메뉴 건너뛰기




Volumn 4, Issue , 2013, Pages

Heterointerface engineered electronic and magnetic phases of NdNiO 3 thin films

Author keywords

[No Author keywords available]

Indexed keywords

NICKEL COMPLEX;

EID: 84889243714     PISSN: None     EISSN: 20411723     Source Type: Journal    
DOI: 10.1038/ncomms3714     Document Type: Article
Times cited : (211)

References (58)
  • 2
    • 4243761984 scopus 로고
    • Band gaps and electronic structure of transition-metal compounds
    • Zaanen, J., Sawatzky, G. A. & Allen, J. W. Band gaps and electronic structure of transition-metal compounds. Phys. Rev. Lett. 55, 418-421 (1985
    • (1985) Phys. Rev. Lett , vol.55 , pp. 418-421
    • Zaanen, J.1    Sawatzky, G.A.2    Allen, J.W.3
  • 4
    • 77950281407 scopus 로고    scopus 로고
    • Oxide interfaces " An opportunity for electronics
    • Mannhart, J. & Schlom, D. G. Oxide interfaces " An opportunity for electronics. Science 327, 1607-1611 (2010
    • (2010) Science , vol.327 , pp. 1607-1611
    • Mannhart, J.1    Schlom, D.G.2
  • 5
    • 49149106980 scopus 로고    scopus 로고
    • Progress in perovskite nickelate research
    • Catalan, G. Progress in perovskite nickelate research. Phase Transit. 81, 729-749 (2008
    • (2008) Phase Transit , vol.81 , pp. 729-749
    • Catalan, G.1
  • 6
    • 0031072516 scopus 로고    scopus 로고
    • Magnetic and electronic properties of RNiO3 perovskites (R=rare earth
    • Medarde, M. L. Structural, magnetic and electronic properties of RNiO3 perovskites (R=rare earth J. Phys. Condens. Matter 9, 1679-1707 (1997
    • (1997) J. Phys. Condens Matter , vol.9 , pp. 1679-1707
    • Medarde, M.L.1
  • 7
    • 0001319414 scopus 로고
    • Origin of the band gap in the negative charge-transferenergy compound NaCuO2
    • Mizokawa, T. et al. Origin of the band gap in the negative charge-transferenergy compound NaCuO2. Phys. Rev. Lett. 67, 1638-1641 (1991
    • (1991) Phys. Rev. Lett , vol.67 , pp. 1638-1641
    • Mizokawa, T.1
  • 8
    • 0002274781 scopus 로고
    • Electronic structure of transition metal compounds: Photoemission experiments and model Hamiltonian calculations
    • Sarma, D. D. Electronic structure of transition metal compounds: photoemission experiments and model Hamiltonian calculations. J. Solid State Chem. 88, 45-52 (1990
    • (1990) J. Solid State Chem , vol.88 , pp. 45-52
    • Sarma, D.D.1
  • 9
    • 0141986320 scopus 로고    scopus 로고
    • Unusual valence, negative charge-transfer gaps and self-doping in transition-metal compound
    • Khomskii, D. I. Unusual valence, negative charge-transfer gaps and self-doping in transition-metal compound. Lith. Phys. J. 37, 65-72 (1997
    • (1997) Lith. Phys. J , vol.37 , pp. 65-72
    • Khomskii, D.I.1
  • 10
    • 0001357126 scopus 로고    scopus 로고
    • Spin and charge ordering in self-doped Mott insulators
    • Mizokawa, T., Khomskii, D. I. & Sawatzky, G. A. Spin and charge ordering in self-doped Mott insulators. Phys. Rev. B 61, 11263-11266 (2000
    • (2000) Phys. Rev , vol.61 , pp. 11263-11266
    • Mizokawa, T.1    Khomskii, D.I.2    Sawatzky, G.A.3
  • 11
    • 0001088066 scopus 로고    scopus 로고
    • Charge disproportionation in RNiO3 perovskites: Simultaneous metal-insulator and structural transition in YNiO3
    • Alonso, J. A. et al. Charge disproportionation in RNiO3 perovskites: simultaneous metal-insulator and structural transition in YNiO3. Phys. Rev. Lett. 82, 3871-3874 (1999
