T. Sasaki

activity

20012021

most citedStrongly correlated superconductivity in a copper-based metal-organic framework with a perfect kagome lattice

101 citations · 780 across the 36 of their papers we have counts for

collaborators

Showing cond-mat.supr-conShow all

18 papers · 1 filter

cond-mat.supr-con2021★ 9 cited

Pairing interaction in superconducting UCoGe tunable by magnetic field

K. Ishida, S. Matsuzaki, M. Manago +5

The mechanism of unconventional superconductivity, such as high-temperature-cuprate, Fe-based, and heavy-fermion superconductors, has been studied as a central issue in condensed-m…

cond-mat.supr-con2012★ 29 cited

Two-band superconductivity featuring different anisotropies in the ternary iron silicide Lu $_{2}$ Fe $_{3}$ Si $_{5}$

Y. Nakajima, H. Hidaka, T. Nakagawa +4

We report detailed studies of the upper critical field and low-temperature specific heat in the two-gap superconductor Lu $_{2}$ Fe $_{3}$ Si $_{5}$ . The anisotropy of the upper critica…

cond-mat.supr-con2008★ 14 cited

Mott transition and superconductivity in the strongly correlated organic superconductor $κ$ -(BEDT-TTF) $_{2}$ Cu[N(CN) $_{2}]$ Br

T. Sasaki, N. Yoneyama, N. Kobayashi

The magnetic field effect on the phase diagram of the organic Mott system $κ$ -(BEDT-TTF) $_{2}$ Cu[N(CN) $_{2}$ ]Br in which the bandwidth was tuned by the substitution of deuterated m…

cond-mat.supr-con2006★ 5 cited

Magnetic-field effects on the charge-spin stripe order in La-214 high-Tc cuprates

T. Adachi, K. Omori, T. Kawamata +4

Magnetic-field effects on the charge-spin stripe order in La-214 high-Tc cuprates have been investigated from measurements of the in-plane electrical-resistivity, Rho_ab_. In La_2-…

cond-mat.supr-con2006★ 31 cited

Shadow bands in single-layered Bi_2Sr_2CuO_6 studied by angle-resolved photoemission spectroscopy

K. Nakayama, T. Sato, T. Dobashi +13

We have performed systematic angle-resolved photoemission spectroscopy (ARPES) on single-layered cuprate superconductor Bi2Sr2CuO6 to elucidate the origin of shadow band. We found…

cond-mat.supr-con2005★ 22 cited

Anisotropic Behavior of Knight Shift in Superconducting State of Na_xCoO_2yH_2O

Y. Ihara, K. Ishida, H. Takeya +8

The Co Knight shift was measured in an aligned powder sample of Na_xCoO_2yH_2O, which shows superconductivity at T_c \sim 4.6 K. The Knight-shift components parallel (K_c) and perp…

cond-mat.supr-con2005★ 41 cited

Valence and Na content dependences of superconductivity in NaxCoO2.yH2O

H. Sakurai, N. Tsujii, O. Suzuki +5

Various samples of sodium cobalt oxyhydrate with relatively large amounts of Na $^{+}$ ions were synthesized by a modified soft-chemical process in which a NaOH aqueous solution was…

cond-mat.supr-con2005★ 8 cited

Superconducting phase diagram of NaxCoO2.yH2O

H. Sakurai, K. Takada, T. Sasaki +1

We synthesized Nax(H3O)zCoO2yH2O samples with various Na/H3O ratios but with the constant Co valence of s = +3.40, and measured their magnetic properties to draw phase diagrams of…

cond-mat.supr-con2005★ 1 cited

$^{23}$ Na NMR Study of Layered Superconductor $N a_{x} C o O_{2} - y H_{2} O$

H. Ohta, C. Michioka, Y. Itoh +5

We measured $^{23}$ Na-NMR spectra and nuclear spin-lattice relaxation rates $^{23} (1/ T_{1})$ of superconducting and non-superconducting bilayer hydrate $N a_{x} C o O_{2} - y H_{2} O$ (x ~ 0.3, y…

cond-mat.supr-con2005★ 15 cited

Phase separation in the vicinity of the surface of $κ$ -(BEDT-TTF) $_{2}$ Cu[N(CN) $_{2}$ ]Br by fast cooling

