Chiral symmetry restoration at high matter density observed in pionic atoms

Nishi, Takahiro*; Hashimoto, Tadashi; 46 of others*

Nature Physics, 19(6), p.788 - 793, 2023/06

https://doi.org/10.1038/s41567-023-02001-x

Characterization of the shape-staggering effect in mercury nuclei

Marsh, B. A.*; Day Goodacre, T.*; Tsunoda, Yusuke*; Andreyev, A. N.; 41 of others*

Nature Physics, 14(12), p.1163 - 1167, 2018/12

https://doi.org/10.1038/s41567-018-0292-8

Thermodynamic evidence for nematic superconductivity in CuBiSe

Yonezawa, Shingo*; Tajiri, Kengo*; Nakata, Suguru*; Nagai, Yuki; Wang, Z.*; Segawa, Koji*; Ando, Yoichi*; Maeno, Yoshiteru*

Nature Physics, 13(2), p.123 - 126, 2017/02

https://doi.org/10.1038/nphys3907

no abstracts in English

Spin hydrodynamic generation

Takahashi, Ryo*; Matsuo, Mamoru; Ono, Masao; Harii, Kazuya; Chudo, Hiroyuki; Okayasu, Satoru; Ieda, Junichi; Takahashi, Saburo*; Maekawa, Sadamichi; Saito, Eiji

Nature Physics, 12, p.52 - 56, 2016/01

https://doi.org/10.1038/nphys3526

Degenerate Fermi and non-Fermi liquids near a quantum critical phase transition

Kambe, Shinsaku; Sakai, Hironori; Tokunaga, Yo; Lapertot, G.*; Matsuda, Tatsuma*; Knebel, G.*; Flouquet, J.*; Walstedt, R. E.*

Nature Physics, 10(11), p.840 - 844, 2014/11

https://doi.org/10.1038/nphys3101

In new observations reported here, we find that coexisting, static Fermi liquid and non-Fermi liquid states are a key feature of the QCPT in YbRhSi. By means of nuclear magnetic resonance (NMR) spin-lattice relaxation time measurements on a single crystal sample, it is revealed that the FL and NFL states are invariant,while their relative proportion in a crossover is field dependent near the QCPT. Such a pair of states has remained hidden in Ce compounds, owing presumably to short lifetimes for the two states. A new scaling law for the occupation ratio of the two states is derived, and could be widely applicable to Kondo-lattice systems

Polaron spin current transport in organic semiconductors

Watanabe, Shun*; Ando, Kazuya*; Kang, K.*; Mooser, S.*; Vaynzof, Y.*; Kurebayashi, Hidekazu*; Saito, Eiji; Sirringhaus, H.*

Nature Physics, 10(4), p.308 - 313, 2014/04

https://doi.org/10.1038/nphys2901

Charge-induced vortex lattice instability

Mounce, A. M.*; Oh, S.*; Mukhopadhyay, S.*; Halperin, W. P.*; Reyes, A. P.*; Kuhns, P. L.*; Fujita, Kazuhiro*; Ishikado, Motoyuki; Uchida, Shinichi*

Nature Physics, 7(2), p.125 - 128, 2011/02

https://doi.org/10.1038/nphys1835

It has been predicted that superconducting vortices should be electrically charged and that this effect is particularly enhanced for high-temperature superconductors. Hall effect and nuclear magnetic resonance (NMR) experiments suggest the existence of charge accumulation in the vortex core, but the effects are small and the interpretation controversial. Here we show that the Abrikosov vortex lattice, characteristic of the mixed state of superconductors, will become unstable at a sufficiently high magnetic field if there is charge trapped on the vortex core. Our NMR measurements of the magnetic fields generated by vortices in BiSrCaCuO single crystals provide evidence for an electrostatically driven vortex lattice reconstruction with the magnitude of charge on each vortex pancake of , depending on doping, in line with theoretical estimates.

Itinerant to localized transition of electrons in the antiferromagnetic superconductor UPdAl

Fujimori, Shinichi; Saito, Yuji; Okane, Tetsuo; Fujimori, Atsushi*; Yamagami, Hiroshi*; Haga, Yoshinori; Yamamoto, Etsuji; Onuki, Yoshichika*

Nature Physics, 3(9), p.618 - 622, 2007/09

https://doi.org/10.1038/nphys651

In heavy Fermion (HF) compounds, electrons show both itinerant and localized behaviour depending on temperature. Above the characteristic temperature , their magnetic properties are well described by the completely "localized" -electron models. On the other hand, well below , their Fermi surfaces (FS's) have been explained well by the "itinerant" -electron model. These two models assume totally different natures of -electrons, and how they transform between these states as a function of temperatures has never been understood on the level of their electronic structures. Here we have studied the band structure of the HF antiferromagnetic superconductor UPdAl well below and above by angle-resolved photoelectron spectroscopy (ARPES), and have found that the -bands, which form the FS's at low temperatures, are excluded from FS's at high temperatures.

Achievement of robust high-efficiency 1 MW oscillation in the hard-self-excitation region by a 170 GHz continuous-wave gyrotron

Sakamoto, Keishi; Kasugai, Atsushi; Takahashi, Koji; Minami, Ryutaro*; Kobayashi, Noriyuki; Kajiwara, Ken

Nature Physics, 3(6), p.411 - 414, 2007/06

https://doi.org/10.1038/nphys599

The first 1 MW quasi-continuous wave generation is demonstrated at 170 GHz gyrotron of TE31,8 resonator mode with outstanding efficiency of greater than 55 percent. The robust high efficiency oscillation is obtained in a hard self-excitation region with an active control of gyrotron parameters. Furthermore, a novel nonlinear process is found that the desired TE31,8 mode is excited as a parasitic mode of an adjacent TE30,8 mode and finally the TE31,8 dominates a system. This effect extends a substantial soft self-excitation region of the desired mode significantly.