. Department of Physics The Ohio State University

Home Research C.V. (PDF) Links

.

.

.

Iulian Hetel Department of Physics, The Ohio State University 1040 Physics Research Building 191 West Woodruff Avenue Columbus, OH 43210-1117, USA E-mail: ihetel@mps.ohio-state.edu Phone: (614) 292-7800 Fax: (614) 292-7557 Research Interests Experimental Condensed Matter Physics strongly correlated electrons systems high-Tc superconductivity proximity effects in superconductor-ferromagnet heterostructures Education Ph.D. Physics, The Ohio State University, Columbus, Ohio, USA       Thesis: Quantum Superconductor-to-Nonsuperconductor Transition in 2D Films       Adviser: Thomas R. Lemberger Fall 2007 M.S. Physics, Universite de Sherbrooke, Sherbrooke, Quebec, Canada       Thesis: Coexistence of Magnetism and Superconductivity in Electron-Doped Superconductors       Advisers: Patrick Fournier and Mario Poirier August 2002 Maitrise de Physique et Applications (B.S.), Universite Joseph Fourier, Grenoble, France       Thesis: Characterization of superconductors under pressure by AC susceptibility measurements       Adviser: Manuel Nunez-Regueiro (CRTBT- CNRS) July 2000 Awards and Honors Presidential Fellowship, Graduate School, The Ohio State University (the highest recognition for outstanding accomplishments and potential of students in graduate programs) 2006-2007 Young Investigator Award, The International Conference on Strongly Correlated Electron Systems (SCES07) Spring 2007 I2CAM Junior Travel Award, Institute for Complex Adaptive Matter Winter 2007 Grant-in-Aid of Research, Ohio Chapter of Sigma Xi (The Scientific Research Society) Winter 2007 Ray Travel Award for Scholarship and Service, The Ohio State University Fall 2006 Alumni Grant for Graduate Research and Scholarship, The Ohio State University Spring 2006 Agence Universitaire de la Francophonie Fellowship (five fellowships in physics awarded to applicants from French-speaking countries worldwide) 1999-2000 Publications I. Hetel, T.R. Lemberger, and M. Randeria, Quantum Critical Behaviour in the Superfluid Density of Strongly Underdoped Ultrathin Cuprate Films, accepted for publication, Nature Physics (2007). T.R. Lemberger, I. Hetel, Jacob W. Knepper, and F.Y. Yang, Penetration depth study of very thin superconducting Nb films, accepted for publication, Phys. Rev. B (2007). I. Hetel, T.R. Lemberger, A. Tsukada, and M. Naito, Doping-dependent Superfluid Density in La2-xSrxCuO4 Thin films, in preparation (2007). Y. L. Zuev, I. Hetel, T.R. Lemberger, Search for Cooper-pair Fluctuations in Severely Underdoped YBCO Films, Phys. Rev. B 74, 012502 (2006). R. Prozorov, D. D. Lawrie, I. Hetel, P. Fournier, and R. W. Giannetta, Field-dependent Diamagnetic Transition in Magnetic Superconductor Sm1.85Ce0.15CuO4-d, Phys. Rev. Lett. 93, 147001 (2004). P. Richard, G. Riou, I. Hetel, S. Jandl, M. Poirier and P. Fournier, Role of Oxygen Nonstoichiometry and the Reduction Process on the Local Structure of Nd2-xCexCuO4-d, Phys. Rev. B 70, 064513 (2004). P. Fournier, M.-E. Gosselin, S. Savard, I. Hetel, P. Richard and G. Riou, Fourfold Oscillations and Irreversibility of the Magnetoresistance in the Nonmetallic Regime of Electron-doped Cuprates, Phys. Rev. B 69, 220501(R) (2004). Presentations Superfluid Density Measurements in Underdoped 2D Y1-xCaxBa2Cu3O7-d Films, The International Conference on Strongly Correlated Electron Systems (SCES07), Houston, USA (May 13-18, 2007, poster). Superfluid Density Measurements in Underdoped 2D Y1-xCaxBa2Cu3O7-d Films, The I2CAM//FAPERJ/CIAR Spring School on New Phenomena in Highly Correlated Quantum Matter, Rio de Janeiro, Brazil (March 11-18, 2007, poster). Quantum Superconductor-to-insulator Transition in 2D Y1-xCaxBa2Cu3O7-d Films, American Physical Society March Meeting, Denver, USA (March 5-9, 2007). Low Temperature Antiferromagnetic Order in Sm1.85Ce0.15CuO4-d , The Edward F. Hayes Graduate Research Forum, Columbus, USA (April 2003). Magnetism and Superconductivity in Sm1.85Ce0.15CuO4-d , M.S. defense/Physics Colloquium, Universite de Sherbrooke, Sherbrooke, Canada (July 31, 2001). Magnetism and Superconductivity in Sm1.85Ce0.15CuO4-d , Canadian Institute for Advanced Research (CIAR) Superconductivity Meeting, Toronto, Canada (May 4-6, 2002, poster). Experimental Study of Electron-doped High Temperature Superconductors,S Intelligent Materials and Systems Institute (IMSI) Colloquium, Sherbrooke, Canada (October 25, 2001). Research Experience Research Associate Lemberger Group, Department of Physics, The Ohio State University, Columbus, USA grew epitaxial oxide thin films (cuprates, molybdates, manganites) using pulsed laser deposition (PLD) on atomically flat substrates characterized films with atomic force microscopy (AFM) and scanning electron microscopy (SEM) measured the temperature dependence of superfluid density in La2-ySryCuO4 films, y=0.06-0.30, and in severely underdoped ultrathin Y1-xCaxBa2Cu3O7-d films observed linear scaling of TC with nS(0) in ultrathin films as a result of quantum fluctuations near a 2D quantum critical point 2002-present Laboratory Supervisor Assistant to the Laboratory Supervisor Materials Preparation Facilities, The Ohio State University, Columbus, USA trained, certified, and assisted faculty and students with metal thermal evaporation, ion-milling, wet etching, e-beam lithography, photolithography, AFM, SEM, and SQUID magnetometry involved in projects including micro- and nano-fabrication, thin film multilayer deposition, magnetic storage, DNA imaging, diamond detectors, optical lattices, free-standing metal films 2006-2007 2004-2006 Research Associate Centre de recherche sur les proprietes electroniques des materiaux avances, Universite de Sherbrooke, Sherbrooke, Quebec, Canada determined the annealing conditions for oxygenation and oxygen reduction in electron-doped superconductors characterized samples using X-ray diffraction, microwave conductivity, ultrasonic interferometry, low-temperature electronic and heat transport measurements discovered new signatures of antiferromagnetic order coexisting with the superconducting state in resistivity and ultrasonic velocity measurements in Sm1.85Ce0.15CuO4-d 2000-2002 Intern Centre de Recherches sur les Tres Basses Temperatures, Grenoble, France designed and constructed a new experiment to measure magnetic susceptibility at pressures up to 25 GPa January-April 2000 Academic Service Graduate Student Representative, University Research Committee, Council on Research and Graduate Studies, The Ohio State University Fall 2006-present Elected Delegate, Council of Graduate Students, The Ohio State University Fall 2006-present Graduate Student Representative, Graduate Studies Committee, Department of Physics, The Ohio State University 2004-2006 References Dr. Thomas R. Lemberger (Ph.D. adviser) Department of Physics The Ohio State University 1040 Physics Research Building 191 West Woodruff Avenue Columbus, OH 43210-1117, USA E-mail: trl@mps.ohio-state.edu Phone: (614) 292-7799 Fax: (614) 292-7557 Dr. Mohit Randeria Department of Physics The Ohio State University 1040 Physics Research Building 191 West Woodruff Avenue Columbus, OH 43210-1117, USA E-mail: randeria@mps.ohio-state.edu Phone: (614) 292-2457 Fax: (614) 292-7557 Dr. Patrick Fournier (M.S. adviser) Departement de Physique Universite de Sherbrooke Sherbrooke, Quebec J1K2R1, Canada E-mail: patrick.fournier@usherbrooke.ca Phone: (819) 821-8000, ext. 62822 Fax: (891) 821-8046 Dr. Mario Poirier (M.S. adviser) Departement de Physique Universite de Sherbrooke Sherbrooke, Quebec J1K2R1, Canada E-mail: mario.poirier@usherbrooke.ca Phone: (819) 821-8000, ext. 62048 Fax: (891) 821-8046

This web page was last updated on August 15, 2007.
Copyright 2007 Iulian Hetel