Superfluidity of liquid 4He confined to one-dimensional straight nanochannel structures
Superfluidity of liquid 4He confined to one-dimensional straight nanochannel structures
复制标题
液体 4He 的超流动性局限于一维直纳米通道结构
DOI：
10.1103/physrevb.82.104509
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发表时间：
2010
影响因子：
3.7
通讯作者：
Masaru Suzuki
中科院分区：
文献类型：
--
作者：
J. Taniguchi;Y. Aoki;Masaru Suzuki
用扭转振子研究了一维纳米尺度通道中液体的超流性。当通道直径大于2.8 nm时，液体在低温下变为超流体，并观察到量子化涡旋的耗散。4.7 nm通道在0.14 Mpa时的超流起始温度为1.8K，而2.8 nm通道在0.01 Mpa时的超流起始温度为0.89K。对于后者，它在压力的作用下受到强烈的抑制，在绝对零度下，它在2.1 Mpa附近不断接近于零，这表明一维通道中的超流态和非超流态之间存在量子相变。
Superfluidity of liquidconfined in one-dimensional (1D) nanometer-size channels has been studied by means of a torsional oscillator. When the channel is larger than 2.8 nm in diameter, liquidbecomes superfluid at low temperatures and a dissipation due to quantized vortex is observed. The superfluid onset temperature is 1.8 K at 0.14 MPa for the 4.7 nm channel and 0.89 K at 0.01 MPa for the 2.8 nm channel. For the latter, it is suppressed strongly under the application of pressure, and continuously approaches zero at around 2.1 MPa at absolute zero, which suggests a quantum phase transition between the superfluid and nonsuperfluid states in the 1D channel.