Equilibration of quantum Hall edge states by an Ohmic contact

Article Article scientifique Article Equilibration of quantum Hall edge states by an Ohmic contact eng 2013 author Slobodeniuk Artur 779638 author Levkivskyi Ivan 665894 author Sukhorukov Eugene 134361 10.1103/PhysRevB.88.165307 1098-0121 Ohmic contacts are crucial elements of electron optics that have not received a clear theoretical description yet. We propose a model of an Ohmic contact as a piece of metal of the finite capacitance C attached to a quantum Hall edge. It is shown that charged quantum Hall edge states may have weak coupling to neutral excitations in an Ohmic contact. Consequently, despite being a reservoir of neutral excitations, an Ohmic contact is not able to efficiently equilibrate edge states if its temperature is smaller than ℏΩc, where Ωc is the inverse RC time of the contact. This energy scale for a floating contact may become as large as the single-electron charging energy e2/C Dewey 500.2 37 Département de physique théorique 133 false Physical review. B, Condensed matter and materials physics 88 16 9a6efbc9-4e8d-4fe5-be90-c9b3c6238875 Article (Published version) Public Sukhorukov2.pdf 217035 application/pdf openAccess Faculté des sciences / Section de physique / Département de physique théorique

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Equilibration of quantum Hall edge states by an Ohmic contact	Physical review. B, Condensed matter and materials physics			2013	642	523

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Slobodeniuk, Artur