Large negative magnetoresistance induced by anionic solid solutions in two-dimensional spin-frustrated transition metal chalcogenides.
We report an anionic solid solution process that induces frustrated magnetic structures within two-dimensional transition metal chalcogenides, which leads to huge negative magnetoresistance effects. Ultrathin nanosheets of TiTe(2-x)I(x) solid solutions, which are a new class of inorganic two-dimensional magnetic material, exhibit negative magnetoresistance with a value of up to -85%, due to the spin-dependent scattering effects of local Ti(3+) 3d(1) moments that are antiferromagnetically coupled. Moreover, TiTe(2-x)I(x) serials show unique transport behaviors with continuous evolution from metallic to semiconducting states. We anticipate that anionic doping will be a powerful tool for optimizing the intrinsic physical properties of two-dimensional transition metal chalcogenide system.
Hefei National Laboratory for Physical Sciences at Microscale and Collaborative Innovation Center of Chemistry for Energy Materials, University of Science and Technology of China, Hefei, Anhui 230026, China.
Yuqiao
Y
Guo
Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA.
Jun
J
Dai
Hefei National Laboratory for Physical Sciences at Microscale and Collaborative Innovation Center of Chemistry for Energy Materials, University of Science and Technology of China, Hefei, Anhui 230026, China.
Jiyin
J
Zhao
Hefei National Laboratory for Physical Sciences at Microscale and Collaborative Innovation Center of Chemistry for Energy Materials, University of Science and Technology of China, Hefei, Anhui 230026, China.
Changzheng
C
Wu
Hefei National Laboratory for Physical Sciences at Microscale and Collaborative Innovation Center of Chemistry for Energy Materials, University of Science and Technology of China, Hefei, Anhui 230026, China.
Dianqi
D
Li
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China.
Lidong
L
Zhang
High Magnetic Field Laboratory, Chinese Academy of Science, Hefei, Anhui 230031, China.
Wei
W
Ning
High Magnetic Field Laboratory, Chinese Academy of Science, Hefei, Anhui 230031, China.
Mingliang
M
Tian
Hefei National Laboratory for Physical Sciences at Microscale and Collaborative Innovation Center of Chemistry for Energy Materials, University of Science and Technology of China, Hefei, Anhui 230026, China and Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, USA.
Xiao Cheng
XC
Zeng
Hefei National Laboratory for Physical Sciences at Microscale and Collaborative Innovation Center of Chemistry for Energy Materials, University of Science and Technology of China, Hefei, Anhui 230026, China.
Yi
Y
Xie