Distrontium ruthenate: Difference between revisions

Revision as of 12:18, 10 August 2023

Latest revision as of 21:24, 19 June 2025

(15 intermediate revisions by 10 users not shown)

Line 1:

{{Chembox

| ImageFile = Sr_2_Ru_O_4_Layered_Perovskite_Structure.svg

| ImageSize = 240px

| ImageAlt = strontium ruthenate unit cell

| ImageCaption = The unit cell of the layered perovskite structure of strontium ruthenate. Ruthenium ions are red, strontium ions are blue, and oxygen ions are green.

| IUPACName =

| OtherNames =

| Section1 = {{Chembox Identifiers

| CASNo =60862-59-1

| CASNo_Ref = {{cascite|correct|CAS}}

| PubChem =

| SMILES = [Sr+2].[Sr+2].[O-][Ru+4]([O-])([O-])[O-]

| StdInChI=1S/4O.Ru.2Sr/q4*-1;+4;2*+2

| StdInChIKey=KWNWXODLYNPAJR-UHFFFAOYSA-N

}}

| Section2 = {{Chembox Properties

| Formula = Sr₂RuO₄

| MolarMass =

Line 22:

| BoilingPt =

| Solubility = }}

| Section3 = {{Chembox Hazards

| MainHazards =

| FlashPt =

| AutoignitionPt = }}

| Section4 = {{Chembox Structure

| Structure_ref = <ref>{{cite journal | last1=Lichtenberg | first1=F. | last2=Catana | first2=A. | last3=Mannhart | first3=J. | last4=Schlom | first4=D. G. | title=Sr₂RuO₄: A metallic substrate for the epitaxial growth of YBa₂Cu₃O_7−δ | journal=Applied Physics Letters | publisher=AIP Publishing | volume=60 | issue=9 | date=1992-03-02 | issn=0003-6951 | doi=10.1063/1.106432 | pages=1138–1140}}</ref>

| CrystalStruct = K₂NiF₄ structure (body-centered tetragonal)

Line 51:

==Superconductivity==

Superconductivity in SRO was first observed by Yoshiteru Maeno et al. Unlike the cuprate superconductors, SRO displays superconductivity in the absence of [[Doping (semiconductor)|doping]].<ref name=Rev/> The superconducting [[order parameter]] in SRO exhibits signatures of [[time-reversal symmetry]] breaking,<ref name=kapitulnik2009>{{cite journal|author1first1=Aharon |last1=Kapitulnik|author2first2=Jing |last2=Xia |author3=Elizabeth Schemm Alexander Palevski |title=Polar Kerr effect as probe for time-reversal symmetry breaking in unconventional superconductors|journal=New Journal of Physics|date=May 2009|volume=11|doi=10.1088/1367-2630/11/5/055060|arxiv = 0906.2845 |bibcode = 2009NJPh...11e5060K|issue=5|pages=055060 |s2cid=43924082}}</ref> and hence, it can be classified as an [[unconventional superconductor]].

Sr₂RuO₄ is believed to be a fairly two-dimensional system, with superconductivity occurring primarily on the Ru-O plane. The electronic structure of Sr₂RuO₄ is characterized by three bands derived from the Ru t_2g 4d orbitals, namely, α, β and γ bands, of which the first is hole-like while the other two are electron-like. Among them, the γ band arises mainly from the d_xy orbital, while the α and β bands emerge from the hybridization of d_xz and d_yz orbitals. Due to the two-dimensionality of Sr₂RuO₄, its [[Fermi surface]] consists of three nearly two-dimensional sheets with little dispersion along the crystalline c-axis and that the compound is nearly magnetic.<ref>{{cite journal | last1=Mazin | first1=I. I. | last2=Singh | first2=David J. | title=Ferromagnetic Spin Fluctuation Induced Superconductivity in Sr₂RuO₄ | journal=Physical Review Letters | publisher=American Physical Society (APS) | volume=79 | issue=4 | date=1997-07-28 | issn=0031-9007 | doi=10.1103/physrevlett.79.733 | pages=733–736| arxiv=cond-mat/9703068 | bibcode=1997PhRvL..79..733M | s2cid=119434737 }}</ref>

Line 59:

T_c seems to increase under uniaxial compression<ref>{{cite journal|last1=Steppke|first1=Alexander|last2=Zhao|first2=Lishan|last3=Barber|first3=Mark E.|last4=Scaffidi|first4=Thomas|last5=Jerzembeck|first5=Fabian|last6=Rosner|first6=Helge|last7=Gibbs|first7=Alexandra S.|last8=Maeno|first8=Yoshiteru|last9=Simon|first9=Steven H.|last10=Mackenzie|first10=Andrew P.|last11=Hicks|first11=Clifford W.|date=2017-01-12|title=Strong peak in T_c of Sr₂RuO₄ under uniaxial pressure|url=http://pure-oai.bham.ac.uk/ws/files/102786770/Hicks_2017_Science.pdf|journal=Science|publisher=American Association for the Advancement of Science (AAAS)|volume=355|issue=6321|page=eaaf9398|doi=10.1126/science.aaf9398|issn=0036-8075|pmid=28082534|hdl-access=free|hdl=10023/10113|s2cid=8197509}}</ref> that pushes the [[van Hove singularity]] of the d_xy orbital across the Fermi level.<ref>{{Cite journal|last1=Sunko|first1=Veronika|last2=Abarca Morales|first2=Edgar