Even denominator fractional quantum Hall states in higher Landau levels of graphene

Y Kim, AC Balram, T Taniguchi, K Watanabe, JK Jain… - Nature Physics, 2019 - nature.com
An important development in the field of the fractional quantum Hall effect was the proposal
that the 5/2 state observed in the Landau level with orbital index n= 1 of two-dimensional …

Composite-fermion pairing at half-filled and quarter-filled lowest Landau level

A Sharma, AC Balram, JK Jain - Physical Review B, 2024 - APS
The Halperin-Lee-Read Fermi sea of composite fermions at half-filled lowest Landau level is
the realization of a fascinating metallic phase that is a strongly correlated “non-Fermi liquid” …

Fractional quantum Hall effect of partons and the nature of the 8/17 state in the zeroth Landau level of bilayer graphene

AC Balram, N Regnault - Physical Review B, 2024 - APS
We consider the fractional quantum Hall effect (FQHE) at the filling factor 8/17, where
signatures of incompressibility have been observed in the zeroth Landau level of bilayer …

Very-high-energy collective states of partons in fractional quantum hall liquids

AC Balram, Z Liu, A Gromov, Z Papić - Physical Review X, 2022 - APS
The low-energy physics of fractional quantum Hall (FQH) states—a paradigm of strongly
correlated topological phases of matter—to a large extent is captured by weakly interacting …

Fractional quantum Hall effect with unconventional pairing in monolayer graphene

A Sharma, S Pu, AC Balram, JK Jain - Physical review letters, 2023 - APS
Motivated by the observation of even denominator fractional quantum Hall effect in the n= 3
Landau level of monolayer graphene [Kim et al., Nat. Phys. 15, 154 (2019) NPAHAX 1745 …

Paired fermions in strong magnetic fields and daughters of even-denominator Hall plateaus

M Yutushui, M Hermanns, DF Mross - Physical Review B, 2024 - APS
Recent quantum Hall experiments have observed “daughter states” next to several plateaus
at half-integer filling factors in various platforms. These states were first proposed based on …

Prediction of a Non-Abelian Fractional Quantum Hall State with -Wave Pairing of Composite Fermions in Wide Quantum Wells

WN Faugno, AC Balram, M Barkeshli, JK Jain - Physical review letters, 2019 - APS
We theoretically investigate the nature of the state at the quarter filled lowest Landau level
and predict that, as the quantum well width is increased, a transition occurs from the …

Real-space entanglement spectra of parton states in fractional quantum Hall systems

A Anand, RA Patil, AC Balram, GJ Sreejith - Physical Review B, 2022 - APS
Real-space entanglement spectra (RSES) capture characteristic features of the topological
order encoded in the fractional quantum Hall (FQH) states. In this work, we numerically …

Fractional quantum Hall effect at

AC Balram, A Wójs - Physical Review Research, 2020 - APS
Motivated by two independent experiments revealing a resistance minimum at the Landau
level (LL) filling factor ν= 2+ 4/9, characteristic of the fractional quantum Hall effect (FQHE) …

A non-Abelian parton state for the fractional quantum Hall effect

A Coimbatore Balram - SciPost Physics, 2021 - scipost.org
Fascinating structures have arisen from the study of the fractional quantum Hall effect
(FQHE) at the even denominator fraction of $5/2$. We consider the FQHE at another even …