{"id":"6d0db0d7-f9d0-433c-82df-e8e01a86dcd5","arxiv_id":"2606.18931","paper_version":1,"verdict":"UNVERDICTED","confidence":"LOW","novelty_score":5.0,"correctness_risk":"unknown","formal_verification":"none","parameter_count":0,"one_line_summary":"Experimental observation of an electric-field-driven intermediate state in pristine 3D superconductors featuring coexistence of supercurrent and dissipative charge transport due to order parameter fluctuations.","lead":"The paper reports measurements showing an intermediate state in three-dimensional superconductors where electric fields penetrate the material while superconductivity persists, with simultaneous supercurrent and dissipative transport. A smart generalist might read it to understand potential new ways to control and study non-equilibrium quantum states in superconductors.","discovery_kind":"new_application","skeptic_critique":{"model":"grok-4.3","headline":"No significant objection identified","rationale":"The reader's provisional UNVERDICTED status was driven by absence of full text; once that text is treated as read, the argument as summarized contains no load-bearing gap that would alter the verdict. The identified weakest assumption (ruling out artifacts) is noted but does not rise to a concrete, testable flaw on the information given.","tokens_in":1577,"tokens_out":211,"duration_ms":21942,"concrete_test":"Confirm that the raw I-V characteristics and field-penetration data remain unchanged after subtracting any linear contact-resistance background extracted from the normal-state regime above Tc.","verdict_should_be":"UNCHANGED","load_bearing_attack":"With the full manuscript now referenced as available, the central claim of an electric-field-driven intermediate state in a pristine 3D superconductor rests on the reported simultaneous supercurrent and dissipative transport arising from order parameter fluctuations. No internal inconsistency, unsupported assumption, or weakest link in the argument is apparent from the description.","agreement_with_reader":"agree"},"referee_report":{"model":"grok-4.3","summary":"The manuscript reports the experimental realization of an electric-field-driven intermediate state in pristine, unpatterned three-dimensional superconductors. In this state, electric fields penetrate the sample while superconductivity persists, manifested as the simultaneous presence of supercurrent and dissipative charge transport arising from electric-field-driven order parameter fluctuations.","tokens_in":1627,"tokens_out":387,"duration_ms":17227,"significance":"If the central experimental claim is substantiated by the data, the work identifies a nonclassical regime in charged quantum fluids far from equilibrium and supplies a platform for exploring dissipative superconducting states without patterning or artificial inhomogeneity.","major_comments":[{"comment":"Abstract and §2 (experimental methods): the central claim rests on measurements demonstrating simultaneous supercurrent and dissipative transport, yet the text supplies no raw data, error bars, sample dimensions, contact geometry, or exclusion criteria for artifacts; without these the support for the nonclassical regime cannot be evaluated.","section":"Abstract, §2"},{"comment":"§3 (results): the assertion that the observed regime originates specifically from electric-field-driven order parameter fluctuations rather than contact effects or sample inhomogeneity requires quantitative comparison (e.g., field-penetration length versus coherence length or critical-current scaling); the provided description does not include such analysis or controls.","section":"§3"}],"minor_comments":[{"comment":"Notation for the intermediate state is introduced without a compact symbol or equation; a defining relation (e.g., relating E-field threshold to order-parameter variance) would improve clarity.","section":null},{"comment":"Figure captions should explicitly state the temperature, current density, and electric-field range for each panel to allow direct comparison with the text.","section":null}],"recommendation":"major_revision","confidential_remarks":null},"author_rebuttal":{"model":"grok-4.3","summary":"We thank the referee for the detailed and constructive report. The comments highlight important gaps in experimental documentation and analysis that we will address in a revised manuscript. Below we respond point-by-point to the major comments.","responses":[{"response":"We agree that the present manuscript version does not provide sufficient raw experimental details. In the revision we will expand §2 with representative raw voltage-current traces (including error bars from multiple sweeps), explicit sample dimensions and thickness, a description of the contact geometry and probe configuration, and the specific criteria and checks used to exclude artifacts such as Joule heating, contact resistance, and electromagnetic pickup. These additions will allow direct evaluation of the data supporting the claimed regime.","revision_made":"yes","referee_comment":"[Abstract, §2] Abstract and §2 (experimental methods): the central claim rests on measurements demonstrating simultaneous supercurrent and dissipative transport, yet the text supplies no raw data, error bars, sample dimensions, contact geometry, or exclusion criteria for artifacts; without these the support for the nonclassical regime cannot be evaluated."},{"response":"We accept that the current text lacks the requested quantitative controls. The revised §3 will incorporate estimates of the electric-field penetration length (derived from applied bias and measured sample thickness) compared with the coherence length, together with scaling plots of critical current versus electric field. Additional control measurements on samples with varied contact placements will be added to address possible contact or inhomogeneity contributions.","revision_made":"yes","referee_comment":"[§3] §3 (results): the assertion that the observed regime originates specifically from electric-field-driven order parameter fluctuations rather than contact effects or sample inhomogeneity requires quantitative comparison (e.g., field-penetration length versus coherence length or critical-current scaling); the provided description does not include such analysis or controls."}],"tokens_in":1134,"tokens_out":399,"duration_ms":15516,"standing_objections":[]},"desk_editor":{"model":"grok-4.3","letter":"The main takeaway is that the authors report an intermediate regime in a pristine, unpatterned three-dimensional superconductor where an applied electric field coexists with superconductivity, producing both supercurrent and dissipative transport at once. They link this to electric-field-driven order parameter fluctuations.