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@article{WOS:001776257400001,
title = {Gate-Tunable Photoresponse of Graphene Josephson Junctions at Terahertz
Frequencies},
author = {Xiangyu Zhou and Igor Gayduchenko and Andrei Kudriashov and Kirill Shein and Anton Kuksov and Leonid Elesin and Mikhail Kravtsov and Artur Shilov and Olga Popova and Subhajit Jana and Kostya S Novoselov and Takashi Taniguchi and Kenji Watanabe and Gregory Goltsman and Denis A Bandurin},
doi = {10.1021/acs.nanolett.6c01483},
times_cited = {0},
issn = {1530-6984},
year = {2026},
date = {2026-06-01},
journal = {NANO LETTERS},
volume = {26},
number = {22},
pages = {7435-7442},
publisher = {AMER CHEMICAL SOC},
address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA},
abstract = {Graphene Josephson junctions (JJs) are promising platforms for broadband
quantum sensing because graphene combines frequency-independent
absorption, ultralow electronic heat capacity, and weak electron-phonon
coupling. While previous studies focused on microwave and infrared
regimes, the terahertz (THz) range-where highly sensitive quantum
detectors remain scarce-has largely remained unexplored. Here, we
demonstrate a gate-tunable THz photoresponse in graphene JJs.
Low-intensity THz illumination strongly suppresses the critical current,
generating a pronounced photovoltage under current bias. From
photovoltage measurements and independent electron thermometry, we
extract a responsivity of 88 kV W-1 and a noise-equivalent power of 45
aW Hz(-1/2) at 1.7 K. In addition, the hysteretic regime that persists
up to 0.9 K suggests a possible route toward single-photon THz detection
above millikelvin temperatures. Our results establish graphene JJs as
promising candidates for cryogenic THz quantum sensing.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{WOS:001775895800001,
title = {Enhanced Terahertz Thermoelectricity Via Engineered Van Hove
Singularities and Nernst Effect in Moiré Superlattices},
author = {Leonid Elesin and Arthur L Shilov and Subhajit Jana and Ilya Mazurenko and Pierre A Pantaleon and Mikhail Kashchenko and Nikita Krivovichev and Viacheslav Dremov and Igor Gayduchenko and Takashi Taniguchi and Kenji Watanabe and Yibo Wang and Kostya S Novoselov and Dmitry A Svintsov and Grigory Goltsman and Elena I Titova and Denis A Bandurin},
doi = {10.1002/adfm.202528325},
times_cited = {0},
issn = {1616-301X},
year = {2026},
date = {2026-05-01},
journal = {ADVANCED FUNCTIONAL MATERIALS},
publisher = {WILEY-V C H VERLAG GMBH},
address = {POSTFACH 101161, 69451 WEINHEIM, GERMANY},
abstract = {Thermoelectric materials, long explored for energy harvesting and
thermal sensing, convert heat directly into electrical signals.
Extending their application to the terahertz (THz) frequency range opens
opportunities for low-noise, bias-free THz detection, yet conventional
thermoelectrics lack the sensitivity required for practical devices.
