• 3678 引用
  • 35 h指数
1987 …2019
Pureに変更を加えた場合、すぐここに表示されます。

研究成果 1987 2019

2019

Magnetic study of the lower critical field of organic superconductor λ-(Bets)2gacl4

Sari, D. P., Hiraki, K. I., Nakano, T., Hagiwara, M., Nozue, Y., Kusakawa, T., Hori, A., Yamamoto, A., Watanabe, I. & Ishii, Y., 2019 1 1, Functional Properties of Modern Materials II. Kurniawan, B., Nugroho, A. A., Darminto, Watanabe, I. & Risdiana (版). Trans Tech Publications Ltd, p. 296-301 6 p. (Materials Science Forum; 巻数 966 MSF).

研究成果: Conference contribution

Demagnetization
organic superconductors
Magnetic variables measurement
Needles
Superconducting materials
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

Cu hyperfine coupling constants of HgBa2CaCu2O6+δ

Itoh, Y., MacHi, T. & Yamamoto, A., 2018 7 26, : : Journal of Physics: Conference Series. 1054, 1, 012006.

研究成果: Conference article

nuclear spin
spin-lattice relaxation
echoes
anomalies
nuclear magnetic resonance
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)
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
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
2014
Mercury (metal)
Mercury
Oxides
Transition metals
metal oxides
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
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

Erratum: Metal-insulator transition in a pyrochlore-type ruthenium oxide, Hg 2Ru 2O 7 (Journal of the Physical Society of Japan (2007) 76, (043703))

Yamamoto, A., Sharma, P. A., Okamoto, Y., Nakao, A., Katori, H. A., Niitaka, S., Hashizume, D. & Takagi, H., 2007 7, : : Journal of the Physical Society of Japan. 76, 7, 078002.

研究成果: Comment/debate

ruthenium
Japan
insulators
oxides
metals
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)
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
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, Perera, R. C. C., 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)
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)
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
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