Gang Cao

cao's picture
Education: 
Ph.D. Temple University, 1992
Graduate Training: 
Condensed Matter Physics
Biography: 
  • Jack and Linda Gill Eminent Professor, 2011-Present
  • Director, Center for Advanced Materials, 2008-Present
  • University Research Professor, 2009-2010
  • Fellow of the American Physical Society, 2009
  • Professor of Physics, University of Kentucky, 2007-Present
  • Associate Professor of Physics, University of Kentucky, 2002-2007
  • Associate Scientist, National High Magnetic Field Lab, Tallahassee, Florida, 1998-2002
  • Assistant Scientist, National High Magnetic Field Lab, Tallahassee, Florida, 1995-1998
  • Post-Doctoral Research Associate, National High Magnetic Field Lab, Tallahassee, Florida, 1992-1995
Research: 
  • Discovery and characterization of novel electronic materials
  • Single-crystal synthesis
  • Physics of complex oxides and chalcogenides
  • High-field, low-temperature, and high-pressure material properties

 

 

 

Selected Publications: 

 

Book:   Frontiers of 4d- and 5d- Transition Metal Oxides, Gang Cao and Lance E. De Long, World Scientific,  ISBN: 978-981-4374-859   328 pp  August 2013

http://www.worldscientific.com/worldscibooks/10.1142/8331

(Author of more than 170 articles in refereed journals)

