Author Archives: beatriz.martin

Anisotropic photoemission time delays close to a Fano resonance

An article published in Nature Communications (see Nat. Comm. 2018, 9, 955, DOI: 10.1038/s41467-018-03009-1) has identified the role of autoionizing resonances in photoemission time delays, a clear manifestation of electron correlation effects on photoionization processes. The work results from an international cooperation among researchers led by U. Keller (ETH-Zurich), F. Martín (Universidad Autonoma de Madrid, IFIMAC Condensed Matter Center and IMDEA-Nanoscience), and A. L’Hullier (Lund University).

Electron correlation and multielectron effects are fundamental interactions that govern many physical and chemical processes in atomic, molecular and solid state systems. The process of autoionization, induced by resonant excitation of electrons into discrete states present in the continuum spectrum of atomic and molecular targets, is mediated by electron correlation. The paper investigates the attosecond photoemission dynamics in argon in the 20–40 eV spectral range, in the vicinity of the 3s−1np autoionizing resonances. Measurements of the differential photoionization cross section are reported, from which energy and angle-dependent atomic time delays are extracted with an attosecond interferometric method. With the support of a theoretical model, a large part of the measured time delay anisotropy is attributed to the presence of autoionizing resonances, which not only distort the phase of the emitted photoelectron wave packet but also introduce an angular dependence.

Anisotropic photoemission time delays close to a Fano resonanceFigure: Anisotropic photoemission time delays close to a Fano resonance.
Angular-resolved time delays. (a) and (b) show the measured atomic time delay as a function of electron emission angle in the absence and the presence of an autoionizing state, respectively (red and blue symbols). The delays are referenced to the value retrieved for electrons departing within an opening angle of up to 30 degrees. The green lines show the calculated delays in resonant (solid) and nonresonant (dashed) conditions. The error bars indicate the standard deviation as extracted by a series of independent measurements.
Source: Nat. Comm. 2018, 9, 955, DOI: 10.1038/s41467-018-03009-1

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First direct images of the square of the wave function of the hydrogen molecule

An article published in Nature Communications (see Nat. Comm. 2017, 8, 2266, DOI: 10.1038/s41467-017-02437-9), led by R. Dörner (Goethe-Universität Frankfurt am Main) and F. Martín (Universidad Autonoma de Madrid) reports on the first visualization on the square of the wave function of the hydrogen molecule.

Upon publication, media appearances have been found at Phys.org, ChemistryWorld, EuropaPress, LongRoom.

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XCHEM project in an outreach programme

Fernando Martin has explained the findings derived from the XCHEM project funded by the European Research Council in the outreach science program #ConCiencia, “A matter of time”: http://www.telemadrid.es/…/conciencia-una-cuestion-de-tiempo

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Imaging the square of the correlated two-electron wave function of a hydrogen molecule

The toolbox for imaging molecules is well-equipped today. Some techniques visualize the geometrical structure, others the electron density or electron orbitals. Molecules are manybody systems for which the correlation between the constituents is decisive and the spatial and the momentum distribution of one electron depends on those of the other electrons and the nuclei. Such correlations have escaped direct observation by imaging techniques so far.
Here, we implement an imaging scheme which visualizes correlations between electrons by coincident detection of the reaction fragments after high energy photofragmentation. With this technique, we examine the H2 two-electron wave function in which electron–electron correlation beyond the mean-field level is prominent. We visualize the dependence of the wave function on the internuclear distance. High energy photoelectrons are shown to be a powerful tool for molecular imaging. Our study paves the way for future time resolved correlation imaging at FELs and laser based X-ray sources.

Read the full article in NATURE COMMUNICATIONS
https://www.nature.com/articles/s41467-017-02437-9
DOI: 10.1038/s41467-017-02437-9

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Pre-doctoral position on modelling of attosecond time scale processes

A two-year pre-doctoral position is available under the supervision of Dr. Alicia Palacios at CampuS group (Universidad Autónoma de Madrid). The position is co-funded by the ESF[i] under the 2017 call for the recruitment of pre-doctoral researchers of the Madrid region (more details here).

The successful applicant shall develop an open project that aims to study ionization processes in molecules, as well as in other complex systems, or its environment. The researcher will learn to use the appropriate computational tools for the description of these processes and to interpret the results, with the aim of giving explanations to experiments currently carried out in huge scientific infrastructures.

CampuS theoretical group is focused on the study of the dynamics in isolated quantum systems (from the smallest to medium-sized systems, or extended ones) and the development of state-of-the-art theoretical tools that can help us to understand their properties and predict their behavior.