    • (1999) Phys. Rev. Lett , vol.82 , pp. 3871-3874
    • Alonso, J.A.1
  • 12
    • 0037171207 scopus 로고    scopus 로고
    • Direct observation of charge order in an epitaxial NdNiO3 film
    • Staub, U. et al. Direct observation of charge order in an epitaxial NdNiO3 film. Phys. Rev. Lett. 88, 126402 (2002
    • (2002) Phys. Rev. Lett , vol.88 , pp. 126402
    • Staub, U.1
  • 13
    • 0001063605 scopus 로고    scopus 로고
    • Covalent exchange vs superexchange in two nickel oxides
    • Goodenough, J. B. Covalent exchange vs superexchange in two nickel oxides. J. Solid State Chem. 127, 126-127 (1996
    • (1996) J. Solid State Chem , vol.127 , pp. 126-127
    • Goodenough, J.B.1
  • 14
    • 77953519140 scopus 로고    scopus 로고
    • Strain-mediated metal-insulator transition in epitaxial ultrathin films of NdNiO3
    • Jian, L. et al. Strain-mediated metal-insulator transition in epitaxial ultrathin films of NdNiO3. Appl. Phys. Lett. 96, 233110 (2010
    • (2010) Appl. Phys. Lett , vol.96 , pp. 233110
    • Jian, L.1
  • 15
    • 27744523003 scopus 로고    scopus 로고
    • Pressure-induced non-Fermi liquid behavior of PrNiO3
    • Zhou, J.-S., Goodenough, J. B. & Dabrowski, B. Pressure-induced non-Fermi liquid behavior of PrNiO3. Phys. Rev. Lett. 94, 226602 (2005
    • (2005) Phys. Rev. Lett , vol.94 , pp. 226602
    • Zhou, J.-S.1    Goodenough, J.B.2    Dabrowski, B.3
  • 16
    • 0025200242 scopus 로고
    • Comment on metal-insulator transition in amorphous Si1-xCrx
    • Mobius, A. Comment on metal-insulator transition in amorphous Si1-xCrx. Solid State Comm. 73, 215-219 (1990
    • (1990) Solid State Comm , vol.73 , pp. 215-219
    • Mobius, A.1
  • 17
    • 77949366361 scopus 로고    scopus 로고
    • Spin liquids in frustrated magnets
    • Balents, L. Spin liquids in frustrated magnets. Nature 464, 199-208 (2010
    • (2010) Nature , vol.464 , pp. 199-208
    • Balents, L.1
  • 18
    • 79960627574 scopus 로고    scopus 로고
    • Two-dimensional magnetic and superconducting phases in metal-insulator La2-xSrxCuO4 superlattices measured by muon-spin rotation
    • Suter, A. et al. Two-dimensional magnetic and superconducting phases in metal-insulator La2-xSrxCuO4 superlattices measured by muon-spin rotation. Phys. Rev. Lett. 106, 237003 (2011
    • (2011) Phys. Rev. Lett , vol.106 , pp. 237003
    • Suter, A.1
  • 20
    • 79952389049 scopus 로고    scopus 로고
    • Resistivity of a non-Galilean invariant fermi liquid near Pomeranchuk quantum criticality
    • Maslov, D. L., Yudson, V. I. & Chubukov, A. V. Resistivity of a non-Galilean invariant fermi liquid near Pomeranchuk quantum criticality. Phys. Rev. Lett. 106, 106403 (2011
    • (2011) Phys. Rev. Lett. 106 , pp. 106403
    • Maslov, D.L.1    Yudson, V.I.2    Chubukov, A.V.3
  • 21
    • 27144540436 scopus 로고    scopus 로고
    • General rules for predicting phase transitions in perovskites due to octahedral tilting
    • Angel, R. J., Zhao, J. & Ross, N. L. General rules for predicting phase transitions in perovskites due to octahedral tilting. Phys. Rev. Lett. 95, 025503 (2005
    • (2005) Phys. Rev. Lett , vol.95 , pp. 025503
    • Angel, R.J.1    Zhao, J.2    Ross, N.L.3
  • 22
    • 0001412142 scopus 로고
    • A comparative study of the crystallographic, magnetic and electrical properties of the Nd1-xLaxNiO3-d system
