منابع مشابه
Carbon nanotube quantum resistors
The conductance of multiwalled carbon nanotubes (MWNTs) was found to be quantized. The experimental method involved measuring the conductance of nanotubes by replacing the tip of a scanning probe microscope with a nanotube fiber, which could be lowered into a liquid metal to establish a gentle electrical contact with a nanotube at the tip of the fiber. The conductance of arc-produced MWNTs is o...
متن کاملSpin transport across carbon nanotube quantum dots
We investigate linear and nonlinear transport in interacting single-wall carbon nanotubes (SWCNTs) that are weakly attached to ferromagnetic leads. For the reduced density matrix of a SWCNT quantum dot, equations of motion which account for an arbitrarily vectored magnetisation of the contacts are derived. We focus on the case of large diameter nanotubes where exchange effects emerging from sho...
متن کاملPhonon runaway in carbon nanotube quantum dots
Phonon runaway in carbon nanotube quantum dots" (2008). Other Nanotechnology Publications. Paper 93. We explore electronic transport in a nanotube quantum dot strongly coupled with vibrations and weakly with leads and the thermal environment. We show that the recent observation of anomalous conductance signatures in single-walled carbon nanotube quantum dots ͓B. can be understood quantitatively ...
متن کاملQuantum light from a carbon nanotube
Carbon nanotubes provide a unique paradigm for mesoscopic physics [1]: while strong one-dimensional (1D) confinement enhanced Coulomb interactions lead to striking new phenomena such as spin-charge separation, absence of spin-orbit and hyperfine interactions promise ultra-long electron spin coherence for applications in quantum information processing. Since the first observation of photolumines...
متن کاملCotunneling renormalization in carbon nanotube quantum dots
We determine the level shifts induced by cotunneling in a Coulomb blockaded carbon nanotube quantum dot using leading-order quasidegenerate perturbation theory within a single nanotube “shell.” It is demonstrated that otherwise degenerate and equally tunnel coupled K and K ′ states are mixed by cotunneling and therefore split up in energy except at the particle-hole-symmetric midpoints of the C...
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ژورنال
عنوان ژورنال: Science
سال: 1998
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.280.5370.1744