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DEPARTMENT OF PHYSICS

Buyukcekmece, Istanbul, TURKEY 34500

TÜRKÇE

 

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PUBLICATIONS

Recent Scientific Publications (after 01.01.2006)

(The Publications appear in SCI & SCI Exp. are shown with * )

  • * S. Caliskan and M.Kumru, "The effect of magnetic field on a nonballistic spin field effect transistor", J. Phys.: Condens. Matter , Vol. 19, Feb. 2007, pp. 076205
  • * S. Caliskan, "Conductance modulation of a nonballistic Datta-Das spin field effect transistor", J. Phys.: Condens. Matter , Vol. 18, Nov. 2006, pp. 10313–10318
  • * A. Tavman, Naz M. Agh-Atabay , S. Güner, F. Gucin and B. Dulger, "Investigation of Raman, FT-IR, EPR spectra and antimicrobial activity of 2-(5-H/Me/Cl-1H-benzimidazol-2-yl)-phenol ligands and their Fe(NO3)3 complexes", Transition Metal Chemistry,accepted, Sep. 2006
  • * S. Güner, O. Yalçın, S. Kazan, F. Yıldız, R. Şahingöz, "FMR Studies of bilayer Co90Fe10/Ni81Fe19, Ni81Fe19/ Co90Fe10 and monolayer Ni81Fe19 Thin Films", Physica Status Solidi A, Vol. 203, No. 7, Jun. 2006, pp. 1539-1544
  • * B. Birsöz, A. baykal, M. toprak, Y. Köseoğlu, "Synthesis, Characterization and Magnetic Investigation of (NH4)0.5Mn1.25(H2O)2[BP2O8]0.5H2O", Central European Journal of Chemistry, Vol. 5, No. 2, Apr. 2007
  • * Nermin Kasapoğlu, Bahar Birsöz, Abdülhadi baykal, Yüksel Köseoğlu, Muhammet S. Toprak, "Synthesis and Magnetic Properties of octahedral ferrite NixCo1-xFe2O4 Nanocrystals", Central european Journal of Chemistry, Vol. 5, No. 2, Apr. 2007
  • * Abdülhadi Baykal, Yüksel Köseoğlu, Mehmet Şenel, "Synthesis and magnetic characterization of Mn3O4 nanoparticles", Central European Journal of Chemistry, Vol. 5, No. 1, Mar. 2007, pp. 1-8
  • * Yüksel Köseoğlu and Hüseyin Kavas, "Size and Surface Effects on Magnetic Properties of Fe3O4 Nanoparticles", Journal of Nanoscience and Nanotechnology (accepted), Feb. 2007
  • * Y. Köseoğlu, H. Kavas and B. Aktaş, "Surface effects on magnetic properties of Fe3O4 nanoparticles", Physica Status Solidi (a), Vol. 203, No. 7, May. 2006, pp. 1595-1601
  • * S. Güner, M.K. Şener, H. Dinçer, Y. Köseoğlu, S. Kazan, M.B. Koçak, "EPR Studies on Cu2+ Complexes of Tetraaza Porphyrin derivatives", J. Magn. Magn. Mater. , Vol. 300, No. 1, Mar. 2006, pp. e530-e533
  • * Y. Köseoğlu , "Effect of Surfactant Coating on Magnetic Properties of Fe3O4 Nanoparticles: An FMR Study", J. Magn. Magn. Mater. , Vol. 300, No. 1, Mar. 2006, pp. e327-e330
  • * T. Bal demirci, Y. Köseoğlu, S. Güner and B. Ülküseven, "Vanadyl(IV) template complexes of bromo- and metoxy substituted N1,N4-diarylidene-S-methylisothiosemicarbazones", Central European J. Chem. , Vol. 4, No. 1, Feb. 2006, pp. 149-159
  • * S. Güner, O. Yalçın, S. Kazan, F. Yıldız, R. Şahingöz, "FMR Studies of bilayer Co90Fe10/Ni81Fe19, Ni81Fe19/ Co90Fe10 and monolayer Ni81Fe19 Thin Films", Physica Status Solidi A, Vol. 203, No. 7, Jun. 2006, pp. 1539-1544
  • * A. Kalkan, S.Güner, Z.A. Bayır, "Synthesis and EPR studies of metallophthalocyanines containing four carbhexyloxybiphenyloxy substituents", Dyes and Pigments, in press, May. 2006
  • * McCarthy M.C., Yu Z., Sari L., Schaefer H.F., Thaddeus P., "Monobridged Si2H4", Journal of Chemical Physics, Vol. 124, No. 4, Feb. 2006, pp. 074303
  • S. CALISKAN, E. P. NAKHMEDOV, E. SASIOGLU, "Effect of Electon-Electon Interactions on Density of States in Disordered Metallic Systems", Turkish Journal of Physics (in print)

