THE PUBLICATION ARCHIVE

Publications & preprints

Journal articles and preprints, in reverse chronological order. Each numbered entry gives the year, authors, publication status, and a link to the journal article or preprint.

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31 publications

[1]2026preprint

Exact solutions for kinematics across interaction-deformed Fermi surfaces

Alexander Kruchkov and F. Duncan M. Haldane

arXiv:2610.08921 · October 2026

Exact identities separate the redistribution of electronic occupation caused by a deforming Fermi surface from changes at fixed momentum, clarifying the role of Luttinger’s constraint.

[2]2025preprint

Quantum correlations curvature, memory functions, and fundamental bounds

Alexander Kruchkov

Preprint · arXiv:2512.18942

[3]2025preprint

Topological control of quantum speed limits

Alexander Kruchkov

Preprint · arXiv:2507.15950

[4]2025published

Bounds on entanglement entropy from quantum geometry

Alexander Kruchkov and Shinsei Ryu

Physical Review B 111, L241111

With Shinsei Ryu, relates the quantum metric to spatial entanglement and Chern-number bounds in gapped two-dimensional lattice systems within a Slater-determinant description.

[5]2024published

Measure of an ultranarrow topological gap via quantum noise

Alexander Kruchkov and Shinsei Ryu

Physical Review B 110, L041118

[6]2024published

Magneto-Thermoelectric Transport in Graphene Quantum Dot with Strong Correlations

Laurel E. Anderson, Antti Laitinen, Andrew Zimmerman, Thomas Werkmeister, Leyna Shackleton, Alexander Kruchkov, Takashi Taniguchi, Kenji Watanabe, Subir Sachdev, and Philip Kim

Physical Review Letters 132, 246502

Measures thermoelectric transport in graphene quantum dots, observing behavior consistent with predictions for the SYK regime.

[7]2023preprint

Spectral sum rules reflect topological and quantum-geometric invariants

Alexander Kruchkov and Shinsei Ryu

Preprint · arXiv:2312.17318

[8]2023published

Engineering SYK Interactions in Disordered Graphene Flakes under Realistic Experimental Conditions

Marta Brzezińska, Yifei Guan, Oleg V. Yazyev, Subir Sachdev, and Alexander Kruchkov

Physical Review Letters 131, 036503

Models a route from an interacting many-body theory to experimentally plausible graphene systems.

[9]2023preprint

Unconventional superfluidity and quantum geometry of topological bosons

Ilya Lukin, Andrii Sotnikov, and Alexander Kruchkov

Preprint · arXiv:2307.08748

[10]2023published

Quantum transport anomalies in dispersionless quantum states

Alexander Kruchkov

Physical Review B 107, L241102

Identifies geometric contributions to transport when band velocity vanishes, including a characteristic thermopower scale in a topological flat-band model.

[11]2023preprint

Anomalous conductivity of PT-symmetric Fermi liquids

Alexander Kruchkov

Preprint · arXiv:2305.17450

[12]2023published

Unconventional Flat Chern Bands and 2e Charges in Skyrmionic Moiré Superlattices

Yifei Guan, Oleg V. Yazyev, and Alexander Kruchkov

Nano Letters 23 (10), 4209–4215

[13]2022published

Reentrant magic-angle phenomena in twisted bilayer graphene in integer magnetic fluxes

Yifei Guan, Oleg V. Yazyev, and Alexander Kruchkov

Physical Review B 106, L121115

[14]2022published

Quantum geometry, flat Chern bands, and Wannier orbital quantization

Alexander Kruchkov

Physical Review B 105, L241102

[15]2020published

Thermoelectric power of Sachdev-Ye-Kitaev islands: Probing Bekenstein-Hawking entropy in quantum matter experiments

Alexander Kruchkov, Aavishkar A. Patel, Philip Kim, and Subir Sachdev

Physical Review B 101, 205148

[16]2020published

Ultraheavy and Ultrarelativistic Dirac Quasiparticles in Sandwiched Graphenes

Stephen Carr, Chenyuan Li, Ziyan Zhu, Efthimios Kaxiras, Subir Sachdev, and Alexander Kruchkov

Nano Letters 20 (5), 3030–3038

[17]2020published

Moiré Flat Bands in Twisted Double Bilayer Graphene

Fatemeh Haddadi, QuanSheng Wu, Alexander Kruchkov, and Oleg V. Yazyev

Nano Letters 20 (4), 2410–2415

[18]2020published

Non-Hermitian Boundary Modes and Topology

Dan S. Borgnia, Alexander Kruchkov, and Robert-Jan Slager

Physical Review Letters 124, 056802

[19]2019published

Magic angle hierarchy in twisted graphene multilayers

Eslam Khalaf, Alexander Kruchkov, Grigory Tarnopolsky, and Ashvin Vishwanath

Physical Review B 100, 085109

[20]2019published

Origin of Magic Angles in Twisted Bilayer Graphene

Grigory Tarnopolsky, Alexander Kruchkov, and Ashvin Vishwanath

Physical Review Letters 122, 106405

Introduces the Tarnopolsky–Kruchkov–Vishwanath chiral model, now a widely used theoretical framework for magic-angle graphene and correlated flat-band physics. Within this model, vanishing Dirac velocity implies an exactly flat band, revealing analytical structure behind the magic angles.

[21]2018published

In Situ Electric Field Skyrmion Creation in Magnetoelectric Cu2OSeO3

Ping Huang, Marco Cantoni, Alexander Kruchkov, Jayaraman Rajeswari, Arnaud Magrez, Fabrizio Carbone, and Henrik M. Rønnow

Nano Letters 18 (8), 5167–5171

[22]2018published

Electric-Field-Driven Topological Phase Switching and Skyrmion-Lattice Metastability in Magnetoelectric Cu2OSeO3

J. S. White, I. Živković, Alexander Kruchkov, M. Bartkowiak, A. Magrez, and H. M. Rønnow

Physical Review Applied 10, 014021

[23]2018published

Direct electric field control of the skyrmion phase in a magnetoelectric insulator

Alexander Kruchkov, J. S. White, M. Bartkowiak, I. Živković, A. Magrez, and H. M. Rønnow

Scientific Reports 8, 10466

[24]2018published

Laser-Induced Skyrmion Writing and Erasing in an Ultrafast Cryo-Lorentz Transmission Electron Microscope

G. Berruto, I. Madan, Y. Murooka, G. M. Vanacore, E. Pomarico, J. Rajeswari, R. Lamb, P. Huang, Alexander Kruchkov, Y. Togawa, T. LaGrange, D. McGrouther, H. M. Rønnow, and F. Carbone

Physical Review Letters 120, 117201

[25]2017preprint