N. Yoneyama, T. Sasaki, N. Kobayashi +2

Partial suppression of superconductivity by fast cooling has been observed in the organic superconductor $κ$ -(BEDT-TTF) $_{2}$ Cu[N(CN) $_{2}$ ]Br by two means: a marked sample size effect…

cond-mat.supr-con2004★ 52 cited

Weak Magnetic Order in the Bilayered-hydrate Na $_{x}$ CoO $_{2} \cdot y$ H $_{2}$ O Structure Probed by Co Nuclear Quadrupole Resonance - Proposed Phase Diagram in Superconducting Na $_{x}$ CoO $_{2} \cdot$ $y$ H $_{2}$ O

Y. Ihara, K. Ishida, C. Michioka +6

A weak magnetic order was found in a non-superconducting bilayered-hydrate Na $_{x}$ CoO $_{2} \cdot y$ H $_{2}$ O sample by a Co Nuclear Quadrupole Resonance (NQR) measurement. The nucle…

cond-mat.supr-con2004★ 15 cited

Correlation between Tc and Lattice Parameters of Novel Superconducting NaxCoO2 yH2O

H. Sakurai, K. Takada, T. Sasaki +3

We synthesized the five batches of the samples of the novel P3 type superconductor, Na $_{x}$ (H $_{3}$ O) $_{y^{'}}$ CoO $_{2} \cdot y^{''}$ H $_{2}$ O, by the soft chemical process starting from…

cond-mat.supr-con2004★ 36 cited

Magnetic-field effects on the in-plane electrical resistivity in the single-crystal La $_{2 - x}$ Ba $_{x}$ CuO $_{4}$ and La $_{1.6 - x}$ Nd $_{0.4}$ Sr $_{x}$ CuO $_{4}$ around $x = 1/8$ : Relating to the field-induced stripe order

T. Adachi, N. Kitajima, T. Manabe +4

Temperature dependence of the in-plane electrical resistivity, $ρ_{ab}$ , in various magnetic fields has been measured in the single-crystal La $_{2 - x}$ Ba $_{x}$ CuO $_{4}$ with $x=0.08…

cond-mat.supr-con2003★ 28 cited

Impurity Effect on the In-plane Penetration Depth of the Organic Superconductors $κ$ -(BEDT-TTF) $_{2} X$ ( $X$ = Cu(NCS) $_{2}$ and Cu[N(CN) $_{2}$ ]Br)

N. Yoneyama, A. Higashihara, T. Sasaki +2

We report the in-plane penetration depth $λ_{∥}$ of single crystals $κ$ -(BEDT-TTF) $_{2} X$ ( $X =$ Cu(NCS) $_{2}$ and Cu[N(CN) $_{2}$ ]Br) by means of the reversible magnetization meas…

cond-mat.supr-con2003★ 13 cited

The role of the water molecules in novel superconductor, Na $_{0.35}$ CoO $_{2} \cdot$ 1.3H $_{2}$ O

H. Sakurai, K. Takada, F. Izumi +3

In order to investigate the role of the water molecules in Na $_{0.35}$ CoO $_{2} \cdot$ 1.3H $_{2}$ O, we synthesized superconducting Na $_{0.35}$ CoO $_{2} \cdot$ 1.3H $_{2}$ O and nonsupercon…

cond-mat.supr-con2003

Specific heat of unconventional superconductivity in NaxCoO2-yH2O

H. D. Yang, J. -Y. Lin, C. P. Sun +5

Comprehensive studies of the low-temperature specific heat C(T,H) in NaxCoO2-yH2O are presented. At H=0, a very sharp anomaly was observed at T=4.7 K indicating the existence of bu…

cond-mat.supr-con2003★ 40 cited

Possible Spin-triplet Superconductivity in NaxCoO2yH2O - 59Co NMR Study

M. Kato, C. Michioka, T. Waki +7

We report 59Co NMR studies on the magnetically oriented powder samples of Co-oxide superconductors NaxCoO2yH2O with Tc ~ 4.7 K. From two-dimensional powder pattern in the NMR spect…

cond-mat.supr-con2001★ 25 cited

Disorder Effect on the Vortex Pinning by the Cooling Process Control in the Organic Superconductor $κ$ -(BEDT-TTF) $_{2}$ Cu[N(CN) $_{2}$ ]Br

N. Yoneyama, T. Sasaki, T. Nishizaki +1

We investigate the influence of disorders in terminal ethylene groups of BEDT-TTF molecules (ethylene-disorders) on the vortex pinning of the organic superconductor $κ$ -(BEDT-TTF)$…

Pairing interaction in superconducting UCoGe tunable by magnetic field

Two-band superconductivity featuring different anisotropies in the ternary iron silicide Lu2​Fe3​Si5​

Mott transition and superconductivity in the strongly correlated organic superconductor κ-(BEDT-TTF)2​Cu[N(CN)2​]Br