    • Blasco, J. & Garcia, J. A comparative study of the crystallographic, magnetic and electrical properties of the Nd1-xLaxNiO3-d system. J. Phys. Condens. Matter 6, 10759-10772 (1994
    • (1994) J. Phys. Condens. Matter , vol.6 , pp. 10759-10772
    • Blasco, J.1    Garcia, J.2
  • 23
    • 0031678346 scopus 로고    scopus 로고
    • Non-Fermi-liquid behaviour in magnetic d- and f-electron systems
    • Julian, S. R. et al. Non-Fermi-liquid behaviour in magnetic d- and f-electron systems. J. Magn. Magn. Mater. 177, 265-270 (1998
    • (1998) J. Magn. Magn. Mater , vol.177 , pp. 265-270
    • Julian, S.R.1
  • 24
    • 21844511190 scopus 로고
    • Anomalous properties around magnetic instability in heavy electron systems
    • Moriya, T. & Takimoto, T. Anomalous properties around magnetic instability in heavy electron systems. J. Phys. Soc. Jpn 64, 960-969 (1995
    • (1995) J. Phys. Soc. Jpn , vol.64 , pp. 960-969
    • Moriya, T.1    Takimoto, T.2
  • 25
    • 0000904487 scopus 로고    scopus 로고
    • Electronic excitation spectra from ab initio band-structure results for LaMO3 (M=CrMnFeCoNi)
    • Sarma, D. D., Shanthi, N. & Mahadevan, P. Electronic excitation spectra from ab initio band-structure results for LaMO3 (M=Cr,Mn,Fe,Co,Ni) Phys. Rev. B 54, 1622-1637 (1996
    • (1996) Phys. Rev B , vol.54 , pp. 1622-1637
    • Sarma, D.D.1    Shanthi, N.2    Mahadevan, P.3
  • 26
    • 0000627097 scopus 로고
    • RNiO3 perovskites (R=Pr,Nd): Nickel valence and the metal-insulator transition investigated by x-ray-absorption spectroscopy
    • Medarde, M. et al. RNiO3 perovskites (R=Pr,Nd): Nickel valence and the metal-insulator transition investigated by x-ray-absorption spectroscopy. Phys. Rev. B 46, 14975-14984 (1992
    • (1992) Phys. Rev , vol.46 , pp. 14975-14984
    • Medarde, M.1
  • 27
    • 4243608847 scopus 로고    scopus 로고
    • Site-specific X-ray absorption spectroscopy of Y1- xCaxBa2Cu3O7-y: Overdoping and role of apical oxygen for high temperature superconductivity
    • Merz, M. et al. Site-specific X-ray absorption spectroscopy of Y1- xCaxBa2Cu3O7-y: overdoping and role of apical oxygen for high temperature superconductivity. Phys. Rev. Lett. 80, 5192-5195 (1998
    • (1998) Phys. Rev. Lett , vol.80 , pp. 5192-5195
    • Merz, M.1
  • 28
    • 0000478137 scopus 로고
    • Charge-transfer gap and superexchange interaction in insulating cuprates
    • Ohta, Y., Tohyama, T. & Maekawa, S. Charge-transfer gap and superexchange interaction in insulating cuprates. Phys. Rev. Lett. 66, 1228-1231 (1991
    • (1991) Phys. Rev. Lett , vol.66 , pp. 1228-1231
    • Ohta, Y.1    Tohyama, T.2    Maekawa, S.3
  • 29
    • 0342398097 scopus 로고
    • Systematics in band gaps and optical spectra of 3D transition metal compounds
    • Zaanen, J. & Sawatzky, G. A. Systematics in band gaps and optical spectra of 3D transition metal compounds. J. Solid State Chem. 88, 8-27 (1990
    • (1990) J. Solid State Chem , vol.88 , pp. 8-27
    • Zaanen, J.1    Sawatzky, G.A.2
  • 30
    • 78651512171 scopus 로고    scopus 로고
    • Magnetic and electronic properties of RNiO3 (R=Pr, Nd, Eu, Ho and Y) perovskites studied by resonant soft X-ray magnetic powder diffraction
    • Bodenthin, Y. et al. Magnetic and electronic properties of RNiO3 (R=Pr, Nd, Eu, Ho and Y) perovskites studied by resonant soft X-ray magnetic powder diffraction. J. Phys. Condens. Matter. 23, 036002 (2011