  • “Novel magnetism of Ir5+ (5d4) ions in the double perovskite Sr2YIrO6”, G. Cao, T. F. Qi, L. Li, J. Terzic, S. J. Yuan, L. E. DeLong, G. Murthy and R. K. Kaul, Phys. Rev. Lett. 112, 056402 (2014)
  • “Evolution of Magnetism in Single-Crystal Honeycomb Iridates”, G. Cao, T. F. Qi,  L. Li,  J. Terzic,  V. S. Cao, S. J. Yuan, M. Tovar,  G. Murthy,  and R. K. Kaul, Phys. Rev. B  88 220414(R) (2013)
  • "Ferromagnetic Anisotropy from Antiferromagnetic Superexchange in the Mixed 3d − 5d Transition-Metal Compound Sr3CuIrO6", Wei-Guo Yin,  X. Liu,  A. M. Tsvelik,  M. P. M. Dean,  M. H. Upton, Jungho Kim, D. Casa, A. Said,  T. Gog,  T. F. Qi,  G. Cao, and J. P. Hill,  Phys. Rev. Lett. 111, 057202 (2013)
  • "Tuning Jeff = 1/2 Insulating State via Electron Doping and Pressure in Double-Layered Iridate Sr3Ir2O7”, L. Li, P. P. Kong, T. F. Qi, C. Q. Jin, S. J. Yuan, L. E. DeLong, P. Schlottmann and G. Cao, Phys. Rev. B 87, 235127 (2013)
  •  “Giant vertical magnetization shift induced by spin canting in a Co/Ca2(Ru 0.98Fe 0.02)O4  heterostructure” , S. J. Yuan, L. Li, T. F. Qi, L. D. DeLong and G. Cao, Phys. Rev. B 88, 024413 (2013). Selected as Editors Suggestion. 
  • “The magnetic and crystal structures of Sr2IrO4: A neutron diffraction study”, Feng Ye, Songxue Chi, Bryan C. Chakoumakos, Jaime A. Fernandez-Baca, Tongfei Qi, and G. Cao, Phys. Rev. B 87, 140406(R) (2013)
  • Weak magnetic transitions in pyrochlore Bi2Ir2O7”, P. J. Baker, J. S. MÄoller, F. L. Pratt, W. Hayes, S. J. Blundell, T. Lancaster, T.-F. Qi, and G. Cao, Phys. Rev. B 87 180409 (R) (2013)
  • "Superconductivity and anomalous electrical resistivity in single-crystal Ir3Te8”, L. Li, T. F. Qi, L. S. Lin, X. X. Wu, X.T. Zhang, K. S. J. Yuan, Butrouna, V. S. Cao, Y. H. Zhang, Jiangping Hu, S. J. Yuan, P.  Schlottmann, L. E. DeLong and G. Cao, Phys. Rev. B 87, 174510 (2013)
  • "Dimensionality controlled Mott transition in single- and bi-layer perovskite iridates”, Q. Wang, Y. Cao, J. A. Waugh, T. F. Qi, O. B. Korneta, G. Cao, and D. S. Dessau, Phys. Rev. B 87 245109 (2013)
  • "Spin switching and magnetization reversal in single-crystal NdFeO3, S. J. Yuan, Wei Ren, Fang Hong, La Chen, Yabin Wang, Jincang Zhang, L. Bellaiche, Shixun Cao, and G. Cao, Phys. Rev. B 87, 184405 (2013)
  • "Orbit-coupling limit for octahedrally coordinated iridate compounds in a model system Sr3CuIrO6”, X. Liu, Vamshi Katukuri, Liviu Hozoi, Wei-Guo Yin, M. P. M. Dean, Mary Upton, Jungho Kim, Diego Casa, Tongfei Qi, G. Cao, A. M. Tsvelik, Jeroen van den Brink, and J. P. Hill, Phys. Rev. Lett. 109, 157401 (2012)
  • “Spin-orbit tuned metal-insulator transitions in single-crystal Sr2Ir1-xRhxO4 (0<x<1)”, T. F. Qi, O. B. Korneta, L. Li, K. Butrouna, V. S. Cao, Xiangang Wan, R. Kaul and G. Cao, Phys. Rev. B 86, 125105 (2012)
  • “Pressure-Tuning of Spin-Orbit Coupled Ground State in Sr2IrO4, D. Haskel, G. Fabbris, Mikhail Zhernenkov, M. van Veenendaal, P. Kong, C. Jin, G. Cao,  Phys. Rev. Lett. 109, 027204 (2012)
  • “Observation of a metal-to-insulator transition with both Mott-Hubbard and Slater charateristics in Sr2IrO4 from time-resolved photo-carrier dynamics”, D. Hsieh, F. Mahmood, D. Torchinsky, G. Cao and N. Gedik, Phys. Rev. B 86, 035128 (2012)
