Spin-Orbital Short-Range Order on a Honeycomb-Based Lattice

被引：123

作者：

Nakatsuji, S. ^{[1
]}

Kuga, K. ^{[1
]}

Kimura, K. ^{[1
]}

Satake, R. ^{[2
]}

Katayama, N. ^{[2
]}

Nishibori, E. ^{[2
]}

Sawa, H. ^{[2
]}

Ishii, R. ^{[3
]}

Hagiwara, M. ^{[3
]}

Bridges, F. ^{[4
]}

Ito, T. U. ^{[5
]}

Higemoto, W. ^{[5
]}

Karaki, Y. ^{[6
]}

Halim, M. ^{[7
]}

Nugroho, A. A. ^{[7
]}

Rodriguez-Rivera, J. A. ^{[8
,9
]}

Green, M. A. ^{[8
,9
]}

Broholm, C. ^{[8
,10
,11
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[2] Nagoya Univ, Grad Sch Engn, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

[3] Osaka Univ, KYOKUGEN, Toyonaka, Osaka 5608531, Japan

[4] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA

[5] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[6] Univ Ryukyus, Fac Educ, Nishihara, Okinawa 9030213, Japan

[7] Inst Teknol Bandung, Fac Math & Nat Sci, Bandung 40132, Indonesia

[8] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA

[9] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

[10] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[11] Johns Hopkins Univ, IQM, Baltimore, MD 21218 USA

来源：

SCIENCE | 2012年 / 336卷 / 6081期

基金：

日本学术振兴会;

关键词：

FRUSTRATED MAGNETS; QUANTUM; MODEL; ANTIFERROMAGNETS; FLUCTUATIONS; LIQUIDS; STATES;

D O I：

10.1126/science.1212154

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Frustrated magnetic materials, in which local conditions for energy minimization are incompatible because of the lattice structure, can remain disordered to the lowest temperatures. Such is the case for Ba3CuSb2O9, which is magnetically anisotropic at the atomic scale but curiously isotropic on mesoscopic length and time scales. We find that the frustration of Wannier's Ising model on the triangular lattice is imprinted in a nanostructured honeycomb lattice of Cu2+ ions that resists a coherent static Jahn-Teller distortion. The resulting two-dimensional random-bond spin-1/2 system on the honeycomb lattice has a broad spectrum of spin-dimer-like excitations and low-energy spin degrees of freedom that retain overall hexagonal symmetry.

引用

页码：559 / 563

页数：5

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