    • (2011) J. Phys. Condens. Matter , vol.23 , pp. 036002
    • Bodenthin, Y.1
  • 31
    • 79961142423 scopus 로고    scopus 로고
    • Development of a compact fast CCD camera and resonant soft X-ray scattering endstation for time-resolved pump-probe experiments
    • Doering, D. et al. Development of a compact fast CCD camera and resonant soft X-ray scattering endstation for time-resolved pump-probe experiments. Rev. Sci. Instrum. 82, 073303 (2011
    • (2011) Rev. Sci. Instrum , vol.82 , pp. 073303
    • Doering, D.1
  • 32
    • 0037219815 scopus 로고    scopus 로고
    • Transition from Curie-Weiss to enhanced Pauli paramagnetism in RNiO3 (R=La,Pr,Gd)
    • Zhou, J.-S., Goodenough, J. B. & Dabrowski, B. Transition from Curie-Weiss to enhanced Pauli paramagnetism in RNiO3 (R=La,Pr,Gd) Phys. Rev. B 67, 020404 R (2003
    • (2003) Phys. Rev B , vol.67 , pp. 020404
    • Zhou, J.-S.1    Goodenough, J.B.2    Dabrowski, B.3
  • 33
    • 0001130730 scopus 로고    scopus 로고
    • High-temperature structural evolution of RNiO3 (R=Ho;Y; Er; Lu) perovskites: Charge disproportionation and electronic localization
    • Alonso, J. A. et al. High-temperature structural evolution of RNiO3 (R=Ho;Y; Er; Lu) perovskites: charge disproportionation and electronic localization. Phys. Rev. B 64, 094102 (2001
    • (2001) Phys. Rev , vol.64 , pp. 094102
    • Alonso, J.A.1
  • 34
    • 0006027128 scopus 로고    scopus 로고
    • Giant 16O-18O isotope effect on the metal-insulator transition of RNiO3 perovskites (R=rare earth)
    • Medarde, M., Lacorre, P., Conder, K., Fauth, F. & Furrer, A. Giant 16O-18O isotope effect on the metal-insulator transition of RNiO3 perovskites (R=rare earth) Phys. Rev. Lett. 80, 2397-2400 (1998
    • (1998) Phys. Rev. Lett , vol.80 , pp. 2397-2400
    • Medarde, M.1    Lacorre, P.2    Conder, K.3    Fauth, F.4    Furrer, A.5
  • 35
    • 0000546824 scopus 로고    scopus 로고
    • Probing the metal-insulator transition in Ni(III)-oxide perovskites
    • Zhou, J.-S., Goodenough, J. B., Dabrowski, B., Klamut, P. W. & Bukowski, Z. Probing the metal-insulator transition in Ni(III)-oxide perovskites. Phys. Rev. B 61, 4401-4404 (2000
    • (2000) Phys. Rev , vol.61 , pp. 4401-4404
    • Zhou, J.-S.1    Goodenough, J.B.2    Dabrowski, B.3    Klamut, P.W.4    Bukowski, Z.5
  • 36
    • 34247571513 scopus 로고    scopus 로고
    • Charge ordering as alternative to Jahn-Teller distortion
    • Mazin, I. et al. Charge ordering as alternative to Jahn-Teller distortion. Phys. Rev. Lett. 98, 176406-176409 (2007
    • (2007) Phys. Rev. Lett , vol.98 , pp. 176406-176409
    • Mazin, I.1
  • 38
    • 77957562660 scopus 로고    scopus 로고
    • Pressure dependence of metal-insulator transition in perovskites RNiO3 (R=Eu, Y, Lu
    • Cheng, J.-G., Zhou, J.-S., Goodenough, J. B., Alonso, J. A. & Martinez-Lope, M. J. Pressure dependence of metal-insulator transition in perovskites RNiO3 (R=Eu, Y, Lu Phys. Rev. B 82, 085107 (2010
    • (2010) Phys. Rev , vol.82 , pp. 085107
    • Cheng, J.-G.1    Zhou, J.-S.2    Goodenough, J.B.3    Alonso, J.A.4    Martinez-Lope, M.J.5
  • 39
    • 0040793613 scopus 로고
    • Disordered electronic systems
    • Lee, P. A. & Ramakrishnan, T. V. Disordered electronic systems. Rev. Mod. Phys. 57, 287-337 (1985
    • (1985) Rev. Mod. Phys , vol.57 , pp. 287-337
    • Lee, P.A.1    Ramakrishnan, T.V.2
  • 40
    • 25744460922 scopus 로고
    • Projector augmented-wave method