  • "Direct Evidence of a Zigzag Spin-Chain Structure in Honeycomb Lattice: A Neutron and X-Ray Diffraction Investigation on Single-Crystal Na2IrO3", Feng Ye, Songxue Chi, Huibo Cao, Bryan Chakoumakos, Jaime A. Fernandez-Baca, Radu Custelcean, Tongfei Qi, O. B. Korneta, and G. Cao, Phys. Rev. B. 85, 180403(R) (2012)
  • "Magnetic and Orbital Orders Coupled to Negative Thermal Expansion in Mott Insulators Ca2Ru1-xMxO4 (M=Mn and Fe)", T. F. Qi, O. B. Korneta, S. Parkin, Jianping Hu and G. Cao, Phys. Rev. B 85, 165143 (2012)
  • "Lattice-Driven Magnetoresistivity and Metal-Insulator Transition in Single-Layered Iridates", M. Ge,  T. F. Qi, O.B. Korneta, L.E. De Long, P. Schlottmannand G. Cao, Phys Rev B 84, Rapid Comm., 100402(R) (2011)
  • “Measurements of the Internal Magnetic Field in the Correlated Iridates Ca4IrO6, Ca5Ir3O12, Sr3Ir2O7 and Sr2IrO4”, I. Franke, P.J. Baker, S.J. Blundell, T. Lancaster, W. Hayes, F.L. Pratt, and G. Cao, Phys. Rev. B 83, 094416 (2011)
  • “Single-Crystal Ca2Ru1-xCrxO4: Negative Volume Thermal Expansion via Orbital and Magnetic Orders”, T.F. Qi, O.B. Korneta, S. Parkin, L.E. DeLong, P. Schlottmann and G. Cao, Phys Rev Lett 105, 177203 (2010)
  •  “Orbital Magnetism and Spin-Orbit Effects in the electronic structure of BaIrO3”, M. A. Laguna-Marco, D. Haskel, N. Souza-Neto, J. C. Lang, V. V. Krishnamurthy, S. Chikara, G. Cao, and Michel van Veenendaal, Phys Rev Lett 105, 216407 (2010)
  • "Electron-Doped Sr2IrO4-d (0 < d < 0.04):  Evolution of a Disordered Jeff = 1/2 Mott Insulator into an Exotic Metallic State” , O.B. Korneta, Tongfei Qi, S. Chikara, S. Parkin, L. E. DeLong, P. Schlottmann and G. Cao, Phys Rev B 82, 115117 (2010)
  • "Pressure-induced Insulating State in Single-Crystal Ba1-xGdxIrO3”, O. Korneta, S. Chikara, L.E. DeLong. P. Schlottmann and G. Cao, Phys. Rev. B 81, 045101 (2010)
  • "Giant Magneto-electric Effect in the Jeff=1/2 Mott Insulator, Sr2,IrO4", S. Chikara, O. Korneta, W.P. Crumett, L.E. DeLong, P. Schlottmann and G. Cao, Phys. Rev. B 80, 140407(R) (2009)
  • "Bandwidth-Controlled Insulator-Metal Transition and Correlated Metallic State in 5d Srn+1IrnO3n+1 (n=1, 2, and 1)", S.J. Moon, H. Jin, K.W. Kim, W.S. Choi, Y.S. Lee, J. Yu, G. Cao, A. Sumi, H. Funakubo, C. Bernhard, and T.W. Noh, Phys. Rev. Lett. 101, 226401 ( 2008)
  • (Ivited Review) "Ca3Ru2O7: A New Paradigm for Spintronics", G. Cao, and P. Schlottmann, Modern Physics Letters B 22, 1785-1813( 2008)
  • "Novel Jeff 1=2 Mott State Induced by Relaivistic Spin-Orbit Coupling in Sr2IrO4", B. J. Kim, Hosub Jin, S. J. Moon, J.-Y. Kim, B.-G. Park, C. S. Leem, Jaejun Yu, T. W. Noh, C. Kim, S.-J. Oh, V. Durairai, G. Cao and J.-H. Park, Phys. Rev. Lett. 101, 076402 (2008)
  • "Observation of Strong Spin Valve Effect in bulk Ca3 (Ru1-x Crx )2 O7", G. Cao, V. Durairaj, S. Chikara, and L.E. DeLong, Phys. Rev. Lett. 100, 016604 (2008).
  • "Non-Fermi-Liquid behavior in nearly ferromagnetic metal SrIrO3 single crystals", G. Cao, V. Duarairaj, S. Chikara, L.E. DeLong, S. Parkin, and P. Schlottmann, Phys. Rev. B 76, 100402(R) ( 2007)
  • "Partial Antiferromagnetism in Spin-Chain Sr5Rh4O12, Ca5Ir3O12 and Ca4IrO6Single Crystals" G. Cao, V. Durairaj, S. Chikara, S. Parkin and P. Schlottmann, Phys. Rev. B 75,134402 (2007)
