Search Results:　 1-20 of 127

Hayami Satoru , Udagawa Masafumi , Motome Yukitoshi

The ground state of the periodic Anderson model on a triangular lattice is systematically investigated by mean-field approximation. We found that the model exhibits two different types of partially di …

J Phys Soc Jpn 81(10), 103707-103707-4, 2012-10-15

The Physical Society of Japan

Sato Toshihiro , Hattori Kazumasa , Tsunetsugu Hirokazu

We study electric transport near the Mott metal--insulator transition. Optical conductivity of the half-filled Hubbard model on a triangular lattice is calculated based on a cellular dynamical mean fi …

J Phys Soc Jpn 81(8), 083703-083703-4, 2012-08-15

The Physical Society of Japan

Nakajima Saori , Suzuki Takao , Ishii Yasuyuki , Ohishi Kazuki , Watanabe Isao , Goto Takayuki , Oosawa Akira , Yoneyama Naoki , Kobayashi Norio , Pratt Francis L. , Sasaki Takahiko

… The ground state of the quantum spin system \kappa-(BEDT-TTF)2Cu2(CN)3, in which antiferromagnetically interacting S=1/2 spins are located on a nearly equilateral triangular lattice, attracts considerable interest from both experimental and theoretical aspects, because a simple antiferromagnetic order may be inhibited owing to geometrical frustration, and hence, an exotic ground state is expected. …

J Phys Soc Jpn 81(6), 063706-063706-4, 2012-06-15

The Physical Society of Japan

Okamoto Yoshihiko , Ishikawa Hajime , Nilsen G{\o}ran J. , Hiroi Zenji

… Remarkably, a spin entropy is more gradually released upon cooling below T_{\text{N}} compared with a conventional magnetic long-range order, which may originate from the geometrical frustration still present in this highly distorted kagome lattice. …

J Phys Soc Jpn 81(3), 033707-033707-4, 2012-03-15

The Physical Society of Japan

Ochiai Akira , Matsuda Saori , Ikeda Yusuke , Shimizu Yasunobu , Toyoshima Shigenori , Aoki Haruyoshi , Katoh Kenichi

The physical properties of Yb2Pt2Pb, which has been considered to be a geometrically frustrated antiferromagnet with the Shastry--Sutherland lattice, are investigated by magnetization and specific hea …

J Phys Soc Jpn 80(12), 123705-123705-4, 2011-12-15

The Physical Society of Japan

Masuda Takatsugu , Hagihala Masato , Kondoh Yosuke , Kaneko Koji , Metoki Naoto

… Quantum fluctuation, geometrical frustration, and interchain interaction induce an exotic spin density wave long-range order in the insulating magnet. …

J Phys Soc Jpn 80(11), 113705-113705-4, 2011-11-15

The Physical Society of Japan

Tsukamoto Yuto , Okamoto Yoshihiko , Matsuhira Kazuyuki , Whangbo Myung-Hwan , Hiroi Zenji

… This transition generates a large internal magnetic field at the Ce site in spite of the fact that simple Heisenberg interactions should be cancelled out at the Ce site owing to geometrical frustration. …

J Phys Soc Jpn 80(9), 094708-094708-5, 2011-09-15

The Physical Society of Japan

Manaka Hirotaka , Etoh Toshiya , Honda Yuta , Iwashita Naoki , Ogata Kenichi , Terada Norio , Hisamatsu Toru , Ito Masakazu , Narumi Yasuo , Kondo Akihiro , Kindo Koichi , Miura Yoko

… In both compounds, geometrical spin frustration in the triangular planes coexists with one-dimensionality along the tubes. …

J Phys Soc Jpn 80(8), 084714-084714-11, 2011-08-15

The Physical Society of Japan

Matsumura Takeshi , Okuyama Daisuke , Mouri Takuya , Murakami Youichi

… The general success of the mean-field calculation, except for the short-range order, suggests that there is little effect of geometrical frustration on the macroscopic properties at zero magnetic field. …

J Phys Soc Jpn 80(7), 074701-074701-9, 2011-07-15

The Physical Society of Japan