Electron-phonon scattering in quantum point contacts

Abstract

We study the negative correction to the quantized value $2e^2/h$ of the conductance of a quantum point contact due to the backscattering of electrons by acoustic phonons. The correction shows activated temperature dependence and also gives rise to a zero-bias anomaly in conductance. Our results are in qualitative agreement with recent experiments studying the 0.7 feature in the conductance of quantum point contacts.

4 pages, no figures

References in corpus (12)

• Possible Spin Polarization in a One-Dimensional Electron Gas
• The Low-Temperature Fate of the 0.7 Structure in a Point Contact: A Kondo-like Correlated State in an Open System
• Interaction Effects in a One-Dimensional Constriction
• Kondo model for the "0.7 anomaly" in transport through a quantum point contact
• Bias and temperature dependence of the 0.7 conductance anomaly in Quantum Point Contacts
• Large-q asymptotics of the random bond Potts model
• Many-body spin related phenomena in ultra-low-disorder quantum wires
• The anomalous 0.5 and 0.7 conductance plateaus in quantum point contacts
• Ferromagnetic correlations in quasi-one-dimensional conducting channels
• Coulomb Blockade Resonances in Quantum Wires
• Possible mechanism of the fractional conductance quantization in a one-dimensional constriction
• Acoustoelectric effects in quantum constrictions

Cited by in corpus (20)

• Spontaneous spin polarization in quantum point contacts
• Conductance of a quantum wire at low electron density
• A double-dot quantum ratchet driven by an independently biased quantum point contact
• What lurks below the last plateau: Experimental studies of the 0.7 x 2e^2/h conductance anomaly in one-dimensional systems
• Phenomenological model for the 0.7 conductance feature in quantum wires
• Effects of short-range interactions on transport through quantum point contacts: A numerical approach
• Transport properties of partially equilibrated quantum wires
• Spin coupling in zigzag Wigner crystals
• Conductance of a single-atom carbon chain with graphene leads
• Electron-electron interaction effects in quantum point contacts
• 0.7 Structure and Zero Bias Anomaly in Ballistic Hole Quantum Wires
• The influence of device geometry on many-body effects in quantum point contacts: Signatures of the 0.7 anomaly, exchange and Kondo
• Transport in partially equilibrated inhomogeneous quantum wires
• Zero-bias Anomaly of Quantum Point Contacts in the Low-Conductance Limit
• Conductance quantization in etched Si/SiGe quantum point contacts
• Electronic transport in inhomogeneous quantum wires
• Magnetic Moment Formation in Quantum Point Contacts
• Shot noise reduction in quantum wires with "0.7 structure"
• Nuclear magnetic resonance probes for the Kondo scenario for the 0.7 feature in semiconductor quantum point contact devices
• Kinetic processes in Fermi-Luttinger liquids