Bulletin of the American Physical Society
APS March Meeting 2014
Volume 59, Number 1
Monday–Friday, March 3–7, 2014; Denver, Colorado
Session G36: Invited Session: Condensed Matter Physics in China |
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Sponsoring Units: FIP Chair: Esen Alp, Argonna National Laboratory Room: 703 |
Tuesday, March 4, 2014 11:15AM - 11:51AM |
G36.00001: History, Present and Future of IoP and Solving the unsolvable integrable models Invited Speaker: Yupeng Wang The talk contains two parts. In the first part, I'll give a brief introduction of the Institute of Physics, Chinese Academy of Sciences, including the history, present and future. The main missions and the achievements will also be introduced. In the second part, I'll talk about a newly proposed theoretical method which has been successfully used to solving some long-standing problems in the field of integrable models. [Preview Abstract] |
Tuesday, March 4, 2014 11:51AM - 12:27PM |
G36.00002: Surface Studies of Ice Invited Speaker: Enge Wang Despite ice being a ubiquitous and well-studied substance, it is surprising that some basic questions about its surface properties are still debated. Here computer simulations are used to study the unusual structure and dynamics of ice surface at atomic scale. An order parameter, which defines the ice surface energy, is identified for the first time. A classical electrostatic model proves useful to explain the physics inside. We predict that the proton order-disorder transition, which occurs in the bulk at $\sim$ 72 K, will not occur at the surface at any temperature below surface melting. In addition, we find that the surface of crystalline ice exhibits a remarkable variance in vacancy formation energies that is more characteristic of an amorphous material. A fraction of surface molecules are bound by less than the strength of a single hydrogen bond, yet other sites are more strongly bound than those in the crystal interior. Vacancy energies are found to be as low as $\sim$ 0.1eV at the surface, leading to a higher than expected concentration of vacancies at the external layer. Once a surface vacancy is formed, the energetic cost of forming neighbouring vacancies is greatly reduced, facilitating pits on the surface and other processes that may contribute to the phenomenon of pre-melting and quasi-liquid layer formation. Finally, we show that the distribution of local arrangement of dangling atoms, characterized by a surface proton order parameter, is also of crucial importance for the adsorption of water monomer on ice surface. The positive correlation of adsorption energy of water monomer with surface proton ordering suggests that the adsorption may prefer to firstly occur in the inhomogeneous surface, which sheds light on our understanding of the ice nucleation and growth as well as other physical/chemical reactivity in high altitude clouds. [Preview Abstract] |
Tuesday, March 4, 2014 12:27PM - 1:03PM |
G36.00003: Pressure tuned novel states of new quantum materials Invited Speaker: Changqing Jin High Pressure plays significant role in shaping quantum materials states. Pressure can effectively modify spin, charge or orbital features that in turn change physical properties of quantum matters. We will introduce our recent works [1-8] along the direction in this presentation based on wide international collaborations. We thank our collaborators for their significant contributions.\\[4pt] [1] C. Q. Jin \textit{et al};\textbf{ Proc. Natl. Acad. Sci. USA}\textbf{\textit{,}}\textbf{ 105}, 7115 (2008).\\[0pt] [2] X. C. Wang et al, \textbf{Solid State Communications 148}, 538 (2008).\\[0pt] [3] D. Haskel et al., \textbf{Phys. Rev. Letts. 109}, 027204 (2012).\\[0pt] [4] J.G. Zhao \textit{et al}, \textbf{J. Am. Chem. Soc.130}, 13828 (2008).\\[0pt] [5] J. L. Zhang et al., \textbf{Proc. Natl Acad. Sci. 108}, 24 (2011).\\[0pt] [6] Z. Deng et al \textbf{Nature Communications 2}, 422 (2011).\\[0pt] [7] J. G. Cheng et al., \textbf{Phys. Rev. Letts. 108,} 236403 (2012).\\[0pt] [8] K. Zhao et al.\textbf{ Nature Communications 4}: 1442 (2013). [Preview Abstract] |
Tuesday, March 4, 2014 1:03PM - 1:39PM |
G36.00004: Introduction of BASIC (Beijing Advanced Sciences and Innovation Centre) Invited Speaker: Hong Ding In this talk I will review the goal, planning, and current status of Beijing Advanced Sciences and Innovation Centre (BASIC), which will become the first multidisciplinary basic science laboratory within Chinese Academy of Sciences. I will mainly focus on some of large-scale scientific facilities which may be built inside BASIC in the near future. [Preview Abstract] |
Tuesday, March 4, 2014 1:39PM - 2:15PM |
G36.00005: Half-Century of Chinese Condensed Matter Physics--from humble beginnings Invited Speaker: Lu Yu Half-century ago, modern condensed matter physics was almost non-existing in China. During the past 30 years, especially since the beginning of the 21 century, the situation has changed drammatically. A number of outstanding young physicists from China, with cutting edge research output, appeared on the World arena. How did this quantal transition occur? From a personal perspective, I will discuss some early attempts to build-up research capacities, interruptions during the ``cultural revolution,'' survival of scientific work, opening-up to the World and revival of research. The transition from total isolation to close international exchange and collaboration is a crucial factor contributing to this success. [Preview Abstract] |
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