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Title: Imaging anisotropic vortex dynamics in FeSe

Journal Article · · Physical Review. B
 [1];  [1];  [1];  [2];  [1];  [1];  [2];  [3];  [4];  [4]
  1. Stanford Univ., CA (United States). Dept. of Applied Physics, and Inst. for Materials and Energy Sciences
  2. Stanford Univ., CA (United States). Department of Physics, and Inst. for Materials and Energy Sciences
  3. Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials
  4. Stanford Univ., CA (United States). Dept. of Applied Physics, and Inst. for Materials and Energy Sciences; Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials

Strong vortex pinning in FeSe could be useful for technological applications and could provide clues about the coexistence of superconductivity and nematicity. To characterize the pinning of individual, isolated vortices, we simultaneously apply a local magnetic field and image the vortex motion with scanning SQUID susceptibility. We find that the pinning is highly anisotropic: the vortices move easily along directions that are parallel to the orientations of twin domain walls and pin strongly in a perpendicular direction. These results are consistent with a scenario in which the anisotropy arises from vortex pinning on domain walls and quantify the dynamics of individual vortex pinning in FeSe.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1560640
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 2 Vol. 100; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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