We seek for a pre-doctoral researcher with a good background in Quantum Physics, Atomic and Molecular Physics, programming skills and commitment to teamwork, who wish to start a thesis project in any of the group research lines (laser-matter interaction, surfaces or clusters). Candidates should also comply with the set of restrictions imposed by the funders (see below).

Start date: By March 1st, 2018.

Remuneration: Gross annual salary (before applying national income taxes and social security contributions) amounts to roughly 18.800 €. Researchers may receive additional funding to support the expenses derived from research missions and the attendance to conferences.

Eligibility criteria: According to the specific call restrictions, applicants must:

  • hold a Bachelor in Physics, Chemistry or related areas (for degrees obtained in a foreign university, homologation is required). Any postgraduate or specialization studies will also be taken into consideration.
  • be registered in the National Youth Guarantee system or be in a position to be a beneficiary of the system (be a national of the EU, EEA or Switzerland or meet the conditions to work in Spain, have less than 30 years and be unemployed). For more information, please, check: http://www.empleo.gob.es/es/garantiajuvenil/accesoJovenes.html).
  • be registered in any locality within the Madrid Community from July 10, 2017.

Application procedure: Applicants should send, before February 8, 2018:

  • a motivation letter,
  • a detailed CV and contact information of two referees,
  • a copy of the Bachelor degree (and, where applicable, homologation credential), and other courses taken, and a certificate on the marks obtained,
  • a proof of all the eligibility requirements described above (for the National Youth Guarantee system, the applicant should be in a position to beneficiary of the said system at the time of recruitment).

Please, send all the documents in a single pdf file named as the candidate (e.g. SURNAME_NAME.pdf) to beatriz..

Upon evaluation of the applications received, selected candidates shall be contacted for an interview. Recommendation letters could be requested to referees during the selection process.

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[i] This call is co-financed by the European Social Fund through the Youth Employment Operational Program for the 2014-2020 programming period, as well as the Youth Employment Initiative (YEI).

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King Jaime I Award ceremony – media appearances

DIGITAL MEDIA

PRESS RELEASES

  • El Periódico Mediterráneo Vila-Real. 28/10/2017: Los Jaume I del 2017 critican la falta de interés por la Ciencia en España
  • Levante EMV, 28/10/2017: Felipe VI renuncia a presidir los Premios Jaime I por la crisis catalana
  • Levante de Castelló EMV, 28/10/2017: El talento no tiene género
  • Levante EMV, 28/10/2017: El talento no tiene género
  • El Periódico Mediterráneo, 28/10/2017: Los Jaume I del 2017 critican la falta de interés por la Ciencia en España
  • El Mundo Castellón, 28/10/2017: Los Premios Rey Jaime I o cómo luchar contra los males de España
  • Las Provincias Alicante, 28/10/2017: Los Jaime I alertan de la pérdida de una generación de investigadores por la crisis
  • Las Provincias, 28/10/2017: Los Jaime I alertan de la pérdida de una generación de investigadores por la crisis
  • El Mundo Valencia, 28/10/2017: Los Premios Rey Jaime I o cómo luchar contra los males de España
  • El Mundo Alicante, 28/10/2017: Los Premios Rey Jaime I o cómo luchar contra los males de España
  • Huelva Información, 31/10/2017: La Reina entrega los Premios Rey Jaime I 2017
  • La Gaceta Regional de Salamanca, 31/10/2017

