Electronic structure of Zn1-xCoxO using photoemission and x-ray absorption spectroscopy

Wi, S. C.; Kang, J.-S.; Kim, J. H.; Cho, S.-B.; Kim, B. J.; Yoon, S.; Suh, B. J.; Han, S. W.; Kim, K. H.; Kim, K. J.; Kim, B. S.; Song, H. J.; Shin, H. J.; Shim, J. H.; Min, B. I.
May 2004
Applied Physics Letters;5/24/2004, Vol. 84 Issue 21, p4233
Academic Journal
Electronic structures of homogeneous bulk samples of Zn0.9Co0.1O which do not exhibit diluted ferromagnetic semiconducting (DMS) behavior have been investigated using photoemission spectroscopy and x-ray absorption spectroscopy. We have found that the Co ions in Zn1-xCoxO are in the divalent Co2+(d7) states under the tetrahedral symmetry. Our finding indicates that the DMS properties will not be produced when Co ions are properly substituted for Zn sites, implying that the DMS properties observed in Zn1-xCoxO thin films are likely to be extrinsic. © 2004 American Institute of Physics.


Related Articles

  • Energy level offset at organic semiconductor heterojunctions. Rajagopal, A.; Wu, C.I.; Kahn, A. // Journal of Applied Physics;3/1/1998, Vol. 83 Issue 5, p2649 

    Presents information concerning the ultraviolet photoemission spectroscopy of the electronic structure of three organic-organic heterojunctions. Direct measurement of the energy offsets between highest occupied molecular orbitals; Demonstration of the existence of the charge transfer-induced...

  • The effect of defects on the electronic structure of long chain ferroelectric polymers. Xiao, Jie; Zhou, Xin; Zhang, Q. M.; Dowben, P. A. // Journal of Applied Physics;Aug2009, Vol. 106 Issue 4, p044105-1 

    The apparent molecular density of states from combined photoemission and inverse photoemission spectroscopies is compared to the bulk conductivity and frequency dependent dielectric measurements for a variety of ferroelectric polymer poly(vinylidene fluoride) (PVDF) copolymers and terpolymers....

  • Direct angle resolved photoemission spectroscopy and superconductivity of strained high-Tc films. Pavuna, Davor; Ariosa, Daniel; Cloetta, Dominique; Cancellieri, Claudia; Abrecht, Mike // Pramana: Journal of Physics;Feb2008, Vol. 70 Issue 2, p237 

    Since 1997 we systematically perform direct angle resolved photoemission spectroscopy (ARPES) on in-situ grown thin (<30 nm) cuprate films. Specifically, we probe low-energy electronic structure and properties of high-Tc superconductors (HTSC) under different degrees of epitaxial (compressive...

  • Spin-polarized photoemission spectroscopy of the MgO/Fe interface on GaAs(100). Matthes, F.; Tong, L.-N.; Schneider, C. M. // Journal of Applied Physics;6/1/2004, Vol. 95 Issue 11, p7240 

    We studied the electronic band states at the Fe/MgO interface with spin-polarized photoemission using excitation energies between 35 and 60 eV. Epitaxial Fe films on GaAs(100) were covered with 0.5, 1, and 1.5 ML thick MgO films. The photoemission spectra revealed a spin-dependent attenuation...

  • Thickness-dependent electronic structure of ultrathin SrRuO3 films studied by in situ photoemission spectroscopy. Toyota, D.; Ohkubo, I.; Kumigashira, H.; Oshima, M.; Ohnishi, T.; Lippmaa, M.; Takizawa, M.; Fujimori, A.; Ono, K.; Kawasaki, M.; Koinuma, H. // Applied Physics Letters;10/17/2005, Vol. 87 Issue 16, p162508 

    In situ thickness-dependent photoemission spectroscopy (PES) has been performed on SrRuO3 (SRO) layers deposited on SrTiO3 substrates to study the structure-induced evolution of the electronic structure. The PES spectra showing the existence of two critical film thicknesses reveal that a...

  • Influence of 4f electronic states on the surface states of rare-earth hexaborides. Patil, Swapnil; Adhikary, Ganesh; Balakrishnan, Geetha; Maiti, Kalobaran // Applied Physics Letters;3/1/2010, Vol. 96 Issue 9, p092106 

    We study the surface electronic structure of a series of rare-earth hexaborides using state-of-the-art high resolution photoemission spectroscopy. Experimental results reveal a surface state around 1.8 eV binding energy in all the hexaborides indicating its generic nature in this class of...

  • The metallofullerene Tm@C[sub 82] : isomer-selective electronic structure. Pichler, T.; Knupfer, M.; Golden, M.S.; Böske, T.; Fink, J.; Kirbach, U.; Kuran, P.; Dunsch, L.; Jung, C. // Applied Physics A: Materials Science & Processing;1998, Vol. 66 Issue 3, p281 

    Abstract. We present studies of the electronic structure and the optical properties of the endohedral monometallofullerene Tm@C[sub 82] using photoemission and electron energyloss spectroscopy in transmission. In particular, the impact of the isomer symmetry of the C[sub 82] cage (C[sub s] or...

  • The electronic properties of potassium doped copper-phthalocyanine studied by electron energy-loss spectroscopy. Flatz, K.; Grobosch, M.; Knupfer, M. // Journal of Chemical Physics;6/7/2007, Vol. 126 Issue 21, p214702 

    The authors have studied the electronic structure of potassium doped copper-phthalocyanine using electron energy-loss spectroscopy. The evolution of the loss function indicates the formation of distinct KxCuPc phases. Taking into account the C1s and K2p core level excitations and recent results...

  • Influence of the alkyl-chains length on the electronic structure and interface properties of 1,4-octasubstituted zinc phthalocyanines on gold. Dick, S.; Peisert, H.; Dini, D.; Hanack, M.; Cook, M. J.; Chambrier, I.; Chassé, T. // Journal of Applied Physics;4/1/2005, Vol. 97 Issue 7, p073715 

    We compare the interface properties of various 1,4,8,11,15,18,22,25 octa-alkyl-substituted zinc phthalocyanines [(But)8PcZn, (Hep)8PcZn, (Dec)8PcZn] with those of unsubstituted zinc phthalocyanine (PcZn) on gold using x-ray photoemission spectroscopy and valence band ultraviolet photoemission...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics