Pressure-Driven Cooperative Spin-Crossover, Large-Volume Collapse, and Semiconductor-to-Metal Transition in Manganese(II) Honeycomb Lattices

Wang, Yonggang1,2,3; Zhou, Zhengyang3,4; Wen, Ting5; Zhou, Yannan5; Li, Nana6; Han, Fei2,6,7; Xiao, Yuming8; Chow, Paul8; Sung, Junliang3; Pravica, Michael1; Cornelius, Andrew L.1; Yang, Wenge2,6; Zhao, Yusheng1,9

2016-12-07

10.1021/jacs.6b10225

Journal of the American Chemical Society   影响因子和分区

0002-7863

Spin-crossover (SCO) is generally regarded as a spectacular molecular magnetism in 3d(4)-3d(7) metal complexes and holds great promise for various applications such as memory, displays, and sensors. In particular, SCO materials can be multifunctional when a classical light- or temperature induced SCO occurs along with other cooperative structural and/or electrical transport alterations. However, such a cooperative SCO has rarely been observed in condensed matter under hydrostatic pressure (an alternative external stimulus to light or temperature), probably due to the lack of synergy between metal neighbors under compression. Here, we report the observation of a pressure-driven, cooperative SCO in the two-dimensional (2D) honeycomb antiferromagnets MnPS3 and MnPSe3 at room temperature. Applying pressure to this confined 2D system leads to a dramatic magnetic moment collapse of Mn2+ (d(5)) from S = 5/2 to S = 1/2. Significantly, a number of collective phenomena were observed along with the SCO, including a large lattice collapse (similar to 20% in volume), the formation of metallic bonding, and a semiconductor-to-metal transition. Experimental evidence shows that all of these events occur in the honeycomb lattice, indicating a strongly cooperative mechanism that facilitates the occurrence of the abrupt pressure-driven SCO. We believe that the observation of this cooperative pressure-driven SCO in a 2D system can provide a rare model for theoretical investigations and lead to the discovery of more pressure-responsive multifunctional materials.

SCI ; EI

英语

NI论文

通讯

[DE-NA0001982]

Chemistry

Chemistry, Multidisciplinary

WOS:000389623800036

AMER CHEMICAL SOC

20165003128011

Condensed matter physics ; Honeycomb structures ; Hydrostatic pressure ; Magnetic moments ; Metal complexes ; Metals ; Phosphorus compounds ; Selenium compounds

Structural Members and Shapes:408.2 ; Liquid Dynamics:631.1.1 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Inorganic Compounds:804.2

Web of Science

1.Univ Nevada, High Pressure Sci & Engn Ctr, Las Vegas, NV 89154 USA
2.Carnegie Inst Sci, HPSynC, Geophys Lab, Argonne, IL 60439 USA
3.Peking Univ, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
4.Chongqing Univ, Coll Chem & Chem Engn, Chongqing 400044, Peoples R China
5.Huanghe Sci & Technol Coll, Inst Nanostruct Funct Mat, Zhengzhou 450006, Henan, Peoples R China
6.Ctr High Pressure Sci & Technol Adv Res HPSTAR, Shanghai 201203, Peoples R China
7.Florida Int Univ, Dept Mech & Mat Engn, Ctr Study Matter Extreme Condit, Miami, FL 33199 USA
8.Carnegie Inst Sci, Geophys Lab, HPCAT, Argonne, IL 60439 USA
9.Southern Univ Sci & Technol, Shenzhen 518055, Peoples R China

Wang, Yonggang,Zhou, Zhengyang,Wen, Ting,et al. Pressure-Driven Cooperative Spin-Crossover, Large-Volume Collapse, and Semiconductor-to-Metal Transition in Manganese(II) Honeycomb Lattices[J]. Journal of the American Chemical Society,2016,138(48):15751-15757.

Wang, Yonggang.,Zhou, Zhengyang.,Wen, Ting.,Zhou, Yannan.,Li, Nana.,...&Zhao, Yusheng.(2016).Pressure-Driven Cooperative Spin-Crossover, Large-Volume Collapse, and Semiconductor-to-Metal Transition in Manganese(II) Honeycomb Lattices.Journal of the American Chemical Society,138(48),15751-15757.

Wang, Yonggang,et al."Pressure-Driven Cooperative Spin-Crossover, Large-Volume Collapse, and Semiconductor-to-Metal Transition in Manganese(II) Honeycomb Lattices".Journal of the American Chemical Society 138.48(2016):15751-15757.