年単位の研究成果
研究成果 1987 2019
- 1 - 50 / 169 件中
- 出版年、タイトル (降順)
2018
1
引用
(Scopus)
Charge dynamics and metal-insulator transition in perovskite SrIr1−xSnxO3
Fujioka, J., Okawa, T., Masuko, M., Yamamoto, A. & Tokura, Y., 2018 1 1, : : Journal of the Physical Society of Japan. 87, 12, 123706.研究成果: Article
insulators
orbitals
metals
metalloids
substitutes
2017
17
引用
(Scopus)
Correlated Dirac semimetallic state with unusual positive magnetoresistance in strain-free perovskite SrIrO3
Fujioka, J., Okawa, T., Yamamoto, A. & Tokura, Y., 2017 3 3, : : Physical Review B. 95, 12, 121102.研究成果: Article
magnetoresistivity
Magnetoresistance
Perovskite
Paramagnetism
Galvanomagnetic effects
3
引用
(Scopus)
Evidence for Weakly Correlated Oxygen Holes in the Highest- Tc Cuprate Superconductor HgBa2Ca2Cu3 O8+δ
Chainani, A., Sicot, M., Fagot-Revurat, Y., Vasseur, G., Granet, J., Kierren, B., Moreau, L., Oura, M., Yamamoto, A., Tokura, Y. & Malterre, D., 2017 7 31, : : Physical Review Letters. 119, 5, 057001.研究成果: Article
cuprates
photoelectric emission
x ray absorption
x ray spectroscopy
absorption spectroscopy
1
引用
(Scopus)
Magnetic susceptibility of optimally doped HgBa2CuO4+δ
Itoh, Y., Machi, T. & Yamamoto, A., 2017 12 13, : : Physical Review B. 96, 23, 235118.研究成果: Article
Magnetic susceptibility
Powders
Superconducting materials
Charge transfer
rocks
4
引用
(Scopus)
S= 12 quantum critical spin ladders produced by orbital ordering in Ba2CuTeO6
Gibbs, A. S., Yamamoto, A., Yaresko, A. N., Knight, K. S., Yasuoka, H., Majumder, M., Baenitz, M., Saines, P. J., Hester, J. R., Hashizume, D., Kondo, A., Kindo, K. & Takagi, H., 2017 3 21, : : Physical Review B. 95, 10, 104428.研究成果: Article
Ladders
ladders
orbitals
Exchange coupling
Neutron diffraction
6
引用
(Scopus)
Ultraslow fluctuations in the pseudogap states of HgBa2CaCu2 O6+δ
Itoh, Y., Machi, T. & Yamamoto, A., 2017 3 6, : : Physical Review B - Condensed Matter and Materials Physics. 95, 9, 094501.研究成果: Article
Exponential functions
exponential functions
nuclear spin
cuprates
echoes
2015
2
引用
(Scopus)
Coexistence of monochalocogen and dichalocogen ions in BiSe2 and BiS2 crystals prepared at high pressure
Yamamoto, A., Hashizume, D., Bahramy, M. S. & Tokura, Y., 2015 4 20, : : Inorganic Chemistry. 54, 8, p. 4114-4119 6 p.研究成果: Article
Ions
Crystals
crystals
ions
Substitution reactions
16
引用
(Scopus)
High pressure effects revisited for the cuprate superconductor family with highest critical temperature
Yamamoto, A., Takeshita, N., Terakura, C. & Tokura, Y., 2015 12 1, : : Nature Communications. 6, 8990.研究成果: Article
High pressure effects
pressure effects
cuprates
critical temperature
electrical resistivity
9
引用
(Scopus)
Thermal conductivity across the metal-insulator transition in the single-crystalline hyperkagome antiferromagnet Na3+xIr3 O8
Fauqué, B., Xu, X., Bangura, A. F., Hunter, E. C., Yamamoto, A., Behnia, K., Carrington, A., Takagi, H., Hussey, N. E. & Perry, R. S., 2015 2 25, : : Physical Review B - Condensed Matter and Materials Physics. 91, 7, 075129.研究成果: Article
Metal insulator transition
Thermal conductivity
thermal conductivity
insulators
Scattering
2013
2
引用
(Scopus)
Quantifying covalency and metallicity in correlated compounds undergoing metal-insulator transitions
Chainani, A., Yamamoto, A., Matsunami, M., Eguchi, R., Taguchi, M., Takata, Y., Takagi, H., Shin, S., Nishino, Y., Yabashi, M., Tamasaku, K. & Ishikawa, T., 2013 1 9, : : Physical Review B - Condensed Matter and Materials Physics. 87, 4, 045108.研究成果: Article
Metal insulator transition
