Enhanced thermoelectric response in the fractional quantum Hall effect

Abstract

We study the linear thermoelectric response of a quantum dot embedded in a constriction of a quantum Hall bar with fractional filling factors nu=1/m within Laughlin series. We calculate the figure of merit ZT for the maximum efficiency at a fixed temperature difference. We find a significant enhancement of this quantity in the fractional filling in relation to the integer-filling case, which is a direct consequence of the fractionalization of the electron in the fractional quantum Hall state. We present simple theoretical expressions for the Onsager coefficients at low temperatures, which explicitly show that ZT and the Seebeck coefficient increase with m.

5 pages, 4 figures, suplemental material

References in corpus (9)

• An On-Demand Coherent Single Electron Source
• Quantum limit of heat flow across a single electronic channel
• Violation of the Wiedemann-Franz Law in a Single-Electron Transistor
• Tuning Energy Relaxation along Quantum Hall Channels
• Chiral thermoelectrics with quantum Hall edge states
• Extracting net current from an upstream neutral mode in the fractional quantum Hall regime
• Thermoelectric probe for neutral edge modes in the fractional quantum Hall regime
• Nonlinear spin-thermoelectric transport in two-dimensional topological insulators
• Probing the neutral edge modes in transport across a point contact via thermal effects in the Read-Rezayi non-abelian quantum Hall states

Cited by in corpus (15)

• Thermoelectric power of Sachdev-Ye-Kitaev islands: Probing Bekenstein-Hawking entropy in quantum matter experiments
• Phenomenological theory of heat transport in the fractional quantum Hall effect
• Quantifying nonequlibrium thermodynamic operations in a multiterminal mesoscopic system
• Heat current across a capacitively coupled double quantum dot for high magnetic field
• Enhancing of nonlinear thermoelectric response of a correlated quantum dot in the Kondo regime by asymmetrically coupling to the leads
• Optimal thermoelectricity with quantum spin-Hall edge states
• Phase-coherent caloritronics with ordinary and topological Josephson junctions
• Helical spin thermoelectrics controlled by a side-coupled magnetic quantum dot in the quantum spin Hall state
• Enhanced performance of a quantum-dot-based nanomotor due to Coulomb interactions
• Quantum thermodynamics of nanoscale thermoelectrics and electronic devices
• Thermoelectricity in Quantum-Hall Corbino Structures
• Detailed study of nonlinear cooling with two-terminal configurations of topological edge states
• Thermoelectric cooling properties of a quantum Hall Corbino device
• Efficient heat-energy conversion from a non-thermal Tomonaga-Luttinger liquid
• Controlled generation and detection of a thermal bias in Corbino devices under the quantum Hall regime