  • "Studies on the Weak Itinerant Ferromagnet SrRuO3 under High Pressure to 34 GPa", J.J. Hamilin, S. Deemyad, J.S. Schilling, M.K. Jacobsen, R.S. Kumar, A.L. Cornelius, G. Cao and J.J. Neumeier, Phys. Rev. B 76, 014432 (2007)
  • "Anomalous Itinerant Magnetism in Single-Crystal Sr4Ru3O10: A Thermodynamic and Transport Investigation" G. Cao, S. Chikara, J. W. Brill, and P. Schlottmann, Phys. Rev. B 75 024429 (2007)
  • "Electronic Structures of Layered Perovskite Sr2MO4 (M=Ru, Rh, and Ir)",S. J. Moon, M. W. Kim, K. W. Kim, Y. S. Lee, J.-Y. Kim, J.-H. Park, B. J. Kim, S.-J. Oh, S. Nakatsuji, Y. Maeno, I. Nagai, S. I. Ikeda, G. Cao, and T. W. Noh, Phys. Rev. B 74, 113104 (2006)
  • "Borderline Magnetism in Sr4Ru3O10: Impact of Dilute La and Ca Doping on Itinerant Ferromagnetism and Metamagnetism", S. Chikara , V. Durairaj, W.H. Song, Y.P. Sun, X.N. Lin, A. Douglass, G. Cao, P. Schlottmann, and S. Parkin, Phys. Rev. B 73, 224420 (2006)
  • "Field- and Pressure-Induced Phases in Sr4Ru3O10: A Spectroscopic Investigation" Rajeev Gupta, M. Kim, H. Barath, S.L. Cooper and G. Cao, Phys. Rev. Lett. 96, 067004 (2006)
  • "Highly Anisotropic Magnetism in Cr Doped Perovskite Ruthenates", V. Durairaj, S. Chikara, X.N. Lin, A. Douglass, G. Cao, P. Schlottmann, E.S.Choi and R.P. Guertin, Phys. Rev. B 73, 214414 (2006)
  • "Observation of Quantum Oscillations Periodic in 1/B and B in Bilayered Ca3Ru2O7 ", V. Durairaj, X. N. Lin, Z.X. Zhou, S Chikara, E. Elhami, P. Schlottmenn and G. Cao, Phys. Rev. B 73, 054434 (2006)
  • "Spectroscopic Study of the Field- and Pressure-Induced Phases of the Bilayered Ruthenate Ca3Ru2O7", J. F. Karpus, C. S. Snow, R. Gupta, H. Barath, S. L. Cooper, and G. Cao, Phys. Rev. B 73, 134407 (2006)
  • "Colossal Magnetoresistance by Avoiding a Ferromagnetic State in Mott System Ca3Ru2O7", X. N. Lin, Z.X. Zhou, V. Durairaj, P. Schlottmenn and G. Cao, Phys. Rev. Lett. 95, 017203 (2005)
  • "Thermal and magnetic Properties of Spin-Chain Material, Pr3Ru2O7", M. Fremat, X.N. Lin, V. Durairaj, S.Chikara, G. Cao, and J.W. Brill, Phys. Rev. B 72, 014458 (2005)
  • "From Itinerant Ferromagnetism to Insulating Antiferromagnetism: a Magnetic and Transport Study of Single Crystal SrRu1-xMnxO3 (0=x<0.60)", G. Cao, S. Chikara, E. Elhami, X.N. Lin and P. Schlottmann, Phys. Rev. B 71, 035104 (2005)
  • "Angle-resolved de Hass-van Alphen Study of SrRuO3", C. S. Alexander, S. McCall, P. Schlottmann, J. E. Crow and G. Cao, Phys. Rev. B 72, 24415 (2005)
  • "Field-Induced Orbital and Magnetic Phases in Ca3Ru2O7 : Light Scattering Studies", J.F. Karpus, R. Gupta, Barath, S.L. Cooper and G. Cao, Phys. Rev. Lett.93, 167205 (2004)
  • (Invited Paper) Orbitally-driven Behavior: Mott Transition, Quantum Oscillations and Colossal Magnetoresistance in Bilayered Ca3Ru2O7", G. Cao, X.N. Lin, L. Balicas, S. Chikara, J.E. Crow and P. Schlottmann, a special issue on Orbital Physics, New Journal of Physics 6, 159 (2004). http://www.iop.org/EJ/news/-topic=842 or http://www.iop.org/EJ/abstract/1367-2630/6/1/159/ (This paper was selected as IOP Select (IOP=Institute of Physics in Europe))
  • "Transport and Thermodynamic Properties of Sr3Ru2O7 Near the Quantum Critical Point", Z.X Zhou, S. McCall, C.S. Alexander, J.E. Crow, P.Schlottmann, A. Bianchi, C. Capan, R. Movshovich, K.H. Kim, M. Jaime, and N. Harrison, M. Haas, R. Cava and G. Cao, Phys. Rev B 69, 140409 (2004)