metal compounds
metallicity
insulators
Screening
36
引用
(Scopus)
Zero resistivity above 150K in HgBa2Ca2Cu 3O8+δ at high pressure
Takeshita, N., Yamamoto, A., Iyo, A. & Eisaki, H., 2013 2, : : Journal of the Physical Society of Japan. 82, 2, 023711.研究成果: Article
electrical resistivity
hydrostatic pressure
superconductivity
transition temperature
signatures
2012
55
引用
(Scopus)
Strong coupling superconductivity at 8.4 K in an antiperovskite phosphide SrPt 3P
Takayama, T., Kuwano, K., Hirai, D., Katsura, Y., Yamamoto, A. & Takagi, H., 2012 6 8, : : Physical Review Letters. 108, 23, 237001.研究成果: Article
phosphides
phonons
superconductivity
heavy fermion superconductors
Fermi surfaces
2011
Metal-Insulator Transition and Magnetic Order in the Pyrochlore Oxide Hg2Ru2O7
Yamamoto, A., Yoshida, M. & Takigawa, M., 2011, : : Journal of the Physical Society of Japan.研究成果: Article
5
引用
(Scopus)
Superconducting Phase at 7.7 K in the HgxReO3 Compound with a Hexagonal Bronze Structure
Ohgushi, K., Yamamoto, A., Kiuchi, Y., Ganguli, C., Matsubayashi, K., Uwatoko, Y. & Takagi, H., 2011 1 4, : : Physical Review Letters. 106, 1, 017001.研究成果: Article
bronzes
superconductivity
rhenium
phonons
transition temperature
2010
8
引用
(Scopus)
Magnetic ground state of pyrochlore oxides close to metal-insulator boundary probed by muon spin rotation
Miyazaki, M., Kadono, R., Satoh, K. H., Hiraishi, M., Takeshita, S., Koda, A., Yamamoto, A. & Takagi, H., 2010 9 8, : : Physical Review B - Condensed Matter and Materials Physics. 82, 9, 094413.研究成果: Article
Metal insulator boundaries
muon spin rotation
Metal insulator transition
Magnetism
Oxides
1
引用
(Scopus)
On the possibility of MgB2-like superconductivity in potassium hexaboride
Katsura, Y., Yamamoto, A., Ogino, H., Horii, S., Shimoyama, J. I., Kishio, K. & Takagi, H., 2010 12, : : Physica C: Superconductivity and its Applications. 470, SUPPL.1研究成果: Article
Superconductivity
Potassium
potassium
superconductivity
Boron
18
引用
(Scopus)
Superconductivity in 4d and 5d transition metal layered pnictides BaRh 2P2, BaIr2P2 and SrIr 2As2
Hirai, D., Takayama, T., Hashizume, D., Higashinaka, R., Yamamoto, A., Hiroko, A. K. & Takagi, H., 2010 12, : : Physica C: Superconductivity and its Applications. 470, SUPPL.1研究成果: Article
Group 5A compounds
Superconductivity
Transition metals
superconductivity
transition metals
6
引用
(Scopus)
Ten layered hexagonal perovskite Sr5Ru5-xO 15 (x = 0.90), a weak ferromagnet with a giant coercive field H c ∼ 12 T
Yamamoto, A., Hashizume, D., Katori, H. A., Sasaki, T., Ohmichi, E., Nishizaki, T., Kobayashi, N. & Takagi, H., 2010 10 26, : : Chemistry of Materials. 22, 20, p. 5712-5717 6 p.研究成果: Article
Coercive force
Perovskite
Ferromagnetic materials
Ferromagnetism
Curie temperature
2007
43
引用
(Scopus)
Fermi level shift in la1-xSrxMO3 (M=Mn, Fe, Co, and Ni) probed by Schottky-like heteroepitaxial junctions with SrTi 0.99Nb0.01O3
Sawa, A., Yamamoto, A., Yamada, H., Fujii, T., Kawasaki, M., Matsuno, J. & Tokura, Y., 2007 8 2, : : Applied Physics Letters. 90, 25, 252102.研究成果: Article
shift
n-type semiconductors
metal oxides
transition metals
electrical properties
32
引用
(Scopus)
Metal-insulator transition in a pyrochlore-type ruthenium oxide, Hg 2Ru2O7
Yamamoto, A., Sharma, P. A., Okamoto, Y., Nakao, A., Aruga Katori, H., Niitaka, S., Hashizume, D. & Takagi, H., 2007 4, : : Journal of the Physical Society of Japan. 76, 4, 043703.研究成果: Article
ruthenium
insulators
oxides
metals
valence
9
引用
(Scopus)
