K. Tokiwa

activity

20042026

most citedUniform Mixing of High-Tc Superconductivity and Antiferromagnetism on a Single CuO2 Plane in Hg-based Five-layered Cuprate

120 citations · 418 across the 12 of their papers we have counts for

collaborators

12 papers

cond-mat.supr-con2026

BCS-BEC crossover driven by small Fermi pockets of a high-Tc cuprate superconductor

Junhyeok Jeong, Yamato Enomoto, Yoshimitsu Kohama +16

Fermi arcs observed in underdoped cuprates have sparked debate over whether they represent segments of a large Fermi surface or small Fermi pockets. This ambiguity has long hindere…

cond-mat.supr-con2023★ 28 cited

Unveiling phase diagram of the lightly doped high-Tc cuprate superconductors with disorder removed

Kifu Kurokawa, Shunsuke Isono, Yoshimitsu Kohama +11

The currently established electronic phase diagram of cuprates is based on a study of single- and double-layered compounds. These CuO $_{2}$ planes, however, are directly contacted wi…

cond-mat.supr-con2020★ 59 cited

Observation of small Fermi pockets protected by clean CuO2 sheets of a high-Tc superconductor

So Kunisada, Shunsuke Isono, Yoshimitsu Kohama +15

The superconductivity of high transition temperature (Tc) occurs in copper oxides with carrier-doping to an antiferromagnetic (AF) Mott insulator. This discovery more than thirty y…

cond-mat.supr-con2017★ 12 cited

Multilayered cuprate superconductor Ba $_{2}$ Ca $_{5}$ Cu $_{6}$ O $_{12}$ (O $_{1 - x}$ ,F $_{x}$ ) $_{2}$ studied by temperature-dependent scanning tunneling microscopy and spectroscopy

Akira Sugimoto, Toshikazu Ekino, Alexander M. Gabovich +3

Scanning tunneling microscopy/spectroscopy (STM/STS) measurements were carried out on a multi-layered cuprate superconductor Ba $_{2}$ Ca $_{5}$ Cu $_{6}$ O $_{12}$ (O $_{1 - x}$ ,F $_{x}$ ) $_{2}$ . STM to…

cond-mat.supr-con2016★ 5 cited

Novel Interplay between High-Tc Superconductivity and Antiferromagnetism in Tl-based Six-CuO2-Layered Cuprates : 205 Tl and 63 Cu-NMR Probes

Hidekazu Mukuda, Nozomu Shiki, Naoki Kimoto +4

We report $^{63}$ Cu- and $^{205}$ Tl-NMR studies on six-layered ( $n$ =6) high- $T_{c}$ superconducting (SC) cuprate TlBa $_{2}$ Ca $_{5}$ Cu $_{6}$ O $_{14 + δ}$ (Tl1256) with $T_{c} \sim$ 100 K, which re…

cond-mat.supr-con2014★ 17 cited

Experimental observation of a first-order phase transition below the superconducting transition temperature in the multilayer cuprate superconductor HgBa $_{2}$ Ca $_{4}$ Cu $_{5}$ O $_{y}$

Y. Tanaka, A. Iyo, S. Itoh +3

A first-order phase transition is found in the multilayer cuprate superconductor, HgBa $_{2}$ Ca $_{4}$ Cu $_{5}$ O $_{y}$ (Hg-1245), with a superconducting transition temperature of 108 K, under…