    • Blochl, P. E. Projector augmented-wave method. Phys. Rev. B 50, 17953-17979 (1994
    • (1994) Phys. Rev , vol.50 , pp. 17953-17979
    • Blochl, P.E.1
  • 41
    • 0030190741 scopus 로고    scopus 로고
    • Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set
    • Kresse, G. & Furthmller, J. Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set. Comput. Mater. Sci. 6, 15-50 (1996
    • (1996) Comput. Mater. Sci , vol.6 , pp. 15-50
    • Kresse, G.1    Furthmller, J.2
  • 42
    • 0011236321 scopus 로고    scopus 로고
    • From ultrasoft pseudopotentials to the projector augmented-wave method
    • Kresse, G. & Joubert, D. From ultrasoft pseudopotentials to the projector augmented-wave method. Phys. Rev. B 59, 1758-1775 (1999
    • (1999) Phys. Rev , vol.59 , pp. 1758-1775
    • Kresse, G.1    Joubert, D.2
  • 43
    • 4243943295 scopus 로고    scopus 로고
    • Generalized gradient approximation made simple
    • Perdew, J. P., Burke, K. & Ernzerhof, M. Generalized gradient approximation made simple. Phys. Rev. Lett. 77, 3865-3868 (1996
    • (1996) Phys. Rev. Lett , vol.77 , pp. 3865-3868
    • Perdew, J.P.1    Burke, K.2    Ernzerhof, M.3
  • 44
    • 0012842779 scopus 로고    scopus 로고
    • First-principles calculations of the electronic structure and spectra of strongly correlated systems: The LDA+U method
    • Anisimov, V. I., Aryasetiawan, F. & Lichtenstein, A. I. First-principles calculations of the electronic structure and spectra of strongly correlated systems: the LDA+U method. J. Phys. Condens. Matter 9, 767-808 (1997
    • (1997) J. Phys. Condens. Matter , vol.9 , pp. 767-808
    • Anisimov, V.I.1    Aryasetiawan, F.2    Lichtenstein, A.I.3
  • 45
    • 0001486791 scopus 로고    scopus 로고
    • Electron-energy-loss spectra and the structural stability of nickel oxide: An LSDA+U study
    • Dudarev, S. L., Botton, G. A., Savrasov, S. Y., Humphreys, C. J. & Sutton, A. P. Electron-energy-loss spectra and the structural stability of nickel oxide: an LSDA+U study. Phys. Rev. B 57, 1505-1509 (1998
    • (1998) Phys. Rev , vol.57 , pp. 1505-1509
    • Dudarev, S.L.1    Botton, G.A.2    Savrasov, S.Y.3    Humphreys, C.J.4    Sutton, A.P.5
  • 46
    • 84863319054 scopus 로고    scopus 로고
    • Ab initio study of the factors affecting the ground state of rare-earth nickelates
    • Prosandeev, S., Bellaiche, L. & Iniguez, J. Ab initio study of the factors affecting the ground state of rare-earth nickelates. Phys. Rev. B 85, 214431 (2012
    • (2012) Phys. Rev , vol.85 , pp. 214431
    • Prosandeev, S.1    Bellaiche, L.2    Iniguez, J.3
  • 47
    • 30244571056 scopus 로고
    • Calculated electronic structure of the sandwich d1 metals LaI2 and CeI2: Application of new LMTO techniques
    • Jepsen & Andersen, O. Calculated electronic structure of the sandwich d1 metals LaI2 and CeI2: application of new LMTO techniques. Zeitschrift Phys. 97, 35-47 (1995
    • (1995) Zeitschrift Phys , vol.97 , pp. 35-47
    • Andersen, O.1
  • 48
    • 55249106457 scopus 로고    scopus 로고
    • Marginal breakdown of the Fermi-liquid state on the border of metallic ferromagnetism
    • Smith, R. P. et al. Marginal breakdown of the Fermi-liquid state on the border of metallic ferromagnetism. Nature 455, 1220-1223 (2008
    • (2008) Nature , vol.455 , pp. 1220-1223
    • Smith, R.P.1
  • 50
    • 80052769538 scopus 로고    scopus 로고
