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J M Gil - One of the best experts on this subject based on the ideXlab platform.

  • Shallow Donor state of hydrogen in in 2 o 3 and sno 2 implications for conductivity in transparent conducting oxides
    Physical Review B, 2009
    Co-Authors: P D C King, J M Gil, H V Alberto, R C Vilao, Piroto J Duarte, R L Lichti, Y G Celebi, Dj Payne, R G Egdell, Iain Mckenzie
    Abstract:

    Muonium, and by analogy hydrogen, is shown to form a Shallow-Donor state in In2O3 and SnO2. The paramagnetic charge state is stable below similar to 50 K in In2O3 and similar to 30 K in SnO2 which, coupled with its extremely small effective hyperfine splitting in both cases, allows its identification as the Shallow-Donor state. This has important implications for the controversial issue of the origins of conductivity in transparent conducting oxides.

  • Shallow Donor state of hydrogen in in 2 o 3 and sno 2 implications for conductivity in transparent conducting oxides
    Physical Review B, 2009
    Co-Authors: P D C King, J M Gil, H V Alberto, R C Vilao, Piroto J Duarte, R L Lichti, Y G Celebi, Dj Payne, R G Egdell, Iain Mckenzie
    Abstract:

    Muonium, and by analogy hydrogen, is shown to form a Shallow-Donor state in ${\text{In}}_{2}{\text{O}}_{3}$ and ${\text{SnO}}_{2}$. The paramagnetic charge state is stable below $\ensuremath{\sim}50\text{ }\text{K}$ in ${\text{In}}_{2}{\text{O}}_{3}$ and $\ensuremath{\sim}30\text{ }\text{K}$ in ${\text{SnO}}_{2}$ which, coupled with its extremely small effective hyperfine splitting in both cases, allows its identification as the Shallow-Donor state. This has important implications for the controversial issue of the origins of conductivity in transparent conducting oxides.

  • probing the Shallow Donor muonium wave function in zno and cds via transferred hyperfine interactions
    Physica B-condensed Matter, 2001
    Co-Authors: J S Lord, S P Cottrell, P J C King, J M Gil, H V Alberto, R C Vilao, Piroto J Duarte, Ayres N De Campos, R L Lichti, S K L Sjue
    Abstract:

    Abstract The assignment of muon spin rotation spectra to muonium counterparts of hydrogen Shallow–Donor states is reviewed in four II–VI widegap semiconductors, CdS, CdSe, CdTe and ZnO. The existence of extended electronic orbitals is argued from the muon–electron hyperfine parameters and supported by the new muon spin repolarization data for CdS and ZnO, characterizing the superhyperfine parameters on the sparse Cd and Zn dipolar nuclei. The possibility of a more tightly bound electron occupying a compact orbital is reasonably excluded in these materials, contrasting with the muonium state in HgO.

  • Shallow Donor muonium states in ii vi semiconductor compounds
    Physical Review B, 2001
    Co-Authors: J M Gil, E A Davis, S P Cottrell, H V Alberto, R C Vilao, Piroto J Duarte, Ayres N De Campos, A Weidinger, J Krauser, S F J Cox
    Abstract:

    Experimental data on Shallow Donor muonium states in the II-VI semiconductor compounds CdS, CdSe, CdTe, and ZnO are presented. These are characterized by very weak hyperfine interactions amounting to approximately 10{sup -4} of the free-atom value, and by Donor levels with binding energies comparable to those calculated on the hydrogenic model of the Shallow centers. The data are discussed in terms of a model generalizing the knowledge of muonium and hydrogen states in tetrahedrally bonded semiconductors. Within this model the Shallow muonium state is attributed to muonium bound to the anion of the II-VI compound and located at the antibonding site or close to it in the bond direction.

  • experimental confirmation of the predicted Shallow Donor hydrogen state in zinc oxide
    Physical Review Letters, 2001
    Co-Authors: E A Davis, S P Cottrell, P J C King, J S Lord, J M Gil, H V Alberto, R C Vilao, Piroto J Duarte, Ayres N De Campos, A Weidinge
    Abstract:

    : We confirm the recent prediction that interstitial protium may act as a Shallow Donor in zinc oxide, by direct spectroscopic observation of its muonium counterpart. On implantation into ZnO, positive muons--chemically analogous to protons in this context--form paramagnetic centers below about 40 K. The muon-electron contact hyperfine interaction, as well as the temperature and activation energy for ionization, imply a Shallow level. Similar results for the cadmium chalcogenides suggest that such Shallow Donor states are generic to the II-VI compounds. The Donor level depths should serve as a guide for the electrical activity of interstitial hydrogen.