Other Scientific Publications

(The Publications appear in SCI & SCI Exp. are shown with * )

  • * K. Golcuk, A. Altun, M. Kumru, M. Somer, "Vibrational and thermal studies of [MBr2(p-methylaniline)2] (M : Zn+2, Cd+2 and Hg+2) complexes", Vibrational Spectroscopy, Vol. 39, Jan. 2005, pp. 68-73
  • * K. Golcuk, A. Altun, S. Guner, M. Kumru and B. Aktas, "Thermal, Vibrational and ESR studies of Cu(II) bromide bis(p-methylaniline) and bis(m-methylaniline) complexes", Spectrochimica Acta Part A, Vol. 60, Jan. 2004, pp. 303-309
  • * A. Altun, K. Golcuk, M. Kumru, "Vibrational and thermal studies of metal(II) [Ni(II), Zn(II) and Cd(II)] iodide m-methylaniline complexes ", Vibrational Spectroscopy, Vol. 31, Dec. 2003, pp. 215-225
  • * A. Altun, K. Golcuk, M. Kumru, "Theoretical and experimental studies of the vibrational spectra of m-methylaniline", J. Mol. Struct. ( THEOCHEM ), Vol. 625, Nov. 2003, pp. 17-24
  • * K. Golcuk, A. Altun, M. Kumru, "Thermal studies and vibrational analyses of m-methylaniline complexes of Zn(II), Cd(II) and Hg (II) bromides", Spectrochimica Acta, Vol. 59A, Oct. 2003, pp. 1841-1847
  • * A. Altun, K. Golcuk, M. Kumru, A. F. Jalbout, "Electron-conformational study for the structure-hallucinogenic activity relationships of phenylalkylamines", Bioorganic & Medicinal Chemistry, No. 11, Sep. 2003, pp. 3861-3868
  • * A. Altun, K. Golcuk, M. Kumru, "Structure and vibrational spectra of p-methylaniline : Hartree-Fock, MP2 and density functional theory studies ", J. Mol. Struct. ( THEOCHEM ), Vol. 637, Aug. 2003, pp. 155-169
  • * K. Golcuk, A. Altun, M. Kumru, "Spectroscopic and thermal studies of Mn(II), Co(II) and Ni(II) bromide m-methylaniline complexes", Journal of Molecular Structure, Vol. 657, Jul. 2003, pp. 385-393
  • * A. Altun, K. Golcuk, M. Kumru , "Vibrational and thermal studies of p-methylaniline complexes with Ni(II), Zn(II) and Cd(II) iodides ", Vibrational Spectroscopy, Vol. 33, No. 1-2, Jun. 2003, pp. 63-74
  • * S. Çalışkan, E. Şaşıoğlu, M. Kumru, E. P. Nakhmedov, Ö. Çakıroğlu, B. Karaoğlu, "Mean Field Approach to the Correlation Effects on the Density of Electronic States and Conductivity of Disordered Metals", phys. stat. sol. (b) , Vol. 229, Jan. 2002, pp. 1205-1214
  • * E. P. Nakhmedov, M. Kumru, R. Oppermann, "Nakhmedov, Kumru, Oppermann Reply", Phys. Rev. Lett., Vol. 87, Jan. 2001, pp. 239704-1
  • * V. I. Dimitrov, A. Gungor and M. Kumru, "A Model of Self-Diffusion in Undercooled Liquids", Materials Science Forum, Vol. 360-362, Jan. 2001, pp. 113-118
  • * V. I. Dimitrov, A. Gungor and M. Kumru, "Free-Volume Diffusion in Undercooled Liquids", Materials Science Forum, Vol. 360-362, Jan. 2001, pp. 119-122
  • * V. I. Dimitrov, A. Gungor and M. Kumru, "A New Theory of Viscosity of Amorphous Metals", Bull. Russ. Acad. Sci. : Phys., Vol. 65, No. 10, Jan. 2001, pp. 1417-1419
