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Introducing an in-plane magnetic field into Josephson junctions is offundamental significance in exploring a variety of interesting physicalphenomena. However, extra care must be paid in realistic experiments involvingan in-plane magnetic field, because trivial orbital effect due to, e.g.,rippled structures can inevitably be introduced, which could produce falseeffect confusing the expected physical phenomena. In this work, we report adiamond-shaped evolution of the critical supercurrent in an in-plane magneticfield in NbTiN weak-link Josephson junctions. Upon application of an in-planemagnetic field perpendicular to the current, the superconducting interferencepattern exhibits a characteristic evolution, which manifests as a diamond blockdiagram featured with each node opened and stretched out in a V-shape,mimicking the suppression-recovery patterns of critical supercurrent related tothe Zeeman-driven 0-pi transition. However, the effect of Zeeman splittingplays a negligible role due to the relatively small magnetic field involved inour experiment. Therefore, we explore the trivial orbital effect of rippledstructures and further take into account non-uniform current distributionspertaining in our junctions. We find that the ripples in combination withspecific current distributions can give rise to a similar evolution pattern asthe experimental observations. Our results serve as a caution that the combinedeffect of rippled structures and non-homogeneous current distributions shouldbe taken seriously for experiments subjected by in-plane magnetic fields.

Diamond-shaped evolution of the superconducting interference pattern in NbTiN weak-link Josephson junctions