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Breakdown of semiclassical description of thermoelectricity in near-magic angle twisted bilayer graphene

Experiments on twisted bilayer graphene point to various interaction-induced phases, including the non-Fermi liquid, but its unambiguous assignment remains challenging. Here, using simultaneous transport and thermoelectric power measurements, the authors identify non-Fermi liquid signatures at low twist angle.

Bhaskar Ghawri
Phanibhusan S. Mahapatra
Arindam Ghosh
ResearchOpen Access21 Mar 2022
Nature Communications

Volume: 13, P: 1-7
Bottom–up-synthesized graphene nanoribbons for nanoelectronics

Graphene nanoribbons synthesized via bottom–up methods show great promise for nanoelectronics and quantum technologies. This Review highlights their synthesis, properties and device geometries, showcasing quantum transport phenomena and outlining challenges for future technologies.

Jian Zhang
Bhaskar Ghawri
Mickael L. Perrin
Reviews26 Jan 2026
Nature Reviews Materials

P: 1-19
Universality in quantum critical flow of charge and heat in ultraclean graphene

Critical behaviour is expected in graphene when the carrier density is tuned to the Dirac point. Now, universality associated with the critical point is observed in electronic and thermal transport.

Aniket Majumdar
Nisarg Chadha
Arindam Ghosh
Research13 Aug 2025
Nature Physics

Volume: 21, P: 1374-1379
Spin-orbit coupling-enhanced valley ordering of malleable bands in twisted bilayer graphene on WSe₂

Twisted bilayer graphene hosts a zoo of rich correlated electronic phases. Here, the authors explore the phase diagram of a twisted bilayer graphene/tungsten diselenide heterostructure and uncover a series of delicate Fermi surface reconstructions and signatures of orbital magnetism.

Saisab Bhowmik
Bhaskar Ghawri
U. Chandni
ResearchOpen Access08 Jul 2023
Nature Communications

Volume: 14, P: 1-8
Broken-symmetry states at half-integer band fillings in twisted bilayer graphene

Correlated insulating states are common in twisted bilayer graphene when the density of carriers is close to an integer per moiré unit cell. Now, such states emerge at half-integer fillings and show signs of being spin or charge density waves.

Saisab Bhowmik
Bhaskar Ghawri
U. Chandni
Research04 Apr 2022
Nature Physics

Volume: 18, P: 639-643
Electric field tunable bandgap in twisted double trilayer graphene

Mickael L. Perrin
Anooja Jayaraj
Jian Zhang
ResearchOpen Access27 Feb 2024
npj 2D Materials and Applications

Volume: 8, P: 1-8
Graphene functionalized field-effect transistors for ultrasensitive detection of Japanese encephalitis and Avian influenza virus

Akanksha Roberts
Neha Chauhan
Sonu Gandhi
ResearchOpen Access03 Sept 2020
Scientific Reports

Volume: 10, P: 1-12

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Breakdown of semiclassical description of thermoelectricity in near-magic angle twisted bilayer graphene

Bottom–up-synthesized graphene nanoribbons for nanoelectronics

Universality in quantum critical flow of charge and heat in ultraclean graphene

Spin-orbit coupling-enhanced valley ordering of malleable bands in twisted bilayer graphene on WSe2

Broken-symmetry states at half-integer band fillings in twisted bilayer graphene

Electric field tunable bandgap in twisted double trilayer graphene

Graphene functionalized field-effect transistors for ultrasensitive detection of Japanese encephalitis and Avian influenza virus

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Spin-orbit coupling-enhanced valley ordering of malleable bands in twisted bilayer graphene on WSe₂