Pressure-induced transition from a correlated insulator to a fermi liquid observed in geometrically frustrated Hg 2Ru 2O 7 pyrochlore
Takeshita, N., Terakura, C., Tokura, Y., Yamamoto, A. & Takagi, H., 2007 6, : : Journal of the Physical Society of Japan. 76, 6, 063707.研究成果: Article
Fermi liquids
insulators
metals
elementary excitations
hydrostatic pressure
2006
Phonon softening in HgBa2CuO4+δ and MgB 2
Uchiyama, H., Baron, A. Q. R., Tsutsui, S., Tanaka, Y., Ishikawa, D., Lee, S., Hu, W. Z., Yamamoto, A., Heid, R., Bohnen, K. P., Ishikawa, T., Tajima, S. & Endoh, Y., 2006 1, : : Journal of Physics and Chemistry of Solids. 67, 1-3, p. 294-297 4 p.研究成果: Article
softening
Superconducting materials
Inelastic scattering
Superconductivity
X ray scattering
2005
7
引用
(Scopus)
Effects of carbon incorporation on doping state of YBa2Cu 3Oy
Yamamoto, A., Hirose, K., Itoh, Y., Kakeshita, T. & Tajima, S., 2005 5 1, : : Physica C: Superconductivity and its Applications. 421, 1-4, p. 1-9 9 p.研究成果: Article
Carbon
Doping (additives)
Oxygen
carbon
oxygen
Erratum: Effects of carbon incorporation on doping state of YBa 2Cu3Oy (Physica C: Superconductivity and its Applications (2005) 421 (1-9) DOI: 10.1016/j.physc.2005.02.006)
Yamamoto, A., Hirose, K., Itoh, Y., Kakeshita, T. & Tajima, S., 2005 11 15, : : Physica C: Superconductivity and its Applications. 432, 3-4, p. 315 1 p.研究成果: Article
Superconductivity
Carbon
superconductivity
Doping (additives)
carbon
2004
24
引用
(Scopus)
Carbon-substitution effect on superconducting properties in MgB2 single crystals
Masui, T., Lee, S., Yamamoto, A., Uchiyama, H. & Tajima, S., 2004 10, : : Physica C: Superconductivity and its Applications. 412-414, SPEC. ISS., p. 303-306 4 p.研究成果: Article
Substitution reactions
Carbon
Single crystals
substitutes
carbon
60
引用
(Scopus)
Crystal growth of C-doped MgB2 superconductors: Accidental doping and inhomogeneity
Lee, S., Masui, T., Yamamoto, A., Uchiyama, H. & Tajima, S., 2004 10, : : Physica C: Superconductivity and its Applications. 412-414, SPEC. ISS., p. 31-35 5 p.研究成果: Article
Crystallization
Crystal growth
Superconducting materials
crystal growth
inhomogeneity
6
引用
(Scopus)
Metallization of La1/3NbO3 by lithium incorporation
Yamamoto, A., Uchiyama, H. & Tajima, S., 2004 9 1, : : Materials Research Bulletin. 39, 11, p. 1691-1699 9 p.研究成果: Article
Metallizing
Lithium
Transport properties
lithium
transport properties
Phonon softening in HgBa2CuO4+δ observed by inelastic X-ray scattering
Uchiyama, H., Baron, A. Q. R., Tsutsui, S., Tanaka, Y., Hu, W. Z., Yamamoto, A., Tajima, S. & Endoh, Y., 2004 12 1, : : Physica Status Solidi C: Conferences. 1, 11, p. 3130-3133 4 p.研究成果: Article
softening
cuprates
scattering
x rays
transition temperature
61
引用
(Scopus)
Softening of Cu-O bond stretching phonons in tetragonal HgBa 2CuO4+δ
Uchiyama, H., Baron, A. Q. R., Tsutsui, S., Tanaka, Y., Hu, W. Z., Yamamoto, A., Tajima, S. & Endoh, Y., 2004 5 14, : : Physical Review Letters. 92, 19, p. 197005-197001 5 p.研究成果: Article
softening
phonons
x ray scattering
analyzers
crystallinity
2003
6
引用
(Scopus)
A Raman scattering study of superconductivity in MgB2
Quilty, J. W., Lee, S., Yamamoto, A., Tajima, S. & Yamanaka, A., 2003 5, : : Physica C: Superconductivity and its Applications. 388-389, p. 131-132 2 p.研究成果: Article
Superconductivity
Raman scattering
superconductivity
Scattering
Polarization
200
引用
(Scopus)
Carbon-substituted MgB2 single crystals
Lee, S., Masui, T., Yamamoto, A., Uchiyama, H. & Tajima, S., 2003 10 1, : : Physica C: Superconductivity and its Applications. 397, 1-2, p. 7-13 7 p.研究成果: Article
