Research output: Contribution to journal › Article › peer-review
Particle Collisions and Negative Nonlocal Response of Ballistic Electrons. / Shytov, Andrey; Kong, Jian Feng; Falkovich, Gregory et al.
In: Physical Review Letters, Vol. 121, No. 17, 176805, 26.10.2018.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Particle Collisions and Negative Nonlocal Response of Ballistic Electrons
AU - Shytov, Andrey
AU - Kong, Jian Feng
AU - Falkovich, Gregory
AU - Levitov, Leonid
N1 - Publisher Copyright: © 2018 American Physical Society.
PY - 2018/10/26
Y1 - 2018/10/26
N2 - An electric field that builds in the direction against current, known as negative nonlocal resistance, arises naturally in viscous flows and is thus often taken as a telltale of this regime. Here, we predict negative resistance for the ballistic regime, wherein the ee collision mean free path is greater than the length scale at which the system is being probed. Therefore, negative resistance alone does not provide strong evidence for the occurrence of the hydrodynamic regime; it must thus be demoted from the rank of irrefutable evidence to that of a mere forerunner. Furthermore, we find that negative response is log enhanced in the ballistic regime by the physics related to the seminal Dorfman-Cohen log divergence due to memory effects in the kinetics of dilute gases. The ballistic regime therefore offers a unique setting for exploring these interesting effects due to electron interactions.
AB - An electric field that builds in the direction against current, known as negative nonlocal resistance, arises naturally in viscous flows and is thus often taken as a telltale of this regime. Here, we predict negative resistance for the ballistic regime, wherein the ee collision mean free path is greater than the length scale at which the system is being probed. Therefore, negative resistance alone does not provide strong evidence for the occurrence of the hydrodynamic regime; it must thus be demoted from the rank of irrefutable evidence to that of a mere forerunner. Furthermore, we find that negative response is log enhanced in the ballistic regime by the physics related to the seminal Dorfman-Cohen log divergence due to memory effects in the kinetics of dilute gases. The ballistic regime therefore offers a unique setting for exploring these interesting effects due to electron interactions.
KW - RESISTANCE
KW - GRAPHENE
KW - FLOW
UR - http://www.scopus.com/inward/record.url?scp=85055715122&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.121.176805
DO - 10.1103/PhysRevLett.121.176805
M3 - Article
C2 - 30411935
AN - SCOPUS:85055715122
VL - 121
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 17
M1 - 176805
ER -
ID: 17248606