  • K.Golcuk, M. Kumru, A. Dimoglo, "Quantum chemical calculations and structure-odor relationships investigation for some odorant compounds", Balkan Physics Letters (BPL) , Vol. 9, No. 1, Jan. 2001, pp. 41-46
  • A. Altun, M. Kumru, A. Dimoglo, "The Role of Conformational and Electronic Parameters of Thiosemicarbazone and Thiosemicarbazide Derivatives for Their Dermal Toxicity", J. Mol. Struct. ( THEOCHEM ) , Vol. 572, Jan. 2001, pp. 121-134
  • * A. Altun, M. Kumru, A. Dimoglo, "Study of Electronic and Structural Features of Thiosemicarbazone and Thiosemicarbazide Derivatives Demonstrating Anti-HSV-1 Activity", J. Mol. Struct. ( THEOCHEM) , Vol. 535, Jan. 2001, pp. 235-246
  • * V. I. Dimitrov, A. Gungor and M. Kumru, "Influence of the Rejected Volume on the Size of Grains in Rapid Crystallization from Undercooled Melts", Materials Science Forum, Vol. 360-362, Jan. 2001, pp. 493-498
  • Dimitrov V., A. Gungor, M. Kumru, A. Avinc, "A new kinetic equation for phase transformations of first order", Balkan Physics Letters (BPL) , Vol. 9, No. 1, Jan. 2001
  • M. Ö. Sezer, A. Özmen, M. Kumru, H. Yüksel , "Toluidin Moleküllerinin Elektronik Soğurma Spektroskopisi", S. Ü. Fen-Edebiyat Fakültesi, Fen Dergisi, Vol. 1, Jan. 2000, pp. 51-59
  • A. Altun, M. Kumru, A. Dimoglo, "Quantum mechanical and conformational studies of thiosemicarbazone and thiosemicarbazide derivatives on their toxicity ", Bulg. J. Phys., Vol. 27/2, Jan. 2000, pp. 58-61
  • Caliskan S., E. Sasioglu, E. Nakhmedov, M. Kumru, "Effects of electron-electron interactions and of magnetic field on density of states in disordered metallic systems", Bulg. J. Phys. , Vol. 27/2, Jan. 2000, pp. 94-98
  • Dimitrov V., A.Gungor, M. Kumru, A.Avinc, "A new model of crystal growth from undercooled melts", Bulg. J. Phys. , Vol. 27, No. 2, Jan. 2000, pp. 99-102
  • Koseoglu Y., M. Kumru, A. Dimoglo, "Electronic Aspects of Mutagenic Activity of Some Organic Compounds", Bulg. J. Phys. , Vol. 27, No. Suplement, Jan. 2000, pp. 105-109
  • * E. P. Nakhmedov, H. Feldmann, R. Oppermann and M. Kumru, "Effect of Substitu’tional Impurities on the Electronic States and Conductivity of Crystals with Half - Filled Band", Phys. Rev. B, Vol. 62, Jan. 2000, pp. 13490-13500
  • * E. P. Nakhmedov, M. Kumru, R. Oppermann, "Density of States of Disordered Two – Dimensional Crystals with Half-Filled Band", Phys. Rev. Lett., Vol. 84, Jan. 2000, pp. 3930-3933
  • Y. Köseoğlu, Ö. Burucu, M. Kumru, F. Yıldız, M. Rana and B. Aktaş, "ESR Studies on NiFe2O4 Ferrite", Proceedings of Moscow International Symposium on Magnetism-2005, Dec. 2005, pp. 161-164
  • * Y. Köseoğlu, F. Kurtuluş, H. Koçkar, H. Güler, F. Yıldız, B. Aktaş, "Temperature Dependence of Magnetic Properties for Co3O4 Nanoparticles", (Manuscript), Dec. 2005
