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doctoral thesis
Pressure evolutions of electronic and crystal structures of europium compounds
Zagreb: University of Zagreb, Faculty of Science, 2024. urn:nbn:hr:217:189091
Dhami, Naveen Singh
University of Zagreb
Faculty of Science
Department of Physics

Institutional repository: Repository of the Faculty of Science

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Dhami, N. S. (2024). Pressure evolutions of electronic and crystal structures of europium compounds (Doctoral thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:189091

Dhami, Naveen Singh. "Pressure evolutions of electronic and crystal structures of europium compounds." Doctoral thesis, University of Zagreb, Faculty of Science, 2024. https://urn.nsk.hr/urn:nbn:hr:217:189091

Dhami, Naveen Singh. "Pressure evolutions of electronic and crystal structures of europium compounds." Doctoral thesis, University of Zagreb, Faculty of Science, 2024. https://urn.nsk.hr/urn:nbn:hr:217:189091

Dhami, N. S. (2024). 'Pressure evolutions of electronic and crystal structures of europium compounds', Doctoral thesis, University of Zagreb, Faculty of Science, accessed 27 November 2024, https://urn.nsk.hr/urn:nbn:hr:217:189091

Dhami NS. Pressure evolutions of electronic and crystal structures of europium compounds [Doctoral thesis]. Zagreb: University of Zagreb, Faculty of Science; 2024 [cited 2024 November 27] Available at: https://urn.nsk.hr/urn:nbn:hr:217:189091

N. S. Dhami, "Pressure evolutions of electronic and crystal structures of europium compounds", Doctoral thesis, University of Zagreb, Faculty of Science, Zagreb, 2024. Available at: https://urn.nsk.hr/urn:nbn:hr:217:189091

Metadata
TitlePressure evolutions of electronic and crystal structures of europium compounds
Title (croatian)Evolucije elektroničkih i kristalnih struktura spojeva europija u ovisnosti o tlaku
AuthorNaveen Singh Dhami
MentorYuki Utsumi Boucher (mentor)
Committee memberNeven Barišić (predsjednik povjerenstva)
Committee memberYuki Utsumi Boucher (član povjerenstva)
Committee memberMario Novak (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Physics)
Zagreb
Defense date and country2024-07-31, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Universal decimal classification
(UDC)		53 - Physics
Abstract
In this thesis, I present results of evolution of electronic and crystal structures of non-centrosymmetric EuTGe3 (T = Co, Rh and Ir) under hydrostatic pressure. Since the discovery of the first heavy-fermion superconductor CeCu2Si2, more than 30 systems have been discovered that exhibit unconventional f -electron superconductivity. Most of them belong to Ce and U compounds, and their phase diagrams are often discussed by using the Doniach model. The ground state is characterized by the competition between the Kondo effect and the Ruderman Kittel-Kasuya-Yosida (RKKY) interaction, which originates from the interaction of localized f -electrons with conduction electrons. The Kondo effect screens the magnetic moments, while the RKKY interactions stabilize the magnetic ordering. Superconductivity tends to appear near the magnetic quantum critical point (QCP). Recently, pressure induced heavy-fermion superconductors have been discovered among CeTX3 (T = Co, Rh, Ir; X = Si, Ge) with the BaNiSn3-type (I4mm) structure which does not possess inversion symmetry. They have attracted much attention due to the possible coexistence of spin-singlet and -triplet Cooper channels initiated by antisymmetric spin-orbit interaction as well as strong correlations.
Abstract (croatian)
U disertaciji su predstavljeni rezultati evolucije elektronske i kristalne strukture necentrosimetričnih EuTGe3 (T = Co, Rh i Ir) sustava pod hidrostatskim tlakom. Od otkrića prvog teškofermionskog supravodiča CeCu2Si2, otkriveno je više od 30 sustava koji pokazuju nekonvencionalnu f-elektronsku supravodljivost. Većina njih pripada spojevima Ce i U, a njihovi fazni dijagrami često se diskutiraju u okviru Doniachovog modela. Osnovno stanje karakterizirano je natjecanjem Kondo efekta i Ruderman-Kittel-Kasuya-Yosida (RKKY) interakcije. Obje interakcije proizlaze iz interakcije lokaliziranih f -elektrona s metaličnim elektronima. Kondo efekt zasjenjuje magnetske momente, dok RKKY interakcija stabilizira magnetsko uređenje. Supravodljivost se obično pojavljuje blizu magnetske kvantne kritične točke (QCP). Nedavno je otkrivena tlakom inducirana supravodljivost u teškofermionskom sustavu CeTX3 (T = Co, Rh, Ir; X = Si, Ge) s BaNiSn3-tipom (I4mm) strukture koja ne posjeduje inverzijsku simetrije. Ovi sustavi su privukli veliku pažnju zbog moguće koegzistencije spinsingletnih i -tripletnih Cooperovih kanala iniciranih antisimetričnom spin-orbit interakcijom, kao i jakim korelacijama.
Keywords
Keywords (croatian)
Languageenglish
URN:NBNurn:nbn:hr:217:189091
Promotion2024
Study programmeTitle: Doctoral study
Study programme type: university
Study level: postgraduate
Academic / professional title: doktor/doktorica znanosti u području prirodnih znanosti (doktor/doktorica znanosti u području prirodnih znanosti)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Public noteOvaj rad nastao je u okviru projekta HRZZ DOK-2018-09-9906.
Created on2024-09-09 11:53:24