Thermoelectric coefficients can be strongly enhanced near van Hove
singularities (VHS), though these are usually difficult to access in
conventional materials. Here it is shown that moir & eacute; band
engineering unlocks these singularities for THz optoelectronics. Using
graphene and bilayer graphene/hexagonal boron nitride (hBN) moir &
eacute; heterostructures as a model system, a pronounced enhancement of
the THz photothermoelectric response is observed when the Fermi level is
tuned to band-structure singularities. Applying a relatively small
magnetic field further boosts the response through the THz-driven Nernst
effect, a transverse thermoelectric current driven by the THz-induced
temperature gradient. These results establish moir & eacute;
superlattices as a versatile platform for THz thermoelectricity and
highlight engineered band structures as a route to high-performance THz
optoelectronic devices.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{WOS:001553737700001,
title = {Reconstructing critical current density in Josephson junctions with
phase nonlinearity},
author = {A Kudriashov and R A Hovhannisyan and X Zhou and L Elesin and L V Yashina and K S Novoselov and D A Bandurin},
doi = {10.1103/lgpj-wy72},
times_cited = {2},
issn = {2469-9950},
year = {2025},
date = {2025-08-01},
journal = {PHYSICAL REVIEW B},
volume = {112},
number = {6},
publisher = {AMER PHYSICAL SOC},
address = {ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA},
abstract = {In this Letter, we show that the standard Dynes-Fulton analysis,
commonly used to reconstruct the critical current density from
interference patterns, breaks down in Josephson junctions with nonlinear
phase distributions, leading to nonphysical artifacts. To address this,
we developed a simple iterative reconstruction algorithm and validated
it both numerically and experimentally using a planar Josephson junction
model. Unlike conventional approaches based on the logarithmic Hilbert
transform, the proposed method allows for incorporating prior knowledge
about the system and addresses the fundamental issue of ambiguity in
reconstructing the critical current density from interference patterns.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{WOS:001508114400008,
title = {Non-Majorana origin of anomalous current-phase relation and Josephson
diode effect in Bi2SE3/NbSe2 Josephson
junctions},
author = {Andrei Kudriashov and Xiangyu Zhou and Razmik A Hovhannisyan and Alexander S Frolov and Leonid Elesin and Yi Bo Wang and Ekaterina V Zharkova and Takashi Taniguchi and Kenji Watanabe and Zheng Liu and Kostya S Novoselov and Lada V Yashina and Xin Zhou and Denis A Bandurin},
doi = {10.1126/sciadv.adw6925},
times_cited = {11},
year = {2025},
date = {2025-06-01},
journal = {SCIENCE ADVANCES},
volume = {11},
number = {24},
publisher = {AMER ASSOC ADVANCEMENT SCIENCE},
address = {1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA},
abstract = {Josephson junctions (JJs) are key to superconducting quantum
technologies and the search for self-conjugate quasiparticles
potentially useful for fault-tolerant quantum computing. In topological
insulator (TI)-based JJs, measuring the current-phase relation (CPR) can
reveal unconventional effects such as Majorana bound states (MBS) and
nonreciprocal transport. However, reconstructing CPR as a function of
magnetic field has not been attempted. Here, we present a platform for
field-dependent CPR measurements in planar JJs made of NbSe2 and
few-layer Bi2Se3. When a flux quantum Phi 0 threads the junction, we
observe anomalous peak-dip CPR structure and nonreciprocal supercurrent
flow. We show that these arise from a nonuniform supercurrent
distribution that also leads to a robust and tunable Josephson diode
effect. Furthermore, despite numerous previous studies, we find no
evidence of MBS. Our results establish magnetic field-dependent CPR as a
powerful probe of TI-based superconducting devices and offer design
strategies for nonreciprocal superconducting electronics.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{WOS:001167173500001,
title = {Fundamental Limits of Few-Layer NbSe2 Microbolometers at
Terahertz Frequencies},
author = {Kirill Shein and Ekaterina Zharkova and Mikhail Kashchenko and Anna Kolbatova and Anastasia Lyubchak and Leonid Elesin and Ekaterina Nguyen and Alexander Semenov and Ilya Charaev and Andreas Schilling and Gregory Goltsman and Kostya S Novoselov and Igor Gayduchenko and Denis A Bandurin},
doi = {10.1021/acs.nanolett.3c04493},
times_cited = {13},
issn = {1530-6984},
year = {2024},
date = {2024-02-01},
journal = {NANO LETTERS},
volume = {24},
number = {7},
pages = {2282-2288},
publisher = {AMER CHEMICAL SOC},
address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA},
abstract = {The rapid development of infrared spectroscopy, observational astronomy,
and scanning near-field microscopy has been enabled by the emergence of
sensitive mid- and far-infrared photodetectors. Superconducting
hot-electron bolometers (HEBs), known for their exceptional
signal-to-noise ratio and fast photoresponse, play a crucial role in
these applications. While superconducting HEBs are traditionally crafted
from sputtered thin films such as NbN, the potential of layered van der
Waals (vdW) superconductors is untapped at THz frequencies. Here, we
introduce superconducting HEBs made from few-layer NbSe2 microwires. By
improving the interface between NbSe2 and metal leads, we overcome
impedance mismatch with RF readout, enabling large responsivity THz
detection (0.13 to 2.5 THz) with a minimal noise equivalent power of 7
pW/ root Hz and nanosecond-range response time. Our work highlights
NbSe2 as a promising platform for HEB technology and presents a reliable
vdW assembly protocol for custom bolometer production.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}