  • * Y. Köseoğlu and B. Aktaş, "Size Effects on Magnetic Properties of Fe3O4 Nanoparticles", (Manuscript), Jul. 2005
  • * Y. Köseoğlu, F. Yıldız, B. Aktaş, G. Salazar Alvarez, M. Toprak, M. Muhammed, "ESR measurements on nanocrystalline powders of CoNiO", Physica Status Solidi (b), Vol. 242, No. 8, Jun. 2005, pp. 1712-1718
  • * D.K. Kim, M. S. Amin, S. Elborai, S.H. Lee, Y. Köseoğlu, M. Zahn, M. Muhammed, "Energy absorption of superparamagnetic iron oxide nanoparticles by microwave irradiation", Journal of Applied Physics, Vol. 97, No. 1, May. 2005, pp. 10J510
  • * Y. Köseoğlu, B. Aktaş, M. Rana, "Magnetic properties of Ni1+xTixFe2O4 Ferrites", Manuscript, May. 2005
  • Y. Köseoğlu, B. Aktaş, F. Yıldız, D.K. Kim, M. Muhammed,, "EPR Studies on Na-Oleate Coated Fe3O4 Nanoparticles", Physica Status Solidi C , Vol. 1, No. 12, Dec. 2004, pp. 3511-3515
  • Y. Köseoğlu and B. Aktaş, "ESR Studies on Superparamagnetic Fe3O4 Nanoparticles", Physica Status Solidi C, Vol. 1, No. 12, Dec. 2004, pp. 3516-3520
  • * Ergün Gonca, Yüksel Köseoğlu, Bekir Aktaş, Ahmet Gül, , "Octakis (1-naphthyl-methylthio) substituted porphyrazine derivatives", Polyhedron , Vol. 23, No. 10, Jun. 2004, pp. 1845-1849
  • * Y. Köseoğlu, O. Yalcin, F. Yildiz, B. Aktas, "MAGNETIC MEASUREMENTS ON AN INTERCALATE Fe0.9PS3(Phen)0.4 : AN ESR STUDY", J. Magn. Magn. Mater. , No. 272-276, May. 2004, pp. e1643-e1645
  • * O. Yalçın, F. Yıldız, M. Özdemir, B. Aktaş, Y. Köseoğlu, M. Bal, M.T. Tuominen, "Ferromagnetic resonance studies of Co nanowire arrays", J. Magn. Magn. Mater. , No. 272-276 P3, May. 2004, pp. 1684-1685
  • * F. Yıldız, O. Yalçın, M. Özdemir, B. Aktaş, Y. Köseoğlu, J.S. Jiang, "Magnetic properties of Sm-Co/Fe exchange spring magnets", J. Magn. Magn. Mater. , No. 272-276S, May. 2004, pp. e1941-e1942
  • * Y. Köseoğlu, B. Aktas, F. Yildiz, R.Yilgin, D.K. Kim, M. Toprak, M. Muhammed, "ESR Studies on High Tc Superconductor MgB2", Physica C., Vol. 390, No. 3, Jul. 2003, pp. 197-203
  • * Y. Köseoğlu, F. Yildiz, J.V. Yakhmi, J. Qin, X. Chen,B. Aktas , "X, K, and Q-Band ESR studies on Intercalated Fe0.9PS3(Phen)0.4", J. Magn. & Magn. Mater., Vol. 258-259, Mar. 2003, pp. 141-143
  • * Y. Köseoğlu, F.Yildiz, J.V. Yakhmi, J.Qin, X.Chen, B. Aktas, "EPR Studies on BEDT-TTF intercalated MnPS3 molecular magnet", J. Magn. & Magn. Mater., Vol. 258-259, Mar. 2003, pp. 416-418
  • * KOSEOGLU Y., KUMRU M., DIMOGLO A, "Electronic Aspects of Mutagenic Activity of Some Organic Compounds", Bulgarian Journal of Physics, Vol. 27, Aug. 2000, pp. 105-109
  • * S. Güner, F. Yıldız, B. Rameev and B. Aktaş , "Electron paramagnetic resonance study of ZnAl2S4 spinel", Journal of Physics: Condensed Matter, Vol. 17, No. 25, Jun. 2005, pp. 3943-3952
  • * R. Öztürk, S. Güner, B. Aktaş , A.Gül, "Synthesis, Characterization and EPR Studies on Supramolecular Porphyrazines", Supramolecular Chemistry , Vol. 17, No. 3, Apr. 2005, pp. 233-241
