Strong magnetic instability in correlated metallic Bi2Ir2O7
作者： T F Qi , O B Korneta , Xiangang Wan , L E DeLong , P Schlottmann
DOI: 10.1088/0953-8984/24/34/345601
关键词: Condensed matter physics 、 Field (physics) 、 Wilson ratio 、 Instability 、 Metal 、 Paramagnetism 、 Ground state 、 Electrical resistivity and conductivity 、 Magnetic susceptibility 、 Chemistry
摘要: We report an experimental/theoretical study of single-crystal Bi2Ir2O7 that possesses a metallic state with strongly exchange-enhanced paramagnetism. The ground is characterized by the following features: (1) divergent low-temperature magnetic susceptibility indicates no long-range order down to 50?mK; (2) field-dependent coefficients T and T3 terms specific heat; (3) conspicuously large Wilson ratio RW???53.5; (4) unusual temperature field dependences Hall resistivity abruptly change below 80?K, without any clear correlation behavior. All these unconventional properties suggest existence exotic in Bi2Ir2O7.
harvard.edu
sci-hub.se 参考文章(45)
G. Cao, V. Durairaj, S. Chikara, L. E. DeLong, S. Parkin, P. Schlottmann, Non-Fermi-liquid behavior in nearly ferromagneticSrIrO3single crystals Physical Review B. ,vol. 76, pp. 100402- ,(2007) , 10.1103/PHYSREVB.76.100402
O. B. Korneta, S. Chikara, S. Parkin, L. E. DeLong, P. Schlottmann, G. Cao, Pressure-induced insulating state in Ba 1 − x R x IrO 3 ( R = Gd , Eu) single crystals Physical Review B. ,vol. 81, pp. 045101- ,(2010) , 10.1103/PHYSREVB.81.045101
I. Franke, P. J. Baker, S. J. Blundell, T. Lancaster, W. Hayes, F. L. Pratt, G. Cao, Measurement of the internal magnetic field in the correlated iridates Ca4IrO6, Ca5Ir3O12, Sr3Ir2O7and Sr2IrO4 Physical Review B. ,vol. 83, pp. 094416- ,(2011) , 10.1103/PHYSREVB.83.094416
Ashvin Vishwanath, Ashvin Vishwanath, Sergey Y. Savrasov, Sergey Y. Savrasov, Xiangang Wan, Ari M. Turner, Topological semimetal and Fermi-arc surface states in the electronic structure of pyrochlore iridates Physical Review B. ,vol. 83, pp. 205101- ,(2011) , 10.1103/PHYSREVB.83.205101
S. J. Moon, H. Jin, K. W. Kim, W. S. Choi, Y. S. Lee, J. Yu, G. Cao, A. Sumi, H. Funakubo, C. Bernhard, T. W. Noh, Dimensionality-controlled insulator-metal transition and correlated metallic state in 5d transition metal oxides Sr n+1Ir nO3n+1 (n=1, 2, and infinity) Physical Review Letters. ,vol. 101, pp. 226402- 226402 ,(2008) , 10.1103/PHYSREVLETT.101.226402
C. Pfleiderer, M. Uhlarz, S. M. Hayden, R. Vollmer, H. v. Löhneysen, N. R. Bernhoeft, G. G. Lonzarich, Coexistence of superconductivity and ferromagnetism in the d-band metal ZrZn2. Nature. ,vol. 412, pp. 58- 61 ,(2001) , 10.1038/35083531
G. Cao, V. Durairaj, S. Chikara, S. Parkin, P. Schlottmann, Partial antiferromagnetism in spin-chain Sr 5 Rh 4 O 12 , Ca 5 Ir 3 O 12 , and Ca 4 Ir O 6 single crystals Physical Review B. ,vol. 75, pp. 134402- ,(2007) , 10.1103/PHYSREVB.75.134402
Kazuyuki Matsuhira, Makoto Wakeshima, Ryo Nakanishi, Takaaki Yamada, Akira Nakamura, Wataru Kawano, Seishi Takagi, Yukio Hinatsu, Metal–Insulator Transition in Pyrochlore Iridates Ln2Ir2O7 (Ln = Nd, Sm, and Eu) Journal of the Physical Society of Japan. ,vol. 76, pp. 043706- ,(2007) , 10.1143/JPSJ.76.043706
M.A. Subramanian, G. Aravamudan, G.V. Subba Rao, Oxide pyrochlores — A review Progress in Solid State Chemistry. ,vol. 15, pp. 55- 143 ,(1983) , 10.1016/0079-6786(83)90001-8
B. J. Kim, Hosub Jin, S. J. Moon, J.-Y. Kim, B.-G. Park, C. S. Leem, Jaejun Yu, T. W. Noh, C. Kim, S.-J. Oh, J.-H. Park, V. Durairaj, G. Cao, E. Rotenberg, Novel Jeff=1/2 Mott state induced by relativistic spin-orbit coupling in Sr2IrO4. Physical Review Letters. ,vol. 101, pp. 076402- ,(2008) , 10.1103/PHYSREVLETT.101.076402