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Linear and nonlinear electrodynamic responses of bulk in the microwave regime
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View: Figures


Image of FIG. 1.
FIG. 1.

Microwave resistivity in the normal state for ( sample 1) at . The dotted line is a numerical fit for the expression . In this graph, . inset: a schematic drawing of the experimental setup, consisting of a copper cavity loaded by a single crystal sapphire (1), with the sample (2) placed in close proximity on the top of a dielectric “hot finger” (3), movable by using a micrometer screw (4).

Image of FIG. 2.
FIG. 2.

vs for sample 1 (엯) at . Data obtained for a Nb bulk sample at the same frequency are shown for comparison(▾). The hatched region indicates the sensitivity limit of the experimental setup. In the inset, vs is plotted below on a semilog scale for the same sample. The continuous line represents the exponential behavior predicted by the BCS theory with a strong coupling ratio .

Image of FIG. 3.
FIG. 3.

is shown at various temperatures for sample 1 at . In the inset, the IMD power and the surface resistance at as a function of the power circulating in the cavity are plotted for comparison.

Image of FIG. 4.
FIG. 4.

Nonlinear parameter (proportional to the IMD power) vs the reduced temperature for sample 2. Continuous and dashed line represents the temperature behavior for the nonlinear coefficient expected in the case of the standard -wave and -wave models respectively.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Linear and nonlinear electrodynamic responses of bulk CaC6 in the microwave regime