

Triplet spin valve device and behavior of the magnetoresistance: The system is biased by means of non-magnetic leads N1 and N2 having a transverse dimension W. The research activity covers the study of Correlated Systems at Low Dimensionality by means of field theoretical and many-body approaches to describe physical systems like high-temperature superconductors, one-dimensional electron systems (chains and spin ladders, Luttinger liquids) and nanostructures. Recently my research activity has been focused on the study of spin transport in mesoscopic systems like nanotubes, ferromagnetic-superconducting hybrid nanostructures and on the quantum phase transitions in models of interacting boson gases in optical lattices.

Magnetoresistance curves as a function of the superconductor length d s. Differently from an s-wave spin valve, the MR is a non-vanishing function of  d s. My main results regards the development of a non-conventional diagrammatic technique for strongly interacting electron systems, based on the cumulant expansion, while regarding the quantum transport I developed the idea of a quantum pump for quantum information processes.

My research activity develops along the following lines::

  • Study of strongly correlated electron models;
  • Study of magnetic properties of spin ½ chains and ladders;
  • Spin transport properties in mesoscopic systems in nanostructures;
  • Interacting quantum gases: interaction, disorder and transport effects.

Research groups:

Dott.ssa Roberta Citro



R. Citro, F. Romeo, M. Marinaro, “Zero-conductance resonances and spin filtering effects in ring conductors subject to Rashba coupling”,Physical Review B 74, 115329-115336 (2006)

M. Klanjsek, H. Mayaffre,  C. Berthier, M. Horvatic, B. Chiari, O. Piovesana, P. Bouillot, C. Kollath, E. Orignac, R. Citro,  and T. Giamarchi, “Controlling Luttinger Liquid Physics in Spin Ladders under a Magnetic Field”, Physical Review Letters 101, 137207 (2008)

M. Cazalilla, R. Citro, T. Giamarchi, E. Orignac, M. Rigol, “One dimensional bosons: From condensed matter systems to ultracold gases”, Reviews of Modern Physics 83, 1045 (2011)

F. Romeo, R. Citro, Cooper pairs spintronics in triplet spin valves, Physical Review Letters111, 226801 (2013)

J.S. Bernier, R. Citro, C. Kollath, E. Orignac, “Correlation dynamics during a slow interaction quench in one dimensional Bose gas”, Physical Review Letters 112, 065301 (2014)

R. Citro ; C. Noce ; S. Pagano ; F. Forte ; V. Granata ; A. Leo, Superconductivity and functional oxides, THE EUROPEAN PHYSICAL JOURNAL. SPECIAL TOPICS. Vol. 228. Pag.625-629  (2019)





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