H V Alberto - One of the best experts on this subject based on the ideXlab platform.

  • Shallow Donor state of hydrogen in in 2 o 3 and sno 2 implications for conductivity in transparent conducting oxides
    Physical Review B, 2009
    Co-Authors: P D C King, J M Gil, H V Alberto, R C Vilao, Piroto J Duarte, R L Lichti, Y G Celebi, Dj Payne, R G Egdell, Iain Mckenzie
    Abstract:

    Muonium, and by analogy hydrogen, is shown to form a Shallow-Donor state in In2O3 and SnO2. The paramagnetic charge state is stable below similar to 50 K in In2O3 and similar to 30 K in SnO2 which, coupled with its extremely small effective hyperfine splitting in both cases, allows its identification as the Shallow-Donor state. This has important implications for the controversial issue of the origins of conductivity in transparent conducting oxides.

  • Shallow Donor state of hydrogen in in 2 o 3 and sno 2 implications for conductivity in transparent conducting oxides
    Physical Review B, 2009
    Co-Authors: P D C King, J M Gil, H V Alberto, R C Vilao, Piroto J Duarte, R L Lichti, Y G Celebi, Dj Payne, R G Egdell, Iain Mckenzie
    Abstract:

    Muonium, and by analogy hydrogen, is shown to form a Shallow-Donor state in ${\text{In}}_{2}{\text{O}}_{3}$ and ${\text{SnO}}_{2}$. The paramagnetic charge state is stable below $\ensuremath{\sim}50\text{ }\text{K}$ in ${\text{In}}_{2}{\text{O}}_{3}$ and $\ensuremath{\sim}30\text{ }\text{K}$ in ${\text{SnO}}_{2}$ which, coupled with its extremely small effective hyperfine splitting in both cases, allows its identification as the Shallow-Donor state. This has important implications for the controversial issue of the origins of conductivity in transparent conducting oxides.

  • Shallow Donor versus deep acceptor state in ii vi semiconductor compounds
    Physica B-condensed Matter, 2003
    Co-Authors: A Weidinger, H V Alberto, R C Vilao, Piroto J Duarte, Ayres N De Campos
    Abstract:

    Abstract Information on the properties of the possible muonium states in II–VI semiconductor compounds is obtained in this study. In these materials, muonium may either form a Shallow Donor state, which is characterized by a small hyperfine interaction and a level-energy close to the conduction band, or an acceptor state, which corresponds to muonium at an interstitial site with a tightly bound electron and a hyperfine interaction close to that of free muonium. We show here that in CdS, CdSe and ZnO muonium preferentially forms a Donor state whereas the acceptor state is preferred in ZnS and ZnSe. In CdTe both states are observed, indicating that the level energies are similar.

  • probing the Shallow Donor muonium wave function in zno and cds via transferred hyperfine interactions
    Physica B-condensed Matter, 2001
    Co-Authors: J S Lord, S P Cottrell, P J C King, J M Gil, H V Alberto, R C Vilao, Piroto J Duarte, Ayres N De Campos, R L Lichti, S K L Sjue
    Abstract:

    Abstract The assignment of muon spin rotation spectra to muonium counterparts of hydrogen Shallow–Donor states is reviewed in four II–VI widegap semiconductors, CdS, CdSe, CdTe and ZnO. The existence of extended electronic orbitals is argued from the muon–electron hyperfine parameters and supported by the new muon spin repolarization data for CdS and ZnO, characterizing the superhyperfine parameters on the sparse Cd and Zn dipolar nuclei. The possibility of a more tightly bound electron occupying a compact orbital is reasonably excluded in these materials, contrasting with the muonium state in HgO.

  • Shallow Donor muonium states in ii vi semiconductor compounds
    Physical Review B, 2001
    Co-Authors: J M Gil, E A Davis, S P Cottrell, H V Alberto, R C Vilao, Piroto J Duarte, Ayres N De Campos, A Weidinger, J Krauser, S F J Cox
    Abstract:

    Experimental data on Shallow Donor muonium states in the II-VI semiconductor compounds CdS, CdSe, CdTe, and ZnO are presented. These are characterized by very weak hyperfine interactions amounting to approximately 10{sup -4} of the free-atom value, and by Donor levels with binding energies comparable to those calculated on the hydrogenic model of the Shallow centers. The data are discussed in terms of a model generalizing the knowledge of muonium and hydrogen states in tetrahedrally bonded semiconductors. Within this model the Shallow muonium state is attributed to muonium bound to the anion of the II-VI compound and located at the antibonding site or close to it in the bond direction.

