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title = {{Positive and negative Coulomb drag in vertically integrated one-dimensional quantum wires}},  journal = {Nature Nanotech},  }  @article{Yamamoto_2012,  doi = {10.1103/physrevb.85.041308},  url = {http://dx.doi.org/10.1103/physrevb.85.041308},  year = {2012},  month = {jan},  publisher = {American Physical Society ({APS})},  volume = {85},  number = {4},  author = {M. Yamamoto and H. Takagi and M. Stopa and S. Tarucha},  title = {{Hydrodynamic rectified drag current in a quantum wire induced by Wigner crystallization}},  journal = {Physical Review B},  }