Carbon
Single crystals
Crystals
electrical resistivity
carbon
32
引用
(Scopus)
Crystal growth and characterization of MgB2: The relation between structural and superconducting properties
Lee, S., Masui, T., Mori, H., Eltsev, Y., Yamamoto, A. & Tajima, S., 2003 2, : : Superconductor Science and Technology. 16, 2, p. 213-220 8 p.研究成果: Article
Crystallization
Crystal growth
crystal growth
Temperature
De Haas-van Alphen effect in single crystal MgB2
Carrington, A., Cooper, J. R., Hussey, N. E., Meeson, P. J., Yelland, E. A., Lee, S., Yamamoto, A. & Tajima, S., 2003 5, : : Physica C: Superconductivity and its Applications. 388-389, p. 105-106 2 p.研究成果: Article
Orbits
Single crystals
orbits
single crystals
elementary excitations
Determination of the Fermi Surface of [Formula presented] by the de Haas–van Alphen Effect
Carrington, A., Meeson, P. J., Cooper, J. R., Balicas, L., Hussey, N. E., Yelland, E. A., Lee, S., Yamamoto, A., Tajima, S., Kazakov, S. M. & Karpinski, J., 2003 7 17, : : Physical Review Letters. 91, 3研究成果: Article
Fermi surfaces
orbits
electrons
electronic structure
augmentation
59
引用
(Scopus)
Determination of the Fermi surface of MgB2 by the de Haas-van Alphen effect
Carrington, A., Meeson, P. J., Cooper, J. R., Balicas, L., Hussey, N. E., Yelland, E. A., Lee, S., Yamamoto, A., Tajima, S., Kazakov, S. M. & Karpinski, J., 2003 7 18, : : Physical Review Letters. 91, 3研究成果: Article
Fermi surfaces
electron phonon interactions
topology
electronic structure
orbits
19
引用
(Scopus)
Effect of heavy-ion irradiation on the pinning properties of MgB2
Chikumoto, N., Yamamoto, A., Konczykowski, M. & Murakami, M., 2003 5, : : Physica C: Superconductivity and its Applications. 388-389, p. 167-168 2 p.研究成果: Article
Heavy Ions
Ion bombardment
ion irradiation
Heavy ions
heavy ions
15
引用
(Scopus)
Electronic structure of B 2pσ and pπ states in MgB2, AlB2, and ZrB2 single crystals
Nakamura, J., Nasubida, S. Y., Kabasawa, E., Yamazaki, H., Yamada, N., Kuroki, K., Watanabe, M., Oguchi, T., Lee, S., Yamamoto, A., Tajima, S., Umeda, Y., Minakawa, S., Kimura, N., Aoki, H., Otani, S., Shin, S., Callcott, T. A., Ederer, D. L., Denlinger, J. D. および1人, , 2003 8, : : Physical Review B - Condensed Matter and Materials Physics. 68, 6, p. 645151-645155 5 p., 064515.研究成果: Article
Electron correlations
Electronic structure
Single crystals
electronic structure
single crystals
5
引用
(Scopus)
Experimental study of electron-phonon interaction in MgB2
Tajima, S., Masui, T., Quilty, J., Lee, S., Yamamoto, A. & Yamanaka, A., 2003 5, : : Physica C: Superconductivity and its Applications. 388-389, p. 103-104 2 p.研究成果: Article
Electron-phonon interactions
electron phonon interactions
Superconductivity
Raman scattering
Boron
25
引用
(Scopus)
Features of the electron density in magnesium diboride: Reconstruction from X-ray diffraction data and comparison with TB-LMTO and FPLO calculations
Tsirelson, V., Stash, A., Kohout, M., Rosner, H., Mori, H., Sato, S., Lee, S., Yamamoto, A., Tajima, S. & Grin, Y., 2003 10 1, : : Acta Crystallographica Section B: Structural Science. 59, 5, p. 575-583 9 p.研究成果: Article
Orbital calculations
Tin
Carrier concentration
X ray diffraction
Atoms
2002
7
引用
(Scopus)
Crystal growth of Bi2Sr2Ca2Cu3O10+x and (Bi,Pb)2Sr2Ca2Cu3O10+x by the KCl flux method
Lee, S., Yamamoto, A. & Tajima, S., 2002 9, : : Journal of Materials Research. 17, 9, p. 2286-2293 8 p.研究成果: Article
Crystallization
Crystal growth
crystal growth
Fluxes
Crystals
6
引用
(Scopus)