  • S. Güner, M. K. Şener, M.B. Koçak, B. Aktaş , "EPR Studies on 2,9,17,23-tetra-((1,1,2-(tricarbethoxyethyl)) Phthalocyanines Coordinated by Co2+ and Cu2+", , Sep. 2004
  • * K.Gölcük, A.Altun, S.Güner, M.Kumru, B.Aktaş , "Thermal, Vibrational and EPR studies of Cu(II) bromide bis(p- methylaniline) and bis(m- methylaniline) complexes", Spectrochimica Acta Part A , Vol. 60, Jan. 2004, pp. 303-309
  • * S.Güner,B.Rameev,B.Aktaş, "ESR Studies on Er3+ doped YBiPt Compound", Physica Status Solidi-B, Vol. 236, No. 3, Apr. 2003, pp. 645-650
  • * S.Güner,B.Rameev,B.Aktaş, "ESR Study on YBiPt compound doped by Er3+ and Gd3+", Journal of Magnetism and Magnetic Materials, No. 258-259, Feb. 2003, pp. 372-375
  • * B.Aktaş,S.Güner,F.Yıldız,A.Nateprov,A.Siminel,L.Kulyuk, "ESR Study on Cr3+ and Mn2+ doped ZnAl2S4 single crystal", Journal of Magnetism and Magnetic Materials, No. 258-259, Feb. 2003, pp. 409-412
  • * R.Öztürk,S.Güner,B.Aktaş and A.Gül, "Synthesis and ESR Studies of a Soluble Vanadyl Porphyrazine", Synth.React.Inorg.Met-Org.Chem, Vol. (9), No. 31, Nov. 2001, pp. 1623-1630
  • * Sari L, Andricioaei I, "Rotation of DNA around intact strand in Human Topoisomerase I implies distinct mechanisms for positive and negative supercoil relaxation", NUCLEIC ACIDS RESEARCH, Vol. 33, No. 20, Nov. 2005, pp. 6621
  • * Turney JM, Sari L, Yamaguchi Y, Schaefer HF, "The singlet electronic ground state isomers of dialuminum monoxide: AlOAl, AlAlO, and the transition state connecting them", JOURNAL OF CHEMICAL PHYSICS, Vol. 122, No. 9, Mar. 2005, pp. Art. No. 094304
  • * Temelso B, Richardson NA, Sari L, Yamaguchi Y, Schaefer HF, "Characterization of the (X)over-tilde (2)Pi and (A)over-tilde (2)Sigma(+) electronic states of the phosphaethyne cation (HCP+)", JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY, Vol. 4, No. Sp. Iss., Jan. 2005, pp. 707 (invited paper)
  • * Sari L, Andricioaei I, "Effect of External Torque on DNA Topoisomerases: A simulation Study", Biophysical Journal, Vol. 88, No. 1, Jan. 2005, pp. 403A
  • * Sari L, Yamaguchi Y, Schaefer HF, "(3)Sigma(-) and (3)Pi states of GeC and GeSi: The problematic dissociation energy of GeC", JOURNAL OF CHEMICAL PHYSICS, Vol. 119, No. 16, Oct. 2003, pp. 8266
  • * Sari L, McCarthy MC, Schaefer HF, Thaddeus P, "Mono- and dibridged isomers of Si2H3 and Si2H4: the true ground state global minima. Theory and experiment concert", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol. 125, No. 37, Sep. 2003, pp. 11409
  • * Yamaguchi Y, Sari L, Wesolowski SS, Sattelmeyer KW, Schafer HF, "Characterization of the (X)over-tilde (1)Sigma(+), (a)over-tilde (3)Pi and (A)over-tilde (1)Pi electronic states of BBO", MOLECULAR PHYSICS, Vol. 101, No. 9, May. 2003, pp. 1273