  • Diario de Menorca, 31/10/2017

  • ABC Andalucía, 31/10/2017: Convivir con los mejores valores
  • La Provincia, Diario de las Palmas, 31/10/2017: Doña Letizia valora la fuerza de la innovación en los Premios Rey Jaime I
  • El Día de Córdoba, 31/10/2017: La Reina entrega los Premios Rey Jaime I 2017
  • El Progreso, 31/10/2017: La entrega de los Jaime I sirve para resaltar los valores de ciencia y convivencia
  • El Mundo Alicante, 31/10/217: La financiación de la ciencia: insuficiente y mal repartida
  • La Opinión de Tenerife, 31/10/2017: Doña Letizia entrega los Premios Rey Jaime I 2017 en la Lonja de Valencia
  • Diario de Avisos, 31/10/2017: La reina Letizia preside en Valencia la ceremonia de los Premios Jaime I.
    Los galardonados subrayan la necesidad de apoyar la ciencia y la tecnología que se hace en España.
  • Diario de Burgos. 31/10/2017: Respaldo de la Reina Letizia a la investigación.
  • Málaga Hoy, 31/10/2017: La Reina entrega los Premios Rey Jaime I 2017
  • El Día de Tenerife, 31/10/2017: Premios que destacan los valores científicos
  • Granada Hoy, 31/10/2017: La Reina entrega los Premios Rey Jaime I 2017
  • Diario de Jerez, 31/10/2017: La Reina entrega los Premios Rey Jaime I 2017
  • Diario de Teruel, 31/10/2017: Los Premios Jaime I destacan los valores de la ciencia y la convivencia social
  • Diario de Pontevedra, 31/10/2017: La entrega de los Jaime I sirve para resaltar los valores de ciencia y convivencia.
  • Europa Sur, 31/10/2017: La Reina entrega los Premios Rey Jaime I 2017
  • Información Alicante, 31/10/2017: Ciencia y valores contra los fanatismos
  • Las Provincias, 31/10/2017: Los Jaime I piden más inversión en ciencia
  • Diario de Sevilla, 31/10/2017: La Reina entrega los Premios Rey Jaime I 2017
  • Canarias 7, 31/10/2017: La reina entrega en Valencia los Premios Jaime I.
    El galardón reconoce el trabajo de investigadores y emprendedores
  • El Economista, 31/10/2017: La Reina: “España es tierra de ciudadanos dispuestos a mejorar y a convivir”.
    Los galardonador puden más recursos para investigación y asignarlos con criterios de efectividad.

MULTIMEDIA

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PhD positions funded by La Caixa


CampuS theoretical group offers mentorship in four different research topics to international students who wish to develop a research project,  oriented to obtain a PhD diploma, at the Condensed Matter Physics Center (IFIMAC-UAM) and at IMDEA-Nanoscience (Fundación IMDEA-Nanociencia).

 

The PhD positions are funded by the doctoral fellowship programme INPhINIT, which is devoted to attract international Early-Stage Researchers (ESR) to top Spanish excellent research centres. INPhINIT is promoted by the “la Caixa” Foundation and relies on the European Commission’s support through the Horizon 2020 Marie Skłodowska-Curie Actions – COFUND programme.

The fellowship shall cover a 3-year doctoral employment contract, a top up contribution for other training expenses, and complementary training on transversal skills. In addition, phd candidates may opt to a price amounting to 7.500 € if they got the diploma earlier than 6 months after the finalization of the contract.

For more information on the fellowship programme, please visit: www.inphinitlacaixa.org. Deadline for application is February 1st, 2018.

For more information on the research topics, check the documents below:

  • Theoretical Attosecond Electron Dynamics: from biomolecules to solids (IMDEA-Nanociencia) – Description
  • Ultrafast molecular dynamics induced by attosecond pulses (IFIMAC-UAM) – Description
  • Chemical-physics properties of new 2D materials (IMDEA-Nanociencia) – Description
  • Graphene-based materials: Exploring new physical properties based on theoretical simulations (IFIMAC-UAM) – Description

In case you are interested in this fellowship, you should check the fullfillment of the excellence criteria and other specific call requirements (research experience, training, language and mobility requirements) here.

Students with spanish nationality not fullfilling the mobility requirements can apply to a fellowship to carry out a doctorate at a Spanish University. The deadline to apply is February 27, 2018. Mor information here.

For any question on the research projects or if you became selected for the face-to-face evaluation stage, please, do not doubt to contact the group projects manager beatriz..

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Professor Fernando Martín receives the King Jaime I Award for Basic Research

Fernando Martín, Professor of the Department of Chemistry of the Faculty of Sciences of the UAM, received on October 30 the King Jaime I Prize for Basic Research in a ceremony held in Valencia, in the Hall of Columns of the Lonja of Merchants.

The event was chaired by His Majesty Queen Letizia and was attended by the President of the Generalitat Valenciana, the Mayor of Valencia and the President of the Valencian Foundation for Advanced Studies. The ceremony was attended on behalf of the UAM by its Rector, Rafael Garesse, the dean of the Faculty of Sciences, José Mª Carrascosa, the Director of the Department of Chemistry, Otilia Mó, and Professor Manuel Yáñez who was the Director of the Doctoral thesis by Fernando Martín.

The jury, chaired by Roger Kornberg, Nobel Prize in Chemistry 2006, recognized the merits of Fernando Martín in “the foundation of the field of theoretical attochemistry, which makes it possible to calculate the movement of electrons and, therefore, the prediction of chemical reactions”. This discipline, consolidated during the last years, has opened the way to a new chemistry in which the obtaining of new compounds would be possible from reactions that do not follow the conventional patterns. The research of Professor Fernando Martín has a strong multidisciplinary character, which has led him to relevant discoveries in various areas: lasers physics, physical chemistry, quantum chemistry, atomic and molecular physics, surface physics, computational modelling, organic and inorganic chemistry , physics of accelerators and biophysics.

