Single-Dot Spectroscopy via Elastic Single-Electron Tunneling through a Pair of Coupled Quantum Dots
نویسندگان
چکیده
منابع مشابه
Pair Tunneling through Single Molecules.
By a polaronic energy shift, the effective charging energy of molecules can become negative, favoring ground states with even numbers of electrons. Here we show that charge transport through such molecules near ground-state degeneracies is dominated by tunneling of electron pairs which coexists with (featureless) single-electron cotunneling. Because of the restricted phase space for pair tunnel...
متن کاملQuantum Theory of Electron Transport through Single-level Quantum Dot
Abstract. A new approach in the quantum theory of few-electron nanoelectronic devices – the S-matrix approach – is presented in a simple example: a single-electron transistor consisting of a single-level quantum dot connected with two metallic leads through the corresponding potential barriers. The electron transport through the quantum dot due to the electron tunneling between the dot and the ...
متن کامل5 . 3 Single - Electron Capacitance Spectroscopy : Study of Quantum Dots
We have extended our ultra-sensitive capacitance measurements to investigate several systems to which it is not feasible or desirable to make direct electrical contact. Specialized field-effect transistors (FETs) and single-electron transistors (SETs) sense electrical charge inside the semiconductor with noise evels from 10-2 to as a low as 10-5 electrons //H z, and the motion of single electro...
متن کاملEffect of asymmetric quantum dot rings in electron transport through a quantum wire
The electronic conductance at zero temperature through a quantum wire with side-connected asymmetric quantum ring (as a scatter system) is theoretically studied using the non-interacting Hamiltonian Anderson tunneling method. In this paper we concentrate on the configuration of the quantum dot rings. We show that the asymmetric structure of QD-scatter system strongly influences the amplitude an...
متن کاملWavelength modulation spectroscopy of single quantum dots
We demonstrate that external cavity diode lasers with large mode-hop-free tuning ranges ~up to 80 GHz! together with wavelength modulation spectroscopy can be used to study excitonic transitions in semiconductor nanostructures. Such transitions are characterized by homogeneous linewidths typically on the order of a few GHz. Wavelength modulation spectroscopy offers a high signal-to-noise method...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2004
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.93.066801