Evidence for a glassy state in strongly driven carbon.

Evidence for a glassy state in strongly driven carbon.
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DOI:
10.1038/srep05214
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发表时间:
2014-06-09
期刊:
影响因子:
4.6
通讯作者:
Gregori G
Gregori G
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Brown CR;Gericke DO;Cammarata M;Cho BI;Döppner T;Engelhorn K;Förster E;Fortmann C;Fritz D;Galtier E;Glenzer SH;Harmand M;Heimann P;Kugland NL;Lamb DQ;Lee HJ;Lee RW;Lemke H;Makita M;Moinard A;Murphy CD;Nagler B;Neumayer P;Plagemann KU;Redmer R;Riley D;Rosmej FB;Sperling P;Toleikis S;Vinko SM;Vorberger J;White S;White TG;Wünsch K;Zastrau U;Zhu D;Tschentscher T;Gregori G

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Here, we report results of an experiment creating a transient, highly correlated carbon state using a combination of optical and x-ray lasers. Scattered x-rays reveal a highly ordered state with an electrostatic energy significantly exceeding the thermal energy of the ions. Strong Coulomb forces are predicted to induce nucleation into a crystalline ion structure within a few picoseconds. However, we observe no evidence of such phase transition after several tens of picoseconds but strong indications for an over-correlated fluid state. The experiment suggests a much slower nucleation and points to an intermediate glassy state where the ions are frozen close to their original positions in the fluid.
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