With more than 400 international publications, Professor Fernando Martín has been invited as a lecturer in the main forums of his research area, and has attracted important funding from the European Union, among others, an ERC Advanced Grant project. This award is added to others previously obtained as the King Juan Carlos I Research Prize (2001), or the Spanish Society of Chemistry in Physical Chemistry Prize (2010).

For more information:

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Postdoc position – XCHEM code


16/10/2017 – A 1,5 years postdoc position is available in the group of Prof. Fernando Martin. The position shall be co-financed by the H2020 program of the European Union (ERC-2017 PoC-GA 780284).

The successful applicant shall work in the improvement and optimizaton of XCHEM code (https://www.xchem.uam.es/xchem/).

The CAMPUS  group at the Chemistry Department of the Universidad Autónoma de Madrid is focused on the theoretical study of the dynamics in isolated quantum systems (from the smallest to medium-sized systems, or extended ones) and the development of state-of-the-art theoretical tools which can help us to understand their properties and predict their behavior.

We seek for a post-doctoral researcher with a strong background in atomic, molecular, optical physics and attosecond physics.

Starting date: Expected start date is November, 2017.

Remuneration: Gross annual salary (before applying national income taxes and social security contributions) amounts to roughly 2.344 €/month.

Eligibility criteria: Applicants must:

  • Hold a PhD in Theoretical/Computational Physics, Computational Chemistry or Informatics.
  • Have experience and knowledge on atomic, molecular and optical physics and attosecond physics. Publications and/or presentations to relevant congresses in the area will be positively evaluated.
  • Have good knowledge of English

Selection Criteria: The selection will be made on the basis of demonstrated knowledge in the following fields:

  1. Computational physics/chemistry methodologies and techniques,
  2. Theoretical atomic and molecular physics / Quantum Chemistry,
  3. Programming skills and code development (Fortran, C/C++, python, scripting languages, Linux/Unix, etc),
  4. Knowledge on parallelization and optimization of codes (MPI, openMP, etc),
  5. Handling of codes which are commonly used in the area of interest,
  6. Previous experience in any of the areas of interest.

Application procedure: Applicants should send their Curriculum Vitae, letter of motivation, and information on two referees before October 26, 2017 to the address beatriz..

Reference letters may be requested during the evaluation process. Selected candidates will be invited to a personal interview.

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[1] This call is financed by the H2020 program of the European Union (ERC-2017 PoC-GA 780284)

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Job opportunities at CampuS theoretical group

CampuS theoretical group, led by Prof. Fernando Martín, belongs to the Department of Chemistry of the Universidad Autónoma de Madrid. Its research mainly focuses on (i) the theoretical and computational modeling of photoexcitation and photoionization processes in atomic and molecular systems induced by synchrotron radiation and ultrashort laser pulses with femto- and attosecond duration, and (ii) the study and theoretical prediction of properties of materials and nano-objects of complex molecular systems, aggregates and fullerenes, isolated or deposited on metallic and nonmetallic surfaces. This, in close collaboration with prestigious Spanish and international experimental groups.

The quality of the group is reflected by the number and quality of publications in the last ten years: more than 200 papers, among which 3 in Science, 2 in Nature, 1 Chemical Reviews, 1 in Nature Physics, 2 in Nature Chemistry, 1 in Nature Photonics, 2 in Nature Communications, 4 in Proc. of National Academy of Sciences, 1 in NanoLetters, 1 in ACS Nano, 2 in Angewandte Chemie, etc. In 2000, Fernando Martín was awarded the National Research Prize Rey Juan Carlos I, in 2010, the prize of the Spanish Royal Society of Chemistry in Chemical Physics, in 2011, the Advanced Grant from the European Research Council XCHEM, and in 2017 the King Jaime I Prize in Basic Research.

CampuS research group (https://campusys.qui.uam.es/) at the Universidad Autonoma de Madrid is continuously seeking for excellent researchers at predoctoral and postdoctoral level. If you have a mature interest in any of the research topics described above, we invite you to send us an expression of interest including your CV and motivation letter, briefly describing your research profile and the research project you would like to develop in our group.

If your profile fits our group, we will look for a convenient funding source and provide assistance with any administrative issue. Besides the group funding sources, different programs at National and European level may allow excellent researchers to develop a career path in the group, as summarized in the document developed by FECYT “Researcher career path in Spain at a glance”.

For any question you may have do not doubt to contact beatriz..

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