Details
| Original language | English |
|---|---|
| Article number | 123017 |
| Journal | New journal of physics |
| Volume | 20 |
| Issue number | 12 |
| Publication status | Published - 18 Dec 2018 |
| Externally published | Yes |
Abstract
We study nanofriction in an ion Coulomb crystal under the presence of a topological defect. We have previously observed signatures of the pinning to sliding transition i.e. the symmetry breaking at the critical point and the existence of a vibrational soft mode. Here we discuss how they depend on the position of the topological defect and how external potentials, such as anharmonic trapping potentials or differential light pressure, can be used to change the defect position. The resulting forces tend to break the intrinsic crystal symmetry, thereby reducing mode softening near the transition. We show that the topological defect mode is sensitive to differential forces at the 10 -24 N level. We find that the local structure and position of the topological defect is essential for the presence of the soft mode and illustrate how the defect changes its properties, when it moves through the crystal.
Keywords
- Coulomb crystals, discrete solitons, nanofriction, topological defects, trapped ions
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: New journal of physics, Vol. 20, No. 12, 123017, 18.12.2018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Nanofriction and motion of topological defects in self-organized ion Coulomb crystals
AU - Kiethe, J.
AU - Nigmatullin, R.
AU - Schmirander, T.
AU - Kalincev, D.
AU - Mehlstaubler, T. E.
PY - 2018/12/18
Y1 - 2018/12/18
N2 - We study nanofriction in an ion Coulomb crystal under the presence of a topological defect. We have previously observed signatures of the pinning to sliding transition i.e. the symmetry breaking at the critical point and the existence of a vibrational soft mode. Here we discuss how they depend on the position of the topological defect and how external potentials, such as anharmonic trapping potentials or differential light pressure, can be used to change the defect position. The resulting forces tend to break the intrinsic crystal symmetry, thereby reducing mode softening near the transition. We show that the topological defect mode is sensitive to differential forces at the 10 -24 N level. We find that the local structure and position of the topological defect is essential for the presence of the soft mode and illustrate how the defect changes its properties, when it moves through the crystal.
AB - We study nanofriction in an ion Coulomb crystal under the presence of a topological defect. We have previously observed signatures of the pinning to sliding transition i.e. the symmetry breaking at the critical point and the existence of a vibrational soft mode. Here we discuss how they depend on the position of the topological defect and how external potentials, such as anharmonic trapping potentials or differential light pressure, can be used to change the defect position. The resulting forces tend to break the intrinsic crystal symmetry, thereby reducing mode softening near the transition. We show that the topological defect mode is sensitive to differential forces at the 10 -24 N level. We find that the local structure and position of the topological defect is essential for the presence of the soft mode and illustrate how the defect changes its properties, when it moves through the crystal.
KW - Coulomb crystals
KW - discrete solitons
KW - nanofriction
KW - topological defects
KW - trapped ions
UR - http://www.scopus.com/inward/record.url?scp=85059908448&partnerID=8YFLogxK
U2 - 10.1088/1367-2630/aaf3d5
DO - 10.1088/1367-2630/aaf3d5
M3 - Article
AN - SCOPUS:85059908448
VL - 20
JO - New journal of physics
JF - New journal of physics
SN - 1367-2630
IS - 12
M1 - 123017
ER -