Transmission of heat modes across a potential barrier

Abstract

Controlling the transmission of electrical current using a quantum point contact constriction paved a way to a large variety of experiments in mesoscopic physics. The increasing interest in heat transfer in such systems fosters questions about possible manipulations of quantum heat modes that do not carry net charge(neutral modes). Here, we study the transmission of upstream neutral modes through a quantum point contact in fractional hole-conjugate quantum Hall states. Employing two different measurement techniques, we were able to render the relative spatial distribution of these chargeless modes with their charged counter-parts. In these states, which were found to harbor more than one downstream charge mode, the upstream neutral modes are found to flow with the inner charge mode - as theoretically predicted. These results unveil a universal upstream heat current structure and open the path for more complex engineering of heat flows and cooling mechanisms in quantum nano-electronic devices.

References in corpus (24)

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• Observation of half-integer thermal Hall conductance
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• Most efficient quantum thermoelectric at finite power output
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• 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
• Mach-Zehnder interferometry of fractional quantum Hall edge states
• Microscopic Study of Edge Excitations of Spin-Polarized and Spin-Unpolarized $\nu =2/3$ Fractional Quantum Hall Effect
• Neutral mode heat transport and fractional quantum Hall shot noise
• Universal non-equilibrium states at the fractional quantum Hall edge

Cited by in corpus (13)

• Incoherent transport on the $\nu =2/3$ quantum Hall edge
• Shot Noise in Mesoscopic Systems: from Single Particles to Quantum Liquids
• Synthesizing a Fractional v=2/3 State from Particle and Hole States
• Counter-propagating charge transport in the quantum Hall effect regime
• Contacts, equilibration, and interactions in fractional quantum Hall edge transport
• Edge Probes of Topological Order
• Energy relaxation in edge modes in the quantum Hall effect
• Transport in helical Luttinger liquids in the fractional quantum Hall regime
• Thermal Transport in One Dimensional Electronic Fluid
• Magnetic field dependent equilibration of fractional quantum Hall edge modes
• Symmetry-related transport on a fractional quantum Hall edge
• Plasmon localization and relaxation, and thermal transport in one-dimensional conductors
• Efficient heat-energy conversion from a non-thermal Tomonaga-Luttinger liquid