Spatially Modulated Superfluid State in Two-Dimensional ^{4}He Films.
Spatially Modulated Superfluid State in Two-Dimensional ^{4}He Films.
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二维 ^{4}He 薄膜中的空间调制超流体状态。
DOI：
10.1103/physrevlett.127.135301
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发表时间：
2021
影响因子：
8.6
通讯作者：
Eunseong Kim
中科院分区：
文献类型：
--
作者：
Jaewon Choi;A. Zadorozhko;Jeakyung Choi;Eunseong Kim
吸附在石墨衬底上的第二层^{4}He膜是研究超流与结构有序之间相互作用的一个很好的实验平台。在这里，我们报告了一个刚性双频扭转振子研究的第二层作为温度和^{4}He原子密度的函数。我们第一次通过实验证明了超流密度与频率无关，这可以被解释为真正的超流性的明确证据。在这项工作中建立的相图显示，一个超流相共存的六角密度波关联和注册的固相。这表明第二层是两个奇异量子基态的候选者：超流和结构有序之间相互作用产生的空间调制超流和超固相。
The second layer of ^{4}He films adsorbed on a graphite substrate is an excellent experimental platform to study the interplay between superfluid and structural orders. Here, we report a rigid two-frequency torsional oscillator study on the second layer as a function of temperature and ^{4}He atomic density. For the first time, we show experimentally that the superfluid density is independent of frequency, which can be interpreted as unequivocal evidence of genuine superfluidity. The phase diagram established in this work reveals that a superfluid phase coexists with hexatic density-wave correlation and a registered solid phase. This suggests the second layer as a candidate for hosting two exotic quantum ground states: the spatially modulated superfluid and supersolid phases resulting from the interplay between superfluid and structural orders.
影响因子：
19.6
作者：
Chang, J.;Blackburn, E.;Hayden, S. M.
通讯作者：
Hayden, S. M.
DOI：
10.1073/pnas.2002429117
发表时间：
2020-06-30
影响因子：
11.1
作者：
Choubey, Peayush;Joo, Sang Hyun;Hirschfeld, P. J.
通讯作者：
Hirschfeld, P. J.