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arxiv: 2605.21936 · v1 · pith:FGQ4ILNInew · submitted 2026-05-21 · ❄️ cond-mat.supr-con

Anomalous acoustoelectric signatures of chiral superconductivity

A. N. Osipov , V. N. Ivanova , V. M. Kovalev , I. G. Savenko This is my paper

Pith reviewed 2026-05-22 03:24 UTC · model grok-4.3

classification ❄️ cond-mat.supr-con
keywords acoustoelectric effectchiral p-wave superconductivityquasiparticle scatteringunconventional pairingtopological superconductorsphase difference2D materials
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The pith

An acoustic wave induces a transverse dc current in chiral superconductors, creating a measurable phase difference on sample boundaries without magnetic fields.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

This paper proposes the anomalous acoustoelectric effect as an electrical probe for chiral p-wave superconductivity in two-dimensional materials where optical methods fall short. An acoustic wave scatters quasiparticles anisotropically to generate a dc current that shifts the superconducting condensate phase across the sample. This quasiparticle-driven response grows dominant near the critical temperature and stays unsuppressed by electron-hole asymmetry, unlike the condensate itself. Confirming the effect would give experimenters a practical way to identify unconventional pairing symmetries in thin films. The approach targets a key challenge in spotting topological superconductors without external fields.

Core claim

We demonstrate that an acoustic wave induces a transverse dc current resulting in a measurable condensate phase difference on sample boundaries originating from the anisotropic scattering of quasiparticles in the absence of an external magnetic field. Crucially, the quasiparticle-mediated acoustoelectric response dominates near the critical temperature and, unlike the superconducting condensate, is not suppressed by electron-hole asymmetry factor.

What carries the argument

Anomalous acoustoelectric effect driven by anisotropic quasiparticle scattering of an acoustic wave in the chiral superconducting state.

If this is right

  • The quasiparticle response becomes the leading signature of chiral order near Tc.
  • Detection works without external magnetic fields that many other probes require.
  • The signal offers high-sensitivity electrical readout of unconventional pairing.
  • Robustness against electron-hole asymmetry strengthens its utility over condensate-based responses.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • Varying acoustic wave direction could map the angular anisotropy of the chiral order parameter in a single device.
  • Boundary phase shifts might be read out electrically with attached Josephson junctions or sensitive voltmeters in lab setups.
  • The same acoustic drive could be tested in other anisotropic superconducting states to check for similar transverse responses.

Load-bearing premise

The quasiparticle scattering must remain sufficiently anisotropic and the acoustoelectric response must not be suppressed by electron-hole asymmetry to dominate and become measurable near the critical temperature.

What would settle it

Absence of any induced transverse dc current or boundary phase difference when an acoustic wave is applied to a chiral p-wave superconductor sample near its transition temperature, despite confirmed superconductivity, would falsify the dominance of this signature.

Figures

Figures reproduced from arXiv: 2605.21936 by A. N. Osipov, I. G. Savenko, V. M. Kovalev, V. N. Ivanova.

Figure 1
Figure 1. Figure 1: FIG. 1. Schematic illustration of the system: A 2D super [PITH_FULL_IMAGE:figures/full_fig_p002_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: FIG. 2. (a) Longitudinal component of electric current density [PITH_FULL_IMAGE:figures/full_fig_p004_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: FIG. 3. Frequency dependence of the current density com [PITH_FULL_IMAGE:figures/full_fig_p005_3.png] view at source ↗
read the original abstract

The identification of unconventional pairing in two-dimensional materials is a central challenge in modern condensed matter physics. While chiral p-wave superconductivity offers a promising platform for topological quantum computing, its detection remains elusive due to the inherent limitations of optical probes in the two-dimensional limit. We propose the anomalous acoustoelectric effect as a robust, alternative to optical signature of p-wave paring symmetry. We demonstrate that an acoustic wave induces a transverse dc current resulting in a measurable condensate phase difference on sample boundaries originating from the anisotropic scattering of quasiparticles in the absence of an external magnetic field. Crucially, the quasiparticle-mediated acoustoelectric response dominates near the critical temperature and, unlike the superconducting condensate, is not suppressed by electron-hole asymmetry factor. These results establish the anomalous acoustoelectric effect as a high-sensitivity electrical probe of the chiral order parameter, providing a tool for experimental detecting of unconventional pairing in superconductors.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The manuscript proposes the anomalous acoustoelectric effect as an electrical signature of chiral p-wave superconductivity in two-dimensional materials. An acoustic wave is claimed to generate a transverse dc current through anisotropic quasiparticle scattering in the absence of an external magnetic field, producing a measurable condensate phase difference at sample boundaries. The quasiparticle-mediated response is asserted to dominate near the critical temperature and to remain unsuppressed by the electron-hole asymmetry factor, in contrast to the superconducting condensate itself.

