Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session B16: Emerging Superconductors: Optical and Microwave Responses
11:30 AM–1:54 PM,
Monday, March 4, 2024
Room: M100G
Sponsoring
Unit:
DCMP
Chair: Myoung-Hwan Kim, Texas Tech University
Abstract: B16.00009 : Microwave investigation of Higgs Mode in a superconducting wires.
1:06 PM–1:18 PM
Presenter:
Laurine M Marian
(Universite de Sherbrooke)
Author:
Laurine M Marian
(Universite de Sherbrooke)
Collaboration:
Bertrand Reulet Edouard Pinsolle Christian Lupien Gabriel Laliberte
Observation of Higgs modes in superconductors have been performed in the THz
range [3]. A study in the microwave range could enable new measurement such as non-local conductivity to probe its propagation.
We studied Titanium samples for which 2Δ is of the order of 10-30 GHz and we studied different samples corresponding to different limits of superconductivity.
In this experiment we present a precise and quantitative measurement of the high frequency complex impedance of a
superconducting wire in the microwave range. In the absence of DC current, we compare our results with Mattis Bardeen theory at equilibrium. With current we observe a feature at frequency 2Δ which behaves as predicted in [2] with a width much larger than expected.
Furthermore, in the spirit of integrating Higgs mode in electronic circuit, we designed an experiment where a measurement in tranmission is made; the Higgs mode is propagated/stopped when the current is turned on/off.
[1] Anderson PW. 1958. Phys. Rev. 112:1900–16
[2] A. Moor and al., Amplitude Higgs Mode and Admittance in Superconductors with
a Moving Condensate, PRL 118, 047001 (2017)).
[3] Matsunaga R, Hamada YI, Makise K, Uzawa Y, Terai H, et al. 2013. Phys. Rev. Lett. 111:057002
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