Coherent photogalvanic effect in fluctuating superconductors

Kovalev, V. M.; Sonowal, K.; Savenko, I. G.

doi:10.1103/physrevb.103.024513

Cited by 11 publications

(2 citation statements)

References 31 publications

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“…Yet, let us not jump to conclusions. Owing to the presence of SC fluctuations, a lot of intriguing physics occurs in superconductors above T c [18][19][20] , and this is of great interest specially in low-dimensional 21,22 and high T c superconductors 23,24 .…”

Section: Introductionmentioning

confidence: 99%

Magnetoplasmon resonance technique to monitor two-dimensional Dirac superconductors in fluctuating regime

Sonowal,

Kovalev,

Savenko

2021

Preprint

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We propose the magnetoplasmon resonance technique to investigate two-dimensional superconductors (taking MoS2 as an example) in the fluctuating regime, where the temperature is slightly above the critical temperature of the superconducting transition. Thus, unpaired electrons and fluctuating Cooper pairs coexist in the system and interact with each other via long-range Coulomb forces, forming a Bose-Fermi mixture. We expose the sample to external time-dependent electromagnetic field with a frequency in sub-terahertz range and a permanent magnetic field, and show that the magnetoplasmon response of the system is strongly modified in the presence of superconducting fluctuations in the vicinity of the superconducting transition. In particular, the fluctuating Cooper pairs dramatically change the position and broadening of the magnetoplasmon resonance, which is reflected in the optical response of the system.

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Section: Introductionmentioning

confidence: 99%

Magnetoplasmon resonance technique to monitor two-dimensional Dirac superconductors in fluctuating regime

Sonowal,

Kovalev,

Savenko

2021

Preprint

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“…Recently, the photo-induced transport phenomena have been actively studied in a new type of 2D systems based upon the monomolecular layers of transition metal dichalcogenides (TMD) [6][7][8] both in normal [9,10] and superconduction [11][12][13] regimes. As a typical example of TMD monolayer semiconductors, we will consider below the molybdenum disulfide (MoS 2 ).…”

Section: Introductionmentioning

confidence: 99%

Nonlinear circular valley photogalvanic effect

Entin,

Kovalev

2021

Preprint

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We develop a theory of circular photogalvanic effect in non-gyrotropic two-dimensional transition metal dichalcogenide monolayers under interband optical transitions. Oblique incidence of circularly-polarized electromagnetic field or normal incidence of elliptically polarized electromagnetic field is assumed. In contrast to the linear-in-intensity conventional photogalvanic effect, the effect considered here arises in the second intensity order. The effect is conditioned by i) the predominant population of the valleys by the circular in-plane electromagnetic field component and ii) the direct drift of the photo-excited carriers by the linear-polarized in-plane electromagnetic field component in the presence of trigonal valley asymmetry.

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Magnetoplasmon resonance in two-dimensional fluctuating superconductors

2021

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We develop a theory of the magnetoplasmon resonance (MPR) in two-dimensional superconductors in the fluctuating regime, where the temperature is slightly above the critical temperature of the superconducting transition. In this regime, unpaired electrons and fluctuating Cooper pairs coexist in the system and interact with each other via long-range Coulomb forces, forming a Bose–Fermi mixture. The sample is considered to be under the influence of an external time-dependent electromagnetic field with a frequency in sub-terahertz range and a permanent magnetic field. It is shown that the MPR of the system is strongly modified in the presence of superconducting fluctuations in the vicinity of the superconducting transition. In particular, the fluctuating Cooper pairs dramatically change the broadening of the MPR, which is reflected in the optical response of the system.

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Coherent photogalvanic effect in fluctuating superconductors

Cited by 11 publications

References 31 publications

Magnetoplasmon resonance technique to monitor two-dimensional Dirac superconductors in fluctuating regime

Magnetoplasmon resonance technique to monitor two-dimensional Dirac superconductors in fluctuating regime

Nonlinear circular valley photogalvanic effect

Magnetoplasmon resonance in two-dimensional fluctuating superconductors

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