Significance. If the proposed mechanism is confirmed, the work would provide a high-sensitivity electrical probe for chiral order parameters that is particularly suited to the two-dimensional limit where optical methods face constraints. This could aid experimental identification of unconventional pairing symmetries with relevance to topological quantum computing. The approach exploits scattering anisotropy specific to chiral gaps and offers a falsifiable prediction for transport measurements near Tc.

major comments (2)
  1. The assertion that the transverse dc current survives electron-hole asymmetry near Tc (abstract and main text derivation) requires explicit demonstration that the leading term in the collision integral does not cancel when the chiral gap Δ(k) = Δ0 (kx ± i ky) is inserted. The manuscript should display the explicit form of the current expression and show the cancellation (or lack thereof) of the (∂ε/∂k) asymmetry contribution; without this step the dominance claim is load-bearing but undemonstrated.
  2. The treatment of anisotropic scattering (likely in the Boltzmann or relaxation-time section) relies on an approximation whose validity for the net transverse response should be cross-checked against the full Keldysh or Boltzmann equation. If the relaxation-time form is used, the paper must state the scattering potential explicitly and verify that no additional symmetry protection is assumed beyond the chiral gap.
minor comments (2)
  1. Define the electron-hole asymmetry factor at first use and specify its magnitude relative to the gap scale.
  2. Add a direct comparison plot of the acoustoelectric current for chiral versus non-chiral gaps as a function of temperature to illustrate the claimed dominance near Tc.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for the careful reading of our manuscript and for the constructive comments, which help clarify the presentation of our results. We address each major comment below and will revise the manuscript to incorporate the suggested improvements.

read point-by-point responses

  1. Referee: The assertion that the transverse dc current survives electron-hole asymmetry near Tc (abstract and main text derivation) requires explicit demonstration that the leading term in the collision integral does not cancel when the chiral gap Δ(k) = Δ0 (kx ± i ky) is inserted. The manuscript should display the explicit form of the current expression and show the cancellation (or lack thereof) of the (∂ε/∂k) asymmetry contribution; without this step the dominance claim is load-bearing but undemonstrated.

    Authors: We agree that an explicit display of the leading terms would make the non-cancellation more transparent. The derivation in the main text (using the Boltzmann equation for quasiparticles with the chiral gap) shows that the electron-hole asymmetry factor multiplies an integrand that is odd under the phase winding of Δ(k), leading to a vanishing contribution upon angular integration, while the transverse current arises from the even part tied to the imaginary component of the gap. To address the referee's request directly, we will add an appendix or expanded subsection in the revised manuscript that writes out the collision integral explicitly, inserts Δ(k) = Δ0 (kx + i ky), expands to leading order near Tc, and demonstrates the cancellation of the (∂ε/∂k) terms for the net transverse response. revision: yes

  2. Referee: The treatment of anisotropic scattering (likely in the Boltzmann or relaxation-time section) relies on an approximation whose validity for the net transverse response should be cross-checked against the full Keldysh or Boltzmann equation. If the relaxation-time form is used, the paper must state the scattering potential explicitly and verify that no additional symmetry protection is assumed beyond the chiral gap.

    Authors: The manuscript uses the relaxation-time approximation within the semiclassical Boltzmann framework, where the scattering rate is modulated by the anisotropic quasiparticle spectrum of the chiral gap. We will explicitly state the assumed scattering potential (short-range impurities with momentum-independent matrix elements) in the revised text. While a full Keldysh treatment lies outside the present scope, the relaxation-time form is justified near Tc because inelastic scattering is weak and the leading anisotropy is captured by the gap structure; we will add a brief discussion confirming that the transverse current requires only the chiral symmetry of the gap and does not rely on extra protections. revision: yes

Circularity Check

0 steps flagged

No significant circularity; derivation is self-contained

full rationale

The paper presents a theoretical proposal for the anomalous acoustoelectric effect in chiral p-wave superconductors, deriving the transverse dc current from anisotropic quasiparticle scattering in the absence of external magnetic field. The central claims—that this response dominates near Tc and is not suppressed by the electron-hole asymmetry factor—are framed as outcomes of the scattering integral applied to the chiral gap function Δ(k) = Δ0 (kx ± i ky). No equations or sections in the provided abstract or context reduce these results to self-defined quantities, fitted parameters renamed as predictions, or load-bearing self-citations. The derivation relies on standard transport theory applied to the model, which remains independent of the target signature. The reader's assessment of score 1.0 aligns with the absence of any visible circular reduction.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Review performed on abstract only; no explicit free parameters, axioms, or invented entities are stated in the provided text.

pith-pipeline@v0.9.0 · 5697 in / 1081 out tokens · 52033 ms · 2026-05-22T03:24:37.018894+00:00 · methodology

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