TY - JOUR

T1 - Capacitance and conductance of dots connected by quantum point contacts

AU - Flensberg, Karsten

PY - 1994/1/1

Y1 - 1994/1/1

N2 - We study the transport properties of quantum dots and quantum point contacts in the Coulomb blockade regime and in the limit where the quantum point contact has nearly fully transmitting channels. We argue that the properties of the charge fluctuations through the contact can be dealt with using a one-dimensional representation and study the scaling behavior of the model. We find a cross-over between a low-energy regime with Coulomb blockade to a high-energy regime where quantum charge fluctuations are dominant. The cross-over energy defines an effective charging energy given by U* ∼ U[1 - T] N 2, where U is the bare charging energy, T is the transmission coefficient, and N is the number of channels given by twice the number of quantum point contacts connected to the dot.

AB - We study the transport properties of quantum dots and quantum point contacts in the Coulomb blockade regime and in the limit where the quantum point contact has nearly fully transmitting channels. We argue that the properties of the charge fluctuations through the contact can be dealt with using a one-dimensional representation and study the scaling behavior of the model. We find a cross-over between a low-energy regime with Coulomb blockade to a high-energy regime where quantum charge fluctuations are dominant. The cross-over energy defines an effective charging energy given by U* ∼ U[1 - T] N 2, where U is the bare charging energy, T is the transmission coefficient, and N is the number of channels given by twice the number of quantum point contacts connected to the dot.

UR - http://www.scopus.com/inward/record.url?scp=43949157519&partnerID=8YFLogxK

U2 - 10.1016/0921-4526(94)90092-2

DO - 10.1016/0921-4526(94)90092-2

M3 - Journal article

AN - SCOPUS:43949157519

VL - 203

SP - 432

EP - 439

JO - Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics

JF - Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics

SN - 0921-4526

IS - 3-4

ER -