R C Vilao - One of the best experts on this subject based on the ideXlab platform.

  • Shallow Donor state of hydrogen in in 2 o 3 and sno 2 implications for conductivity in transparent conducting oxides
    Physical Review B, 2009
    Co-Authors: P D C King, J M Gil, H V Alberto, R C Vilao, Piroto J Duarte, R L Lichti, Y G Celebi, Dj Payne, R G Egdell, Iain Mckenzie
    Abstract:

    Muonium, and by analogy hydrogen, is shown to form a Shallow-Donor state in In2O3 and SnO2. The paramagnetic charge state is stable below similar to 50 K in In2O3 and similar to 30 K in SnO2 which, coupled with its extremely small effective hyperfine splitting in both cases, allows its identification as the Shallow-Donor state. This has important implications for the controversial issue of the origins of conductivity in transparent conducting oxides.

  • Shallow Donor state of hydrogen in in 2 o 3 and sno 2 implications for conductivity in transparent conducting oxides
    Physical Review B, 2009
    Co-Authors: P D C King, J M Gil, H V Alberto, R C Vilao, Piroto J Duarte, R L Lichti, Y G Celebi, Dj Payne, R G Egdell, Iain Mckenzie
    Abstract:

    Muonium, and by analogy hydrogen, is shown to form a Shallow-Donor state in ${\text{In}}_{2}{\text{O}}_{3}$ and ${\text{SnO}}_{2}$. The paramagnetic charge state is stable below $\ensuremath{\sim}50\text{ }\text{K}$ in ${\text{In}}_{2}{\text{O}}_{3}$ and $\ensuremath{\sim}30\text{ }\text{K}$ in ${\text{SnO}}_{2}$ which, coupled with its extremely small effective hyperfine splitting in both cases, allows its identification as the Shallow-Donor state. This has important implications for the controversial issue of the origins of conductivity in transparent conducting oxides.

  • Shallow Donor versus deep acceptor state in ii vi semiconductor compounds
    Physica B-condensed Matter, 2003
    Co-Authors: A Weidinger, H V Alberto, R C Vilao, Piroto J Duarte, Ayres N De Campos
    Abstract:

    Abstract Information on the properties of the possible muonium states in II–VI semiconductor compounds is obtained in this study. In these materials, muonium may either form a Shallow Donor state, which is characterized by a small hyperfine interaction and a level-energy close to the conduction band, or an acceptor state, which corresponds to muonium at an interstitial site with a tightly bound electron and a hyperfine interaction close to that of free muonium. We show here that in CdS, CdSe and ZnO muonium preferentially forms a Donor state whereas the acceptor state is preferred in ZnS and ZnSe. In CdTe both states are observed, indicating that the level energies are similar.

  • probing the Shallow Donor muonium wave function in zno and cds via transferred hyperfine interactions
    Physica B-condensed Matter, 2001
    Co-Authors: J S Lord, S P Cottrell, P J C King, J M Gil, H V Alberto, R C Vilao, Piroto J Duarte, Ayres N De Campos, R L Lichti, S K L Sjue
    Abstract:

    Abstract The assignment of muon spin rotation spectra to muonium counterparts of hydrogen Shallow–Donor states is reviewed in four II–VI widegap semiconductors, CdS, CdSe, CdTe and ZnO. The existence of extended electronic orbitals is argued from the muon–electron hyperfine parameters and supported by the new muon spin repolarization data for CdS and ZnO, characterizing the superhyperfine parameters on the sparse Cd and Zn dipolar nuclei. The possibility of a more tightly bound electron occupying a compact orbital is reasonably excluded in these materials, contrasting with the muonium state in HgO.

  • Shallow Donor muonium states in ii vi semiconductor compounds
    Physical Review B, 2001
    Co-Authors: J M Gil, E A Davis, S P Cottrell, H V Alberto, R C Vilao, Piroto J Duarte, Ayres N De Campos, A Weidinger, J Krauser, S F J Cox
    Abstract:

    Experimental data on Shallow Donor muonium states in the II-VI semiconductor compounds CdS, CdSe, CdTe, and ZnO are presented. These are characterized by very weak hyperfine interactions amounting to approximately 10{sup -4} of the free-atom value, and by Donor levels with binding energies comparable to those calculated on the hydrogenic model of the Shallow centers. The data are discussed in terms of a model generalizing the knowledge of muonium and hydrogen states in tetrahedrally bonded semiconductors. Within this model the Shallow muonium state is attributed to muonium bound to the anion of the II-VI compound and located at the antibonding site or close to it in the bond direction.

