Leandro Tosi

Project MASSS – Marie-Sklodowska Curie Action by Leandro Tosi

About Me

 

Hello! My name is Leandro Tosi, I'm an Argentinian physicist born in December 1986. I got my physics degree from Balseiro Institute in Argentine and did my PhD under the supervision of Armando Aligia and Hernán Pastoriza in Bariloche. I have been running a Marie-Sklodowska Curie Action from Dec 2016 to Dec 2018 in the Quantronics Group. Here you can learn about me, my publications, my past activities and other interests.  

Basic Data

Date of Birth: December 1st, 1986 || Nationality: Argentinian

e-mail: tosi.lea@gmail.com // leandro.tosi@cea.fr

 

Professional

2016-present

Postdoc at Quantronics Group in Service de Physique de l’Etat Condensé (SPEC), CEA, France.

Work on the spin properties of Andreev States. Project: “Manipulation of a Single Spin in a Superconductor” with founding from Marie-Sklodowska Curie Fellowship.

2015-2016

 

Postdoc at Laboratoire de Physique de Solides, Centre des Sciences Nucléaires et Sciences de la Matière (CSNSM), Université de Paris-Sud, Orsay, France.

Work in the Group of Hélène le Sueur in the development of low temperature quantum detectors for Astrophysics applications.

 

Education

PhD in Physics

(Apr 2011-Jun 2015)

Degree obtained at Instituto Balseiro, Bariloche, Argentina.

PhD: “Interference and electron-phonon coupling in the transport properties of strongly correlated nanoscopic systems”.
Advisor: Dr. Armando A. Aligia. Collaboration: Dr. Hernán Pastoriza. Low Temperatures Laboratory and Solid State Theory Group at Centro Atómico Bariloche.

Awards: Honorific mention from the thesis evaluation board for the effort in developing experimental physics and doing high-quality theoretical contributions.

Master of Science in Physics

(Aug 2009-Dec 2010)

MSc Degree obtained in December 2010 at Instituto Balseiro, Bariloche, Argentina.

MSc Thesis: Transport through nanoscopic systems out of equilibrium.
Advisors: Dr. Armando A. Aligia & Dr. Ana María Llois. Solid State Theory Group (Centro Atómico Bariloche, Bariloche, Argentina) & Condensed Matter Group (Phys. Dept., Centro Atómico Constituyentes, Buenos Aires, Argentina).

Bachelor of Science in Physics

(Apr 2004-Dec 2009)

BSc Degree obtained in December 2009 at Instituto Balseiro, Bariloche, Argentina.

BSc Dissertation: Many-Body Problems Out of Equilibrium.
Advisor: Dr. Armando A. Aligia. Solid State Theory Group, Centro Atómico Bariloche.

 

Scholarships

2016-2018

Grant from Marie Skłodowska-CurieActions (H2020-MSCA-IF-2015) from the 1st December 2016.

2011-2015

CONICET (National Research Council) to obtain PhD in Physics at Instituto Balseiro, Bariloche, Argentina.

2007-2010

Comisión Nacional de Energía Atómica (Presidence of the Argentinian Nation) to obtain the Master of Science Degree at Instituto Balseiro, Bariloche, Argentina.

 

Publications

18 articles in peer-reviewed journals, 8 as first author, 147 citations (without self-citations), h-index=9 (Source: Web of Science, 14/09/2018)

2019

Spin-orbit splitting of Andreev States revealed by microwave spectroscopy

L. Tosi, C. Metzger, M. Goffman, H. Pothier and C. Urbina, S. Park and A. L. Yeyati, J. Nygard and P. Krogstrup, Phys. Rev. X 9 011010 (2019).

2017

Realization of a Quantum Detector based on the Cooper Pair Box

L. Tosi, D. Vion and H. Le Sueur – arxiv:1711.08758– submitted to Phys Rev Applied

2016

Replicas of the Kondo peak due to electron-vibration interaction in molecular transport properties
P. Roura-Bas, L. Tosi, and A. A. Aligia
Phys. Rev. B 93, 115139 (2016).

2015

Coherent Manipulation of Andreev States in superconducting atomic contacts
C. Janvier, L. Tosi, L. Bretheau, C. Girit, M. Stern, P. Bertet, P. Joyez, D. Vion, D. Esteve, M. Goffman, H. Pothier and C. Urbina
Science 349, 1199 (2015).

 

Restoring the SU(4) Kondo regime in a double quantum dot system
L. Tosi, P. Roura-Bas and A. A. Aligia
J. Phys.: Condens. Matter 27 335601(2015).

2014

Multiple First Order Transitions in Cr Thin Films
R. H. Rodriguez, L. Tosi, M. Menghini, H. Pastoriza and C. A. Balseiro
J. Phys.: Conf. Ser. 568 042031 (2014).

 

Superconducting atomic contacts inductively coupled to a microwave resonator
C. Janvier, L. Tosi, C. Girit, M. Goffman, H. Pothier and C. Urbina
J. Phys.: Condens. Matter 26 474208 (2014).

2013

Orbital Kondo spectroscopy in a double quantum dot system
L. Tosi, P. Roura-Bas and A. A. Aligia
Phys. Rev. B 88 235427 (2013).

 

On the origin of the low temperatures resistivity minimum in Cr thin films
E. Osquiguil, L. Tosi, E. E. Kaul and C. A. Balseiro
J. Appl. Phys. 114, 243902 (2013).

 

Nonequilibrium transport through magnetic vibrating molecules
P. Roura-Bas, L. Tosi, and A. A. Aligia
Phys. Rev. B 87, 195136 (2013).

2012

Barkhausen-type noise in the resistance of antiferromagnetic Cr thin films
L. Tosi, E. Osquiguil, E. E. Kaul, C. A. Balseiro
Europhys. Lett. 100, 67005 (2012).

 

Thermopower of an SU(4) Kondo resonance under an SU(2) symmetry-breaking field
P. Roura-Bas, L. Tosi, A. A. Aligia and P. S. Cornaglia
Phys. Rev. B 86 165106 (2012).

 

Nonequilibrium conductance through a benzene molecule in the Kondo regime
L. Tosi, P. Roura-Bas and A. A. Aligia
J. Phys.: Condens. Matter 24 (2012) 365301.

 

Effects of spin density wave quantization on the electrical transport in epitaxial Cr thin films
E. Osquiguil, E. E. Kaul, L. Tosi and C. A. Balseiro
Phys. Rev. B 85, 104410 (2012).

 

Superconducting quantum point contacts
L. Bretheau, C. Girit, L. Tosi, M. Goffman, P. Joyez, H. Pothier, D. Esteve, C. Urbina
C. R. Physique 13 (2012) 89-100.

 

Transition between SU(4)-SU(2) Kondo effect
L. Tosi, P. Roura-Bas and A. A. Aligia
Physica B 407 (2012) 32593262.

 

Out of equilibrium Anderson model: Conductance and Kondo temperature
L. Tosi, P. Roura-Bas, A. M. Llois and A. A. Aligia
Physica B 407 (2012) 32633266.

2011

Interplay between quantum interference and Kondo effects in nonequilibrium transport through nanoscopic systems
Pablo Roura-Bas, L. Tosi, A. A. Aligia and K. Hallberg
Phys. Rev. B 84, 073406 (2011).

 

Effects of vertex corrections on diagrammatic approximations applied to the study of transport through a quantum dot
L. Tosi, Pablo Roura-Bas, Ana M. Llois and Luis O. Manuel
Phys. Rev. B 83, 073301 (2011).

 

Spin selective transport through Aharonov-Bohm and Aharonov-Casher triple quantum dot systems
L. Tosi and A. A. Aligia
Physica Status Solidi B 248 732 (2011).

 

Exchange Activities

2018-October; Autonomus University Madrid, Spain: To reinforce the collaboration with collegues Alfredo Levi Yeyaty and Sunghun Park and work on the writing of an article in common.

2018-August; Optical Properties Laboratory, Centro Atómico Bariloche, CNEA, Argentine: To work on the theory of a experiment on “Andreev Bound States in InAs Nanowires”. 1 month stay. Researchers in charge: Andres Reynoso, Axel Bruchhausen and Alex Feinstein.