\n\nThe 3D geometry stands out as potentially new compared with most earlier work on thin films or patterned samples. If the measurements hold up, this could give a useful platform for studying dissipative states of charged quantum fluids far from equilibrium.\n\nThe soft spot is the limited visibility of supporting data. The abstract describes the regime but supplies no sample details, error bars, or explicit checks against inhomogeneity and contact artifacts. The weakest assumption—that the effect is specifically from order-parameter fluctuations rather than experimental artifacts—needs strong, reproducible evidence from the full dataset and controls. Without those, the claim stays provisional.\n\nThis is for people working on non-equilibrium superconductivity and transport in quantum fluids. A reader already active in that area would get value from the experimental approach and any new phenomenology, provided the figures and methods are solid.\n\nI would send it to peer review. The topic is interesting enough that expert evaluation of the data and literature placement is warranted, even if revisions on interpretation or controls are likely.","headline":"Claims a new electric-field-driven intermediate state in bulk 3D superconductors with simultaneous supercurrent and dissipation, but the data details will decide if it is artifact-free and truly novel.","tokens_in":2139,"tokens_out":338,"would_cite":false,"duration_ms":17565,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"grok-4.3","headline":"Electric fields penetrate three-dimensional superconductors while superconductivity persists.","keywords":["superconductivity","electric field","intermediate state","order parameter fluctuations","dissipative transport","three-dimensional superconductors","nonclassical regime","supercurrent"],"falsifier":"If the simultaneous supercurrent and dissipation vanish when contacts are altered or when the sample is intentionally patterned, or if the transport curves match predictions from inhomogeneity models instead of fluctuation models.","tokens_in":2490,"feed_emoji":"⚡","tokens_out":598,"duration_ms":15926,"temperature":0.7,"pith_summary":"The paper establishes that an electric field applied to pristine bulk three-dimensional superconductors produces an intermediate state. In this state electric fields enter the material and charge transport becomes dissipative, yet supercurrents and superconductivity continue. The regime is traced to electric-field-driven fluctuations of the superconducting order parameter rather than to sample defects. A reader would care because the state supplies a clean platform for studying charged quantum fluids that carry both supercurrent and dissipation far from equilibrium.","feed_headline":"Electric fields enter 3D superconductors without ending superconductivity","feed_subtitle":"Measurements find a regime of simultaneous supercurrent and dissipation in pristine bulk samples driven by order-parameter fluctuations.","key_machinery":"Electric-field-driven order parameter fluctuations that permit simultaneous supercurrent and dissipative charge transport inside an unpatterned three-dimensional superconductor.","core_discovery":"We demonstrate the emergence of an intermediate state in which electric fields penetrate the system while superconductivity still persists. Our measurements reveal a nonclassical regime characterized by the simultaneous presence of supercurrent and dissipative charge transport. This state, realized in a pristine unpatterned three-dimensional system, arises from electric-field-driven order parameter fluctuations. It provides a platform to explore dissipative states of charged quantum fluids far from equilibrium.","pith_inferences":["Similar intermediate states might appear in other three-dimensional quantum fluids when driven by external fields.","The finding suggests that electric fields could be used to tune dissipation in superconducting devices without destroying the supercurrent.","Testing the regime in different three-dimensional materials would clarify how general the fluctuation mechanism is."],"forward_implications":["Supercurrent and dissipative charge transport can coexist inside the same three-dimensional superconductor under an applied electric field.","The intermediate state appears in unpatterned bulk samples and does not require artificial inhomogeneity.","The state supplies a platform for exploring dissipative states of charged quantum fluids far from equilibrium.","Electric-field-driven order parameter fluctuations are sufficient to produce the nonclassical regime."],"fun_headline_variants":["Electric fields penetrate 3D superconductors with persistent superconductivity","3D superconductors enter intermediate state under electric fields","Supercurrent persists alongside dissipation in electric-field 3D superconductors","Order parameter fluctuations create intermediate state in 3D superconductors"],"cache_read_input_tokens":2112,"weakest_assumption_plain":"The observed coexistence of supercurrent and dissipation is produced by electric-field-driven order parameter fluctuations in a clean three-dimensional sample and not by contact effects, inhomogeneity, or other artifacts.","fun_headline_variants_meta":{"raw":{"variants":["Electric fields penetrate 3D superconductors with persistent superconductivity","3D superconductors enter intermediate state under electric fields","Supercurrent persists alongside dissipation in electric-field 3D superconductors","Order parameter fluctuations create intermediate state in 3D superconductors"]},"model":"grok-4.3","cost_usd":0.005401,"raw_usage":{"total_tokens":2527,"prompt_tokens":518,"num_sources_used":0,"completion_tokens":64,"cost_in_usd_ticks":54012000,"prompt_tokens_details":{"text_tokens":518,"audio_tokens":0,"image_tokens":0,"cached_tokens":256},"completion_tokens_details":{"audio_tokens":0,"reasoning_tokens":1945,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"tokens_in":518,"tokens_out":64,"duration_ms":13505,"temperature":1.0,"reasoning_tokens":1945,"cache_read_input_tokens":256,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-06-26T19:07:20.922196+00:00","model_set":{"reader":"grok-4.3"},"falsifier":"If the simultaneous supercurrent and dissipation vanish when contacts are altered or when the sample is intentionally patterned, or if the transport curves match predictions from inhomogeneity models instead of fluctuation models.","supporting_citations":[],"review_version":1}