Piroto J Duarte - One of the best experts on this subject based on the ideXlab platform.

  • Shallow Donor state of hydrogen in in 2 o 3 and sno 2 implications for conductivity in transparent conducting oxides
    Physical Review B, 2009
    Co-Authors: P D C King, J M Gil, H V Alberto, R C Vilao, Piroto J Duarte, R L Lichti, Y G Celebi, Dj Payne, R G Egdell, Iain Mckenzie
    Abstract:

    Muonium, and by analogy hydrogen, is shown to form a Shallow-Donor state in In2O3 and SnO2. The paramagnetic charge state is stable below similar to 50 K in In2O3 and similar to 30 K in SnO2 which, coupled with its extremely small effective hyperfine splitting in both cases, allows its identification as the Shallow-Donor state. This has important implications for the controversial issue of the origins of conductivity in transparent conducting oxides.

  • Shallow Donor state of hydrogen in in 2 o 3 and sno 2 implications for conductivity in transparent conducting oxides
    Physical Review B, 2009
    Co-Authors: P D C King, J M Gil, H V Alberto, R C Vilao, Piroto J Duarte, R L Lichti, Y G Celebi, Dj Payne, R G Egdell, Iain Mckenzie
    Abstract:

    Muonium, and by analogy hydrogen, is shown to form a Shallow-Donor state in ${\text{In}}_{2}{\text{O}}_{3}$ and ${\text{SnO}}_{2}$. The paramagnetic charge state is stable below $\ensuremath{\sim}50\text{ }\text{K}$ in ${\text{In}}_{2}{\text{O}}_{3}$ and $\ensuremath{\sim}30\text{ }\text{K}$ in ${\text{SnO}}_{2}$ which, coupled with its extremely small effective hyperfine splitting in both cases, allows its identification as the Shallow-Donor state. This has important implications for the controversial issue of the origins of conductivity in transparent conducting oxides.

  • Shallow Donor versus deep acceptor state in ii vi semiconductor compounds
    Physica B-condensed Matter, 2003
    Co-Authors: A Weidinger, H V Alberto, R C Vilao, Piroto J Duarte, Ayres N De Campos
    Abstract:

    Abstract Information on the properties of the possible muonium states in II–VI semiconductor compounds is obtained in this study. In these materials, muonium may either form a Shallow Donor state, which is characterized by a small hyperfine interaction and a level-energy close to the conduction band, or an acceptor state, which corresponds to muonium at an interstitial site with a tightly bound electron and a hyperfine interaction close to that of free muonium. We show here that in CdS, CdSe and ZnO muonium preferentially forms a Donor state whereas the acceptor state is preferred in ZnS and ZnSe. In CdTe both states are observed, indicating that the level energies are similar.

  • probing the Shallow Donor muonium wave function in zno and cds via transferred hyperfine interactions
    Physica B-condensed Matter, 2001
    Co-Authors: J S Lord, S P Cottrell, P J C King, J M Gil, H V Alberto, R C Vilao, Piroto J Duarte, Ayres N De Campos, R L Lichti, S K L Sjue
    Abstract:

    Abstract The assignment of muon spin rotation spectra to muonium counterparts of hydrogen Shallow–Donor states is reviewed in four II–VI widegap semiconductors, CdS, CdSe, CdTe and ZnO. The existence of extended electronic orbitals is argued from the muon–electron hyperfine parameters and supported by the new muon spin repolarization data for CdS and ZnO, characterizing the superhyperfine parameters on the sparse Cd and Zn dipolar nuclei. The possibility of a more tightly bound electron occupying a compact orbital is reasonably excluded in these materials, contrasting with the muonium state in HgO.

  • Shallow Donor muonium states in ii vi semiconductor compounds
    Physical Review B, 2001
    Co-Authors: J M Gil, E A Davis, S P Cottrell, H V Alberto, R C Vilao, Piroto J Duarte, Ayres N De Campos, A Weidinger, J Krauser, S F J Cox
    Abstract:

    Experimental data on Shallow Donor muonium states in the II-VI semiconductor compounds CdS, CdSe, CdTe, and ZnO are presented. These are characterized by very weak hyperfine interactions amounting to approximately 10{sup -4} of the free-atom value, and by Donor levels with binding energies comparable to those calculated on the hydrogenic model of the Shallow centers. The data are discussed in terms of a model generalizing the knowledge of muonium and hydrogen states in tetrahedrally bonded semiconductors. Within this model the Shallow muonium state is attributed to muonium bound to the anion of the II-VI compound and located at the antibonding site or close to it in the bond direction.

P D C King - One of the best experts on this subject based on the ideXlab platform.