  • "High-temperature Weak Ferromagnetism on the Verge of a Metallic State: Impact of Dilute Sr-doping on BaIrO3 ", G. Cao, S. Chikara, X.N. Lin, E. Elhami and V. Durairaj, Phys. Rev. B 69, 174418 (2004)
  • "Field-Tuned Collapse of an Orbital Ordered and Spin-polarized State: Colossal Magnetoresistance in Bilayered Ruthenate", G. Cao, L. Balicas, X.N. Lin, S. Chikara, V. Durairaj, E. Elhami, J.W. Brill, R.C. Rai and J. E. Crow, Phys. Rev. B 69, 014404 (2004)
  • “Dimer Liquid State in the Quantum Antiferromagnetic Compound LiCu2O2” S. Zvyagin S, G. Cao, Y. Xin, S. McCall, T. Caldwell, W. Moulton, L.C. Brunel, A. Angerhofer, J.E. Crow, Phys. Rev. B 69, 189901 (2004)
  • "Competing Ground State in Triple-layered Sr4Ru3O10: Verging on Itinerant Ferromagnestism with Critical Fluctuations”, G. Cao, L. Balicas, W. H. Song, Y.P. Sun, Y. Xin, V.A. Bondarenko, J.W. Brill, S. Parkin, and X.N. Lin, Phys. Rev. B 68 174409 (2003)
  • "Coloassal Magnetoresistance, Quantum Oscillations and Magnetoelastic Interactions in Bilayered Ca3Ru2O7”, G. Cao, L. Balicas, Y. Xin, J.E. Crow, and C.S. Nelson, Phys. Rev. B 67, 184405 (2003)
  • "Impact of Magnetic Fields on Anisotropy in Ca3Ru2O7”, S. McCall, G. Cao, and J.E. Crow, Phys. Rev. B 67, 094427 (2003)
  • "Mean Field Behavior with Gaussian Fluctuations at the Ferromagnettic Phase Transition of SrRuO3”, D. Kim, B.L. Zink, F. Hellman, S. McCall, G. Cao, and J.E. Crow, Phys. Rev. B 67, 100406 (R) (2003)
  • “Tunneling Magnetoresistance and Quantum Oscillations in Bilayered Ca3Ru2O7”, G. Cao, L. Balicas, Y. Xin,  E. Dagotto, J.E. Crow, C.S. Nelson, and D.F. Agterberg, Phys. Rev. B 67 060406(R) (2003)
  • "Pressure-Tuned Collapse of the Mott-like State in Can+1RunO3n+1 (n=1,2): Raman Spectroscopic Stduies”, C.S. Snow, S.L. Cooper, G. Cao, J.E. Crow, S. Natatsuji, and Y. Maeno, Phys. Rev. Lett. 89, 226401 (2002)
  • “Temperature-dependent Raman Spectroscopy in BaRuO3 Systems”, Y.S. Lee, T.W. Noh, J.H. Park, K.-B. Lee, G. Cao, J.E. Crow, M.K. Lee, C. B. Eom, E.J. Oh and In-Sang Yang, Phys. Rev. B 65, 235113 (2002)
  • "Sensitivity to Disorder of the Metallic State in the Ruthenates”, L. Capogna, A. P. Mackenzie, R. S. Perry, S. A. Grigera, L. M. Galvin, P. Raychaudhuri, A. J. Schofield, C. S. Alexander, G. Cao, S. R. Julian, and Y. Maeno, Phys. Rev Lett. 88, 76602 (2002)
  • "Dimer Liquid State in the Quantum Antiferromagnet LiCu2O2: ESR Studies”, S. Svyagin, G. Cao, A. Angerhofer, Y. Xin, T. Caldwell, W. Moulton, L.-C. Brunel, and J.E. Crow, Phys. Rev. B 66, 064424 (2002)
  • "Structure and Magnetism of Single Crystal Sr4Ru3O10: A Ferromagnetic Triple-Layered Ruthenates” M.K. Crawford, R.L. Harlow, W. Marshall, Z. Li, G. Cao, R.L. Lindstrom, Q. Huang, and J.W. Lynn. Phys. Rev. B 65, 214412 (2002)
  • "Anomalous Magnetic and Transport Properties in Magnetic Insulator Sr3Ir2O7”, G. Cao, Y. Xin, C. S. Alexander, J.E. Crow and P. Schlottmann, Phys. Rev. B 66, 214412 (2002)
  • "Weak Ferromagnetism and Spin-Charge Coupling in Single Crystal Sr2YRuO6”, G. Cao, C.S. Alexander, Y Xin and J.E. Crow, Phys. Rev. B 63,184432 (2001)
  • "Pseudogap Formation in 4d-transition Metal Oxide BaRuO3”, Y.S. Lee, T.W. Noh, Jaejun Yu, J.S. Lee, K.W. Kim, E.J. Choi, G. Cao, and J.E. Crow, Europhys. Lett. 55, 280 (2001)
  • "Magnetic Ordering and Enhanced Specific Heat in Insulating Ln2RuO5 (Ln=Nd, Pr, Sm, Gd and Tb)”, G. Cao, S. McCall, Z.X. Zhou, C.S. Alexander, and J.E. Crow, Phys. Rev. B 63, 144427 (2001)
  • "Spin-Charge Coupling for Dilute La-doped Ca3Ru2O7”, G. Cao, K. Abbound, S. McCall, J.E. Crow and R.P.Guertin, Phys. Rev. B 62, 998 (2000)
  • "Charge Density Wave Formation Accompanying Ferromagnetic Ordering in Quasi-one-dimensional BaIrO3”, G. Cao, J.E. Crow, R.P. Guertin, P. Henning, C.C. Homes, M. Strongin, D.N. Basov, and E. Lochner, Solid State Comm. 113, 657 (2000)
  •  "Ground-State Instability of Mott Insulator Ca2RuO4: Impact of Slight La-doping on Metal-Insulator Transition and Magnetic Ordering”, G. Cao, S. McCall, V. Dobrosavljevic, S.C. Alexander, and J.E. Crow, and R.P. Guertin, Phys. Rev. B 61, R5053 (2000)
  • "Raman Scattering Study of the Charge and Spin Dynamics of the Layered Ruthenium Oxide Ca3Ru2O7”, H.L. Liu, S. Yoon, S.L. Cooper and G. Cao, Phys. Rev. B 60, R6980, (1999)
  • "Destruction of the Mott Insulating Ground State of Ca2RuO4 by a Structural Transition,” C.S. Alexander, G. Cao, V. Dobrosavljevic, E. Lochner, S. McCall, J.E. Crow and P.R. Guertin, Phys. Rev. B 60, R8422 (1999)
  • "Weak Ferromagnetism, Metal-to-Nonmetal Transition and Negative Differential Resistivity in Single Crystal Sr2IrO4”, G. Cao, J. Bolivar, S. McCall, J.E. Crow, and R.P. Guertin, Phys. Rev. B, 57, R11039 (1998)
  • "Layered Ruthenium Oxides: From Band Metal to Mott Insulator”, A.V. Puchkov, M.C. Schabel, D.N Basov, T. Startseva,  G. Cao, T. Timusk, and Z.-X. Shen, Phys. Rev. Lett. 81, 2747 (1998)
  • "High-field Electron Spin Resonance of Cu1-xZnxGeO3”, A.K. Hassan, L.A. Pardi, G.B. Martins, G. Cao, and L-C. Brunnel, Phys. Rev. Lett. 80, 1984 (1998)
  • "Magnetic and Transport Properties of Single Crystal Ca2RuO4: Relationship to Superconducting Sr2RuO4”, G. Cao, S. McCall, M. Shepard, J.E. Crow and R.P. Guertin, Phys. Rev. B 56, R2916 (1997)
  • "Thermal, Magnetic and Transport Properties of Single Crystal Sr1-xCaxRuO3 (0 £ x£ 1.0)”, G. Cao, S. McCall, M. Shepard, J. E. Crow, and R. P. Guertin, Phys. Rev. B 56, 321 (1997)
  • "Observation of a Metallic Antiferroamgnetic Phase and Metal-Nonmetal Transition in Ca3Ru2O7”, G. Cao, S. McCall, J.E. Crow and R.P. Guertin,  Phys. Rev. Lett. 78, 1751  (1997)
  • "Observation of Pr Magnetic Order in PrBa2Cu3O7”, S. Skanthakumar, J.W. Lynn,  N. Rosov, G. Cao, and J.E. Crow, Phys. Rev. B 55, R3406 (1997)
  • "Itinerant-to-Localized Electron Transition in Peroviskites CaRu1-xSnxO3 and SrRu1-xPbxO3”, G. Cao, S. McCall, J. Bolivar, M. Shepard, F. Freibert J.E. Crow, Phys. Rev. B 54, 15144 (1996)
  • "Observation of an Anomalous Quasi-One-Dimensional Behavior in Na2Ru4O9 Single Crystals”, G. Cao, S. McCall, M. Shepard, and J. E. Crow, Phys. Rev. B 53, 12215 (1996)
  • "High Dielectric Permittivity of Ceramic and Single Crystal PrBa2Cu3Ox", P. Mazzara, S. Skirus, G. Cao, J.W. O'Reilly, J.E.  Crow, and L.R. Testardi, Phys. Rev. B 47, 8119 (1993)
  • "Enhanced Electric Polarizability at Magnetic Ordering Temperature of La2CuO4+x", G. Cao, J.W. O'Reilly, J.E. Crow, and L.R. Testardi, Phys. Rev. B 47, 11510 (1993)

 

 

 

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