2017-Oct-November: Visitor at Michel Devoret’s Lab in Yale, New Heaven to collaborate on project about Andreev State spectroscopy in semiconductor nanowires. Visitor at Will Oliver’s Group and Pablo Jarillo Herrero both in MIT, Boston and at Jason Petta’s Group in Princeton University.

2012-Sept; 2013-Sept; 2014-Sept: Quantronics Group, SPEC, CEA-Saclay, France: In the context of binational collaboration Project ECOS “Etats liés d’Andreev et de Majorana dans les circuits hybrides supraconducteurs” between Argentina-France. Researchers in charge: Cristian Urbina, Hugues Pothier and Marcelo Goffman.

2011-Jan-March: Quantronics Group, SPEC, CEA-Saclay, France: Three months internship on the physics of Andreev Bound States in atomic contacts. Under the supervision of Cristian Urbina.

2010-Mar-Jul: Invited Exchange in the Condensed Matter Group, Physics Dept. at Centro Atómico Constituyentes, Buenos Aires, Argentina: Development of skills in the use of the numerical calculation technique Non-crossing approximation with Pablo Roura Bas.

2010-Feb: Working Experience Stage-in-Service Training at Low Temperatures Laboratory, Centro Atómico Bariloche, Bariloche, Argentina. Experimental work and development of skills in the use of magnetic decoration technique for the imaging of vortices in superconducting materials. Advisor: Yanina Fasano.

 

Invited Talks/Posters

2019 talk Spin-orbit splitting of Andreev States revealed by microwave spectroscopy, APS March Meeting, Boston, USA.

2018 poster

Spin-orbit splitting of Andreev States revealed by microwave spectroscopy, PIRE Conference, Pittsburgh, USA.

2018 poster

Spin-orbit in InAs nanowires revealed by Andreev State Spectroscopy. Quantum Designer Conference, San Sebastian, Spain.

2018 talk

Dynamic of Quasiparticles in Andreev States. Spring Meeting of German Physics Society. Berlin

2017 talk

Dynamic of Quasiparticles in Andreev States. GDR Meeting, Aussois, France.

2017 talk

Dynamic of Quasiparticles in Andreev States, Beyond Majorana Fermions Conference in New Heaven, USA

2017 talk

Are odd parity states in an Andreev Quantum Dot always a nuisance?, Majorana States in Condensed Matter: Towards Topological Quantum Computation, May 2017, Mallorca, Spain

2016 poster

Quasiparticle Dynamics in a hybrid Cooper Pair Box, GDR Physique Quantique Mesoscopique – Dec 2016, Aussois, France.

2016 talk

Quasiparticle Dynamics in a hybrid Cooper Pair Box, Frontiers in Physical Science– Dec 2016, Buenos Aires, Argentina.

2015 talk

Towards quantum transport experiments in Bariloche, XV Workshop on Surfaces and Nanostructured Materials NANO 2015, Rosario, Argentina.

2014 poster

Multiple first order transitions in Cr thin films, 27th International Conference on Low Temperature Physics (LT27) 6-13 August 2014, Buenos Aires, Argentina.

2011 poster

Non equilibrium transport of the 2-level Anderson Model, Pablo Roura-Bas, L. Tosi and A. A. Aligia. Autumn College on Non-Equilibrium Quantum Systems, 2-13 May 2011, Departamento de Fisica, FCEyN, Buenos Aires, Argentina.

poster

Vertex Corrections’ effects on diagrammatic approximations applied to the study of transport through a quantum dot. XII Giambiagi School, Departamento de Fisica FCEyN Universidad de Buenos Aires, Buenos Aires, Argentina.

2010 poster

Transition between SU(4)-SU(2) Kondo effect. Frontiers of Condensed Matter V, Dpto. Materia Condensada Laboratorio Tandar, Centro Atómico Constituyentes, Capital Federal, Argentina.

poster

1/2-spin Anderson model out of equilibrium: conductance and Kondo temperature, Frontiers of Condensed Matter V, Dpto. Materia Condensada Laboratorio Tandar, Centro Atómico Constituyentes, Capital Federal, Argentina.

 

Teaching Activity

Lecturer

2018

School on quantum materials and workshop on vortex behavior in unconventional superconductors - Braga (Portugal) – 7-12 October, 2018.

