Author: Mendez, C.A.    [Méndez, C.A.]
Paper Title Page
MOPMB053 Theoretical Study of Thin Noble-Metal Films on the Niobium Surface 230
SUSPB021   use link to see paper's listing under its alternate paper code  
 
  • C.A. Méndez, T. Arias, M. Liepe, N. Sitaraman
    Cornell University, Ithaca, New York, USA
  
  Funding: The Center for Bright Beams, Supported by National Science Foundation award No. PHY-1549132
Re­cent ex­per­i­ments sug­gest that no­ble-metal de­po­si­tion on nio­bium metal sur­faces can re­move the sur­face oxide and ul­ti­mately im­prove su­per­con­duct­ing ra­dio-fre­quency (SRF) cav­i­ties per­for­mance. In this pre­lim­i­nary study, we use den­sity-func­tional the­ory to in­ves­ti­gate the po­ten­tial for no­ble-metal pas­si­va­tion of re­al­is­tic, poly­crys­talline nio­bium sur­faces for SRF. Specif­i­cally, we in­ves­ti­gate the sta­bil­ity of gold and pal­la­dium mono­lay­ers on nio­bium sur­faces with dif­fer­ent crys­tal ori­en­ta­tions and eval­u­ate the im­pact of these im­pu­ri­ties on su­per­con­duct­ing prop­er­ties. In par­tic­u­lar, our re­sults sug­gest that gold can grow in thin lay­ers on the nio­bium sur­face, whereas pal­la­dium rather tends to dis­solve into the nio­bium cav­ity. These re­sults will help in­form on­go­ing ex­per­i­men­tal ef­forts to pas­si­vate nio­bium sur­faces of SRF cav­i­ties. 		 
DOI • reference for this paper ※ doi:10.18429/JACoW-SRF2023-MOPMB053  
About • Received ※ 22 June 2023 — Revised ※ 24 June 2023 — Accepted ※ 19 August 2023 — Issue date ※ 19 August 2023
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