Microwave Absorption of Surface-State Electrons on Liquid<sup>3</sup>He

Isshiki, Hanako; Konstantinov, Denis; Akimoto, Hikota; Shirahama, Keiya; Kono, Kimitoshi

doi:10.1143/jpsj.76.094704

Cited by 17 publications

(25 citation statements)

References 19 publications

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“…The dashed line shows the vapor-atom scattering scaled up by a factor of 1.6 in agreement with Isshiki et al [7].…”

Section: Temperature Dependent Linewidthsupporting

confidence: 88%

“…We now present an extended analysis of these experiments and, in particular, unpublished results on the temperature dependence of the resonance frequency f21(T) in comparison with recent theory. Isshiki et al [7] measured the microwave absorption for electrons on liquid 3 He from 0.01 to 1 K, with some experiments on liquid 4 He. Further microwave experiments have explored non-linear effects in electrons on helium [8,9,10,11,12].…”

Section: Introductionmentioning

confidence: 99%

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Temperature-dependent energy levels of electrons on liquid helium

et al. 2017

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We present measurements of the resonant microwave absorption between the Rydberg energy levels of surface state electrons on the surface of superfluid liquid helium, in the frequency range 165 -220 GHz. The resonant frequency was temperature dependent. The experiments are in agreement with recent theoretical calculations of the renormalisation of the electron energy levels due to zero-point and thermal ripplons. The temperature-dependent contribution to the linewidth γ(T) for excitation to the first excited state at 189.6 GHz is compared with other measurements and theoretical predictions. PACS number(s): 73.50.Fq

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“…The dashed line shows the vapor-atom scattering scaled up by a factor of 1.6 in agreement with Isshiki et al [7].…”

Section: Temperature Dependent Linewidthsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Temperature-dependent energy levels of electrons on liquid helium

et al. 2017

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“…The experimental procedure for microwave absorption measurements was similar to that described in Ref. 7. The power of the microwave radiation that passed through the cell was measured with an InSb bolometer mounted inside the cryostat.…”

Section: Methodsmentioning

confidence: 99%

“…7. For T = 0.4 K the intrinsic linewidth of the absorption spectrum is rather small and the observed lineshape is determined by the inhomogeneous broadening due to the nonuniformity of the electric field at the helium surface as well as the nonuniformity of the microwave field 7,23 . As expected, for low radiation power the quadrature component of the absorption signal is zero.…”

Section: B Absorption Measurementsmentioning

confidence: 98%

Bistability and hysteresis of intersubband absorption in strongly interacting electrons on liquid helium

Konstantinov

Dykman²,

Lea

et al. 2012

Phys. Rev. B

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We study nonlinear inter-subband microwave absorption of electrons bound to the liquid helium surface. Already for a comparatively low radiation intensity, resonant absorption due to transitions between the two lowest subbands is accompanied by electron overheating. The overheating results in a significant population of higher subbands. The Coulomb interaction between electrons causes a shift of the resonant frequency, which depends on the population of the excited states and thus on the electron temperature Te. The latter is determined experimentally from the electron photoconductivity. The experimentally established relationship between the frequency shift and Te is in reasonable agreement with the theory. The dependence of the shift on the radiation intensity introduces nonlinearity into the rate of the inter-subband absorption resulting in bistability and hysteresis of the resonant response. The hysteresis of the response explains the behavior in the regime of frequency modulation, which we observe for electrons on liquid 3 He and which was previously seen for electrons on liquid 4 He.

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“…The pristine nature of the substrate allowed for the first observation [5] of the Wigner crystallization in electron gas at a low density [6,7]. For studies of electron states at the surface microwave spectroscopic techniques [2] are developed [8][9][10][11] with recent advances on intersubband absorption [11], excitations of high-energy Rydberg states [4], relaxation times [9], and coupling with the superconducting resonance cavity [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Annular confinement for electrons on liquid helium

Szafran

2021

Preprint

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We discuss annular confinement for electrons on liquid helium surface induced by a tubular electrode submerged beneath the surface. For shallow liquid layer above the tube the resulting potential has a minimum off the axis of the tube. The symmetry transitions in the ground-state driven by external magnetic field can be resolved by the microwave spectroscopy provided that the confinement radii in the first and second Rydberg subbands of the vertical quantization are different. This condition can be fulfilled for submersion depth of the tube comparable to its radius. Then, discontinuities in the main absorption line appear with the period that corresponds to the subsequent magnetic flux quanta passing across the area within the ground-state confinement radius.

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Microwave Absorption of Surface-State Electrons on Liquid³He

Cited by 17 publications

References 19 publications

Temperature-dependent energy levels of electrons on liquid helium

Temperature-dependent energy levels of electrons on liquid helium

Bistability and hysteresis of intersubband absorption in strongly interacting electrons on liquid helium

Annular confinement for electrons on liquid helium

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Microwave Absorption of Surface-State Electrons on Liquid3He

Cited by 17 publications

References 19 publications

Temperature-dependent energy levels of electrons on liquid helium

Temperature-dependent energy levels of electrons on liquid helium

Bistability and hysteresis of intersubband absorption in strongly interacting electrons on liquid helium

Annular confinement for electrons on liquid helium

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Product

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Microwave Absorption of Surface-State Electrons on Liquid³He