Impact of isoelectronic substitution and hydrostatic pressure on the quantum critical properties of CeRhSi3

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10415154" target="_blank" >RIV/00216208:11320/20:10415154 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=.imCGLyuEV" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=.imCGLyuEV</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-648X/aba015" target="_blank" >10.1088/1361-648X/aba015</a>

Result language
angličtina
Original language name
Impact of isoelectronic substitution and hydrostatic pressure on the quantum critical properties of CeRhSi3
Original language description
There is an ongoing dispute in the community about the absence of a magnetic quantum critical point (QCP) in the noncentrosymmetric heavy fermion compound CeRhSi3. In order to explore this question we prepared single crystals of CeRh(Si1-xGex)(3)withx= 0.05 and 0.15 and determined the temperature-pressure (T-p) phase diagram by means of measurements of the electrical resistivity. The substitution of isoelectronic but large Ge enforces a lattice volume increase resulting in a weakening of the Kondo interaction. As a result, thex= 0.05 andx= 0.15 compound exhibit a transition into the antiferromagnetic (AFM) at higher temperatures beingT(N)= 4.7 K andT(N1)= 19.7 K, respectively. Application of pressure suppressesT(N)(T-N1) monotonically and pressure induced superconductivity is observed in both Ge-substituted compounds abovep > 2.16 GPa (x= 0.05) andp > 2.93 GPa (x= 0.15). Extrapolation ofT(N)(p) -> 0 of CeRh(Si0.95Ge0.05)(3)yields a critical pressure ofp(c)approximate to 3.4 GPa (in CeRh(Si0.85Ge0.15)(3) p(c)approximate to 3.5 GPa) pointing to the presence of an AFM QCP located deep inside the superconducting state.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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