2018

Lectures on Mesoscopic Superconductivity- Bariloche (Argentine) – August 2018.

Tutor in Physics at ESPCI (École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris):

2018

Mars-June: Solid State Physics.

2017

Mars-June: Solid State Physics.

Teaching Assistant at Instituto Balseiro, Bariloche:

2015

June-July: Introduction to Quantum Mechanics and Solid State Physics.

2014

August-December:Experimental Physics I.

 

Feb-July:Phenomenology in Condensed Matter II: Transport and Superconductivity.

2013

August-December:Statistical Mechanics.

 

October:Transport in nanostructures, and Devices, J. A. Balseiro School “Electrons, light and sound in nanostructures: from concepts to devices”.

 

Feb-JulyElectromagnetism.

2012

August-December:Statistical Mechanics.

 

Feb-JulyElectromagnetism.

2011

October: Electrons and Phonons, Growing and Characterization of thin films, Semi-classic transport theory, J. A. Balseiro School ”Experimental Techniques in Condensed Matter”.

 

August-December:Statistical Mechanics.

2010

August-December:Statistical Mechanics.

Other:

2006

Highschool Substitute Teacher of General Physics. Colegio del Sol (Tucumán, Argentina).

2005

Highschool Teacher of General Physics in Special Course for Advanced Students. Colegio del Sol & Colegio Pablo Apóstol (Tucumán, Argentina).

2004

Highschool Teaching Assistant of General Physics. Colegio del Sol (Tucumán, Argentina).

 

Dissemination Activities

2018 Participation of the Workshop "Atelier des Bourses Individuelles" organised by Université Paris-Saclay.

2017

Participation of Fête de la Science at Optics Institute, France

2016

Participation in Fête de la Science at Orsay University, France

2014

Seminar on “Physics at Low Temperatures” destined to a wide audience at Centro Atómico Bariloche Exposition, Bariloche, Argentina.

2013

Seminar “Transport through nanoscopic systems” given to high-school students in Viedma, Río Negro, Argentina in the context of the program “Nanotechnologists for one day 2013” organized by the Fundación Nacional de Nanotecnología and the National Education Ministry.

 

Seminar on “Physics at Low Temperatures” destined to a wide audience given at Espacio Explora from Fundación Solydeus in the 39th Book International Fair, Capital Federal, Argentina.

 

Seminar on “Physics at Low Temperatures” destined to a wide audience at Centro Atómico Bariloche Exposition, Bariloche, Argentina.

2012

Seminar on “Physics at Low Temperatures” destined to a wide audience at Centro Atómico Bariloche Exposition, Bariloche, Argentina.

2011

Seminar on “Physics at Low Temperatures” destined to a wide audience given at Espacio Explora from Fundación Solydeus in the 37th Book International Fair, Capital Federal, Argentina.

2010

Seminar on “Transport through nanoscopic systems” given to high-school students at Colegio Pablo Apóstol (Yerba Buena) and Colegio del Sol (S.M.de Tucumán), Tucumán, Argentina.

 

Seminar on “Physics at Low Temperatures” destined to a wide audience given at Espacio Explora from Fundación Solydeus in the 36th Book International Fair, Capital Federal, Argentina.

 

Other Activities

Highschool Teachers Formation on Experimental Physics: Organization of the Formation Course: “Electricity – Electrical Circuits” (Theoretical-Experimental). Made in collaboration with the Mathematics, Astronomy and Physics Dept. from Cordoba National University, Argentine. Course given at Col. Pablo Apostol (Tucuman, Argentina). 2006.

State Physics Olympiads:Creation of the organization: OPF (Olimpiadas Provinciales de Física), responsible for the realization of State Physics Olympiads, for the formation of teachers in experimental physics aspects and on the motivation of high-school students towards the study of Physics and Science. 2005-2006.

Ist Exposition of Distinguished Educational Productions:Invited Speaker as recognition of the participation in Phys. Olympiads during 2004. Tucuman, April, 2005.

National Physics Olympiads:Participation in National Phys. Olympiads for five consecutive years (2000-2004). Highlights: 3rd place (2002 and 2004) & Honorific Mention (2003).

 

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