title: Tinselenidene: a Two-dimensional Auxetic Material with Ultralow Lattice Thermal Conductivity and Ultrahigh Hole Mobility.
abstract: By means of extensive ab initio calculations, a new two-dimensional (2D) atomic material tin selenide monolayer (coined as tinselenidene) is predicted to be a semiconductor with an indirect gap (~1.45 eV) and a high hole mobility (of order 10000 cm(2)V(-1)S(-1)), and will bear an indirect-direct gap transition under a rather low strain (<0.5 GPa). Tinselenidene has a very small Young's modulus (20-40 GPa) and an ultralow lattice thermal conductivity (<3 Wm(-1)K(-1) at 300 K), making it probably the most flexible and most heat-insulating material in known 2D atomic materials. In addition, tinseleniden has a large negative Poisson's ratio of -0.17, thus could act as a 2D auxetic material. With these intriguing properties, tinselenidene could have wide potential applications in thermoelectrics, nanomechanics and optoelectronics.
authors.affiliation: College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, China 100049.
authors.forename: Li-Chuan
authors.initials: LC
authors.lastname: Zhang
authors.affiliation: College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, China 100049.
authors.forename: Guangzhao
authors.initials: G
authors.lastname: Qin
authors.affiliation: School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China 100049.
authors.forename: Wu-Zhang
authors.initials: WZ
authors.lastname: Fang
authors.affiliation: School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China 100049.
authors.forename: Hui-Juan
authors.initials: HJ
authors.lastname: Cui
authors.affiliation: School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China 100049.
authors.forename: Qing-Rong
authors.initials: QR
authors.lastname: Zheng
authors.affiliation: College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, China 100049.
authors.forename: Qing-Bo
authors.initials: QB
authors.lastname: Yan
authors.affiliation: School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China 100049.
authors.forename: Gang
authors.initials: G
authors.lastname: Su
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