  • * Pak C, Sari L, Rienstra-Kiracofe JC, Wesolowski SS, Horny L, Yamaguchi Y, Schaefer HF, "Theoretical characterization of the disilaethynyl anion (Si2H-) ", JOURNAL OF CHEMICAL PHYSICS, Vol. 118, No. 16, Apr. 2003, pp. 7256
  • * Sari L, Peterson KA, Yamaguchi Y, Schaefer HF , "An L-shaped equilibrium geometry for germanium dicarbide (GeC2)? Interesting effects of zero-point vibration, scalar relativity, and core-valence correlation", JOURNAL OF CHEMICAL PHYSICS, Vol. 117, No. 22, Dec. 2002, pp. 10008
  • * Atadinc F, Selcuki C, Sari L, Aviyente V, "Theoretical study of hydrogen abstraction from dimethyl ether and methyl tert-butyl ether by hydroxyl radical", PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Vol. 4, No. 10, Jan. 2002, pp. 1797
  • * Sari L, Yamaguchi Y, Schaefer HF, "Coupled cluster study of the (X)over-tilde(2)Pi and (A)over-tilde(2)Sigma(+) electronic states of the HCGe radical: Renner-Teller splitting and the effects of relativistic corrections", JOURNAL OF CHEMICAL PHYSICS, Vol. 115, No. 13, Oct. 2001, pp. 5932
  • * Sari L, Gonzales JM, Yamaguchi Y, Schaefer HF, "The (X)over-tilde (2)Pi and (A)over-tilde (2)Sigma(+) electronic states of the HCSi radical: Characterization of the Renner-Teller effect in the ground state", JOURNAL OF CHEMICAL PHYSICS, Vol. 114, No. 10, Mar. 2001, pp. 4472
  • * H. W. Lee, S.Caliskan and Hyowon Park , "Mesoscopic effects in a single-mode Datta-Das spin field-effect transistor", V. Journal of Nanoscale Science & Technology, 12, issue 16, 2005, Vol. 12, No. 16, Nov. 2005
  • * H. W. Lee, S.Caliskan and Hyowon Park , "Period Halving in a Single-Mode Datta-Das Spin Field Effect Transistor", Proceedings of the 24th International Conference on Low Temperature Physics, Oct. 2005
  • * H. W. Lee, S.Caliskan and Hyowon Park , "Mesoscopic effects in a single-mode Datta-Das spin field-effect transistor", Phys. Rev. B, 72, 153305, 2005, Vol. 72, No. 153305, Jul. 2005
  • * E. P. Nakhmedov, V. Prigodin, S. Çaliskan, E. Sasioglu , "Effects of correlation on the conductivity of a two-dimensional weakly disordered lattice with particle-hole symmetric energy bands: Metal-insulator transition at half filling", Phys. Rev. B, 66, 233105, 2002, Vol. 66, No. 233105, Dec. 2002, pp. 233105_1-4
  • * S. Caliskan, E.Sasioglu, E. P. Nakhmedov, M. Kumru, O. Cakiroglu, B. Karaoglu , "Mean field approach to the correlation effects on the density of electronic states and conductivity of disordered metals", Phys. Stat.sol.(b) 229, No:3, 1205-1214 (2002), Feb. 2002
  • * S. CALISKAN, E. SASIOGLU, E. P. NAKHMEDOV, M. KUMRU, "Effects of Electon-Electon Interactions and of Magnetic Field on Density of States in Disordered Metallic Systems", Bulgarian Journal of Physics, 27, No: 2, 94-98, 2000, Vol. 27, No. 2, Sep. 2000, pp. 94-98

 

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