De Haas–van Alphen Effect in Single Crystal [Formula presented]
Yelland, E. A., Cooper, J. R., Carrington, A., Hussey, N. E., Meeson, P. J., Lee, S., Yamamoto, A. & Tajima, S., 2002 1 1, : : Physical Review Letters. 88, 21, 1 p.研究成果: Article
single crystals
tubes
orbits
high temperature superconductors
Fermi surfaces
107
引用
(Scopus)
de Haas-van Alphen effect in single crystal MgB2
Yelland, E. A., Cooper, J. R., Carrington, A., Hussey, N. E., Meeson, P. J., Lee, S., Yamamoto, A. & Tajima, S., 2002 5 27, : : Physical Review Letters. 88, 21, p. 2170021-2170024 4 p.研究成果: Article
single crystals
electron tubes
tubes
orbits
high temperature superconductors
1
引用
(Scopus)
Effects of Zn substitution on the superconductivity and pseudogap in (formula presented) with various doping levels
Yamamoto, A., Minami, K., Hu, W. Z., Miyakita, A., Izumi, M. & Tajima, S., 2002 1 1, : : Physical Review B - Condensed Matter and Materials Physics. 65, 10, p. 1-7 7 p.研究成果: Article
Superconductivity
Substitution reactions
superconductivity
Doping (additives)
substitutes
33
引用
(Scopus)
Effects of Zn substitution on the superconductivity and pseudogap in HgBa2CuO4+δ with various doping levels
Yamamoto, A., Minami, K., Hu, W. Z., Miyakita, A., Izumi, M. & Tajima, S., 2002 3 1, : : Physical Review B - Condensed Matter and Materials Physics. 65, 10, p. 1045051-1045057 7 p., 104505.研究成果: Article
Superconductivity
Substitution reactions
superconductivity
Doping (additives)
substitutes
Electron density distribution in a single crystal of (formula presented) (formula presented)
Mori, H., Lee, S., Yamamoto, A., Tajima, S. & Sato, S., 2002 1 1, : : Physical Review B - Condensed Matter and Materials Physics. 65, 9, p. 1-4 4 p.研究成果: Article
Electronic density of states
density distribution
Single crystals
Atoms
single crystals
32
引用
(Scopus)
Electron density distribution in a single crystal of Mg1-xB2 [x=0.045(5)]
Mori, H., Lee, S., Yamamoto, A., Tajima, S. & Sato, S., 2002 3 1, : : Physical Review B - Condensed Matter and Materials Physics. 65, 9, p. 925071-925074 4 p., 092507.研究成果: Article
Electronic density of states
density distribution
Single crystals
Atoms
single crystals
5
引用
(Scopus)
Electronic state of MgB2 superconductor
Tajima, S., Masui, T., Uchiyama, H., Quilty, J. W., Eltsev, Y., Lee, S., Yamamoto, A. & Mori, H., 2002 8, : : Current Applied Physics. 2, 4, p. 315-319 5 p.研究成果: Article
Boron
Electronic states
Superconducting materials
Raman scattering
Photoelectron spectroscopy
6
引用
(Scopus)
Exponential Temperature Dependence of the Penetration Depth in Single Crystal [Formula presented]
Manzano, F., Carrington, A., Hussey, N. E., Lee, S., Yamamoto, A. & Tajima, S., 2002 1 1, : : Physical Review Letters. 88, 4, 1 p.研究成果: Article
penetration
temperature dependence
single crystals
radio frequencies
high resolution
149
引用
(Scopus)
Exponential temperature dependence of the penetration depth in single crystal MgB2
Manzano, F., Carrington, A., Hussey, N. E., Lee, S., Yamamoto, A. & Tajima, S., 2002 1 28, : : Physical Review Letters. 88, 4, p. 470021-470024 4 p., 047002.研究成果: Article
penetration
temperature dependence
single crystals
radio frequencies
high resolution
71
引用
(Scopus)
High-pressure synthesis of superconducting Nb1-xB2 (x = 0-0.48) with the maximum Tc = 9.2 K
Yamamoto, A., Takao, C., Masui, T., Izumi, M. & Tajima, S., 2002 12 15, : : Physica C: Superconductivity and its Applications. 383, 3, p. 197-206 10 p.研究成果: Article
Superconductivity
superconductivity
synthesis
Special effects
Superconducting transition temperature