    • Asymmetric orbital-lattice interactions in ultrathin correlated oxide films
    • Chakhalian, J. et al. Asymmetric orbital-lattice interactions in ultrathin correlated oxide films. Phys. Rev. Lett. 107, 116805 (2011
    • (2011) Phys. Rev. Lett , vol.107 , pp. 116805
    • Chakhalian, J.1
  • 51
    • 0027592522 scopus 로고
    • Frustrated electronic phase separation and hightemperature superconductors
    • Emery, V. & Kivelson, S. Frustrated electronic phase separation and hightemperature superconductors. Phys. C Superconductivity 209, 597-621 (1993
    • (1993) Phys. C Superconductivity , vol.209 , pp. 597-621
    • Emery, V.1    Kivelson, S.2
  • 52
    • 3342967482 scopus 로고
    • Singular quasiparticle scattering in the proximity of charge instabilities
    • Castellani, C., Di Castro, C. & Grilli, M. Singular quasiparticle scattering in the proximity of charge instabilities. Phys. Rev. Lett. 75, 4650-4653 (1995
    • (1995) Phys. Rev. Lett , vol.75 , pp. 4650-4653
    • Castellani, C.1    Di Castro, C.2    Grilli, M.3
  • 53
    • 0141944175 scopus 로고
    • Phase separation, charge-transfer instability, and superconductivity in the three-band extended hubbard model: Weak-coupling theory
    • Bang, Y., Kotliar, G., Castellani, C., Grilli, M. & Raimondi, R. Phase separation, charge-transfer instability, and superconductivity in the three-band extended hubbard model: Weak-coupling theory. Phys. Rev. B 43, 13724-13727 (1991
    • (1991) Phys. Rev , vol.43 , pp. 13724-13727
    • Bang, Y.1    Kotliar, G.2    Castellani, C.3    Grilli, M.4    Raimondi, R.5
  • 54
    • 0001954726 scopus 로고
    • Charge collective modes and dynamic pairing in the three-band Hubbard model. II. Strongcoupling limit
    • Raimondi, R., Castellani, C., Grilli, M., Bang, Y. & Kotliar, G. Charge collective modes and dynamic pairing in the three-band Hubbard model. II. Strongcoupling limit. Phys. Rev. B 47, 3331-3346 (1993
    • (1993) Phys. Rev , vol.47 , pp. 3331-3346
    • Raimondi, R.1    Castellani, C.2    Grilli, M.3    Bang, Y.4    Kotliar, G.5
  • 55
    • 0001741707 scopus 로고
    • Electron-phonon interactions in the presence of strong correlations
    • Grilli, M. & Castellani, C. Electron-phonon interactions in the presence of strong correlations. Phys. Rev. B 50, 16880-16898 (1994
    • (1994) Phys. Rev. B , vol.50 , pp. 16880-16898
    • Grilli, M.1    Castellani, C.2
  • 56
    • 0001501595 scopus 로고    scopus 로고
    • Charge-density waves and superconductivity as an alternative to phase separation in the infinite-U Hubbard-Holstein model
    • Becca, F., Tarquini, M., Grilli, M. & Di Castro, C. Charge-density waves and superconductivity as an alternative to phase separation in the infinite-U Hubbard-Holstein model. Phys. Rev. B 54, 12443-12457 (1996
    • (1996) Phys. Rev. B , vol.54 , pp. 12443-12457
    • Becca, F.1    Tarquini, M.2    Grilli, M.3    Di Castro, C.4
  • 57
    • 84889253729 scopus 로고    scopus 로고
    • Data-Sheets http://www.crystec.de/datasheets-e.html (2013
    • (2013) Data-Sheets
  • 58
    • 0031547414 scopus 로고    scopus 로고
    • Growth conditions and composition of SrPrGaO4 single crystals
    • Uecker, R. et al. Growth conditions and composition of SrPrGaO4 single crystals. J. Cryst. Growth 174, 320-323 (1997
    • (1997) J. Cryst. Growth , vol.174 , pp. 320-323
    • Uecker, R.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.