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Journal Articles

Creation of quark-gluon plasma droplets with three distinct geometries

Aidala, C.*; Hasegawa, Shoichi; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; Tanida, Kiyoshi; PHENIX Collaboration*; 312 of others*

Nature Physics, 15(3), p.214 - 220, 2019/03

 Times Cited Count:55 Percentile:0.47(Physics, Multidisciplinary)

Journal Articles

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

 Times Cited Count:35 Percentile:3.31(Physics, Multidisciplinary)

Journal Articles

Thermodynamic evidence for nematic superconductivity in Cu$$_{x}$$Bi$$_{2}$$Se$$_{3}$$

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

 Times Cited Count:115 Percentile:0.69(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

One-dimensional spinon spin currents

Hirobe, Daichi*; Sato, Masahiro*; Kawamata, Takayuki*; Shiomi, Yuki*; Uchida, Kenichi*; Iguchi, Ryo*; Koike, Yoji*; Maekawa, Sadamichi; Saito, Eiji

Nature Physics, 13(1), p.30 - 34, 2017/01

 Times Cited Count:46 Percentile:3.41(Physics, Multidisciplinary)

Journal Articles

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

 Times Cited Count:44 Percentile:5.98(Physics, Multidisciplinary)

Journal Articles

Colossal thermomagnetic response in the exotic superconductor URu$$_2$$Si$$_2$$

Yamashita, Takuya*; Shimoyama, Yusuke*; Haga, Yoshinori; Matsuda, Tatsuma*; Yamamoto, Etsuji; Onuki, Yoshichika; Sumiyoshi, Hiroaki*; Fujimoto, Satoshi*; Levchenko, A.*; Shibauchi, Takasada*; et al.

Nature Physics, 11(1), p.17 - 20, 2015/01

 Times Cited Count:32 Percentile:11.24(Physics, Multidisciplinary)

Journal Articles

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

 Times Cited Count:17 Percentile:23.5(Physics, Multidisciplinary)

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 YbRh$$_{2}$$Si$$_{2}$$. 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

Journal Articles

Bipartite magnetic parent phases in the iron oxypnictide superconductor

Hiraishi, Masatoshi*; Iimura, Soshi*; Kojima, Kenji*; Yamaura, Junichi*; Hiraka, Haruhiro*; Ikeda, Kazutaka*; Miao, P.*; Ishikawa, Yoshihisa*; Torii, Shuki*; Miyazaki, Masanori*; et al.

Nature Physics, 10(4), p.300 - 303, 2014/04

 Times Cited Count:80 Percentile:3.66(Physics, Multidisciplinary)

Journal Articles

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

 Times Cited Count:126 Percentile:1.77(Physics, Multidisciplinary)

Journal Articles

Emergent rank-5 nematic order in URu$$_2$$Si$$_2$$

Ikeda, Hiroaki*; Suzuki, Michito; Arita, Ryotaro*; Takimoto, Tetsuya*; Shibauchi, Takasada*; Matsuda, Yuji*

Nature Physics, 8(7), p.528 - 533, 2012/07

 Times Cited Count:113 Percentile:3.18(Physics, Multidisciplinary)

The origin of the hidden-order phase transition of URu$$_2$$Si$$_2$$ has been a long-standing mystery in condensed matter physics. We examine the complete set of multipole correlations allowed in URu$$_2$$Si$$_2$$ based on a first-principles theoretical approach. The results uncover that the hidden-order parameter is a rank-5 multipole (dotriacontapole) order with nematic $$E$$$$^{-}$$ symmetry. This naturally provides comprehensive explanations of all key features in the hidden-order phase including anisotropic magnetic excitations, nearly degenerate antiferromagnetic-ordered state, and spontaneous rotational symmetry breaking.

Journal Articles

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

 Times Cited Count:6 Percentile:52.47(Physics, Multidisciplinary)

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 Bi$$_{2}$$Sr$$_{2}$$CaCu$$_{2}$$O$$_{8+y}$$ single crystals provide evidence for an electrostatically driven vortex lattice reconstruction with the magnitude of charge on each vortex pancake of $$sim2 times 10^{-3}e$$, depending on doping, in line with theoretical estimates.

Journal Articles

Quasiparticle interference and superconducting gap in Ca$$_{2-x}$$Na$$_x$$CuO$$_2$$Cl$$_2$$

Hanaguri, Tetsuo*; Kosaka, Yuki*; Davis, J. C.*; Lupien, C.*; Yamada, Ikuya*; Azuma, Masaki*; Takano, Mikio*; Oishi, Kazuki; Ono, Masaki*; Takagi, Hidenori*

Nature Physics, 3(12), p.865 - 871, 2007/12

 Times Cited Count:128 Percentile:3.98(Physics, Multidisciplinary)

Journal Articles

Itinerant to localized transition of $$f$$ electrons in the antiferromagnetic superconductor UPd$$_2$$Al$$_3$$

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

 Times Cited Count:42 Percentile:15.81(Physics, Multidisciplinary)

In heavy Fermion (HF) compounds, $$f$$ electrons show both itinerant and localized behaviour depending on temperature. Above the characteristic temperature $$T^*$$, their magnetic properties are well described by the completely "localized" $$f$$-electron models. On the other hand, well below $$T^*$$, their Fermi surfaces (FS's) have been explained well by the "itinerant" $$f$$-electron model. These two models assume totally different natures of $$f$$-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 UPd$$_2$$Al$$_3$$ well below and above $$T^*$$ by angle-resolved photoelectron spectroscopy (ARPES), and have found that the $$f$$-bands, which form the FS's at low temperatures, are excluded from FS's at high temperatures.

Journal Articles

Spin-lattice instability to a fractional magnetization state in the spinel HgCr$$_{2}$$O$$_{4}$$

Matsuda, Masaaki; Ueda, Hiroaki*; Kikkawa, Akiko*; Tanaka, Yoshikazu*; Katsumata, Koichi*; Narumi, Yasuo*; Inami, Toshiya; Ueda, Yutaka*; Lee, S.-H.*

Nature Physics, 3(6), p.397 - 400, 2007/06

 Times Cited Count:88 Percentile:6.76(Physics, Multidisciplinary)

Cr-CrCr-based spinel compounds ACr$$_{2}$$O$$_{4}$$ (A=Mg, Zn, Cd, and Hg) are so far the best model systems for a network of corner-sharing tetrahedrons with isotropic nearest-neighbor antiferromagnetic interactions. The systems exhibit novel spin-Peierls phase transitions from cubic spin liquid to non-cubic N$'e$el states at low temperatures. Recent bulk magnetization studies on CdCr$$_{2}$$O$$_{4}$$ and HgCr$$_{2}$$O$$_{4}$$ revealed the magnetic field-induced half magnetization plateau states that are stable over a wide range of field. Recent bulk magnetization studies on CdCr$$_{2}$$O$$_{4}$$ and HgCr$$_{2}$$O$$_{4}$$ revealed the magnetic field-induced half magnetization plateau states that are stable over a wide range of field.

Journal Articles

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

 Times Cited Count:183 Percentile:2.26(Physics, Multidisciplinary)

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.

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