Experimental and theoretical investigation of the thermal effect in the Casimir interaction from graphene
Experimental and theoretical investigation of the thermal effect in the Casimir interaction from graphene
复制标题
石墨烯卡西米尔相互作用热效应的实验和理论研究
DOI:
10.1103/physrevb.104.085436
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发表时间:
2021
影响因子:
3.7
通讯作者:
Mohideen, U.
中科院分区:
文献类型:
--
作者:
Liu, M.;Zhang, Y.;Klimchitskaya, G. L.;Mostepanenko, V. M.;Mohideen, U.
We present the results of an experiment on measuring the gradient of the Casimir force between an Au-coated hollow glass microsphere and graphene-coated fused silica plate by means of a modified atomic force microscope cantilever-based technique operated in the dynamic regime. These measurements were performed in high vacuum at room temperature. The energy gap and the concentration of impurities in the graphene sample used have been measured utilizing scanning tunneling spectroscopy and Raman spectroscopy, respectively. The measurement results for the gradients of the Casimir force are found to be in a very good agreement with theory using the polarization tensor of graphene at nonzero temperature depending on the energy gap and chemical potential with no fitting parameters. The theoretical predictions of the same theory at zero temperature are experimentally excluded over the measurement region from 250 to 517 nm. We have also investigated a dependence of the thermal correction to the Casimir force gradient on the values of the energy gap, chemical potential, and on the presence of a substrate supporting the graphene sheet. It is shown that the observed thermal effect is consistent in size with that arising for pristine graphene sheets if the impact of real conditions such as nonzero values of the energy gap, chemical potential, and the presence of a substrate is included. Implications of the obtained results to the resolution of the long-standing problems in Casimir physics are discussed. In addition to the paper published previously [M. Liu , Phys. Rev. Lett. 126, 206802 (2021)10.1103/PhysRevLett.126.206802], we present measurement results for the energy gap of the graphene sample, double the experimental data for the Casimir force, and perform a more complete theoretical analysis.
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DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
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A. Tureanu
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2017
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G. Bimonte
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发表时间:
2020
期刊:
The European Physical Journal C
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--
作者:
G. L. Klimchitskaya;V. Mostepanenko
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V. Mostepanenko
DOI:
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发表时间:
2014
期刊:
影响因子:
--
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G. L. Klimchitskaya;U. Mohideen;V. Mostepanenko
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V. Mostepanenko
DOI:
--
发表时间:
2003
期刊:
影响因子:
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