Universal Nonequilibrium I-V Curve at an Interacting Impurity Quantum Critical Point
dc.contributor.author | Zhang, G | |
dc.contributor.author | Chung, C-H | |
dc.contributor.author | Ke, CT | |
dc.contributor.author | Lin, C-Y | |
dc.contributor.author | Mebrahtu, H | |
dc.contributor.author | Smirnov, AI | |
dc.contributor.author | Finkelstein, G | |
dc.contributor.author | Baranger, HU | |
dc.date.accessioned | 2019-12-22T00:41:51Z | |
dc.date.available | 2019-12-22T00:41:51Z | |
dc.date.issued | 2016-09 | |
dc.date.updated | 2019-12-22T00:41:48Z | |
dc.description.abstract | The nonlinear I-V curve at an interacting quantum critical point (QCP) is typically out of reach theoretically. Here, however, we provide an analytical calculation of the I-V curve at a QCP under nonequilibrium conditions and, furthermore, present experimental results to which the theory is compared. The system is a quantum dot coupled to resistive leads: a spinless resonant level interacting with an ohmic electromagnetic environment. A two channel Kondo like QCP occurs when the level is on resonance and symmetrically coupled to the leads. Though similar to a resonant level in a Luttinger liquid, a key difference enables us to obtain the current at finite temperature and bias: because there are modes that do not initially couple to the environment, an analysis in terms of weak backscattering of non-interacting fermions coupled to a modified environment is possible. Drawing on dynamical Coulomb blockade theory, we then obtain an analytical expression for the nonlinear I-V curve. The agreement between our theoretical and experimental results is remarkable. | |
dc.identifier.uri | ||
dc.publisher | American Physical Society | |
dc.relation.ispartof | arXiv | |
dc.subject | Condensed Matter - Mesoscale and Nanoscale Physics | |
dc.subject | Condensed Matter - Strongly Correlated Electrons | |
dc.title | Universal Nonequilibrium I-V Curve at an Interacting Impurity Quantum Critical Point | |
dc.type | Journal article | |
duke.contributor.orcid | Finkelstein, G|0000-0002-0883-0741 | |
duke.contributor.orcid | Baranger, HU|0000-0002-1458-2756 | |
pubs.organisational-group | Trinity College of Arts & Sciences | |
pubs.organisational-group | Duke | |
pubs.organisational-group | Physics | |
pubs.organisational-group | Duke Institute for Brain Sciences | |
pubs.organisational-group | University Institutes and Centers | |
pubs.organisational-group | Institutes and Provost's Academic Units | |
pubs.publication-status | Published online | |
pubs.volume | 1609 |
Files
Original bundle
- Name:
- Zhang_Chung_Ke_Lin_Mebrahtu_Smirnov_Finkelstein_Baranger_2019_arXiv1609.04765 [cond-mat]_Universal Nonequilibrium I-V Curve at an Interacting Impurity Quantum Critical.pdf
- Size:
- 2.11 MB
- Format:
- Adobe Portable Document Format