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The spin\u2013orbit interaction is assumed to be non-vanishing on the molecule and negligible in the reservoirs (leads). The band structure of the molecule features four helical modes with spin-momentum locking that are analogous of edge-currents in the quantum spin Hall effect. While charge is conserved and therefore the charge current is independent of where it is measured\u2014reservoirs or molecule\u2014our detailed calculations reveal that the spin currents in the left and right leads are equal in magnitudes but with opposite signs (in linear response). We predict that transport currents flowing through helical molecules are accompanied by a spin accumulation in the contact region with the same magnetization direction for source and drain. Furthermore, we predict that the spin-conductance can be extracted directly from measuring the (quasi-static) spin accumulation\u2014rather than the spin current itself, which is very challenging to obtain experimentally.<\/jats:p>","DOI":"10.1063\/5.0226594","type":"journal-article","created":{"date-parts":[[2024,9,5]],"date-time":"2024-09-05T10:37:38Z","timestamp":1725532658000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":6,"title":["Spin conductances and magnetization production in chiral molecular junctions"],"prefix":"10.1063","volume":"161","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4949-4147","authenticated-orcid":false,"given":"Richard","family":"Koryt\u00e1r","sequence":"first","affiliation":[{"name":"Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University 1 , Ke Karlovu 5, 12116 Praha 2, Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0381-0132","authenticated-orcid":false,"given":"Jan M.","family":"van Ruitenbeek","sequence":"additional","affiliation":[{"name":"Huygens-Kamerlingh Onnes Laboratory, Leiden University 2 , NL-2333CA Leiden, The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1343-1662","authenticated-orcid":false,"given":"Ferdinand","family":"Evers","sequence":"additional","affiliation":[{"name":"Institute of Theoretical Physics, University of Regensburg 3 , D-93050 Regensburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"317","published-online":{"date-parts":[[2024,9,5]]},"reference":[{"key":"2024090510310645000_c1","doi-asserted-by":"publisher","first-page":"035001","DOI":"10.1103\/revmodphys.92.035001","article-title":"Advances and challenges in single-molecule electron transport","volume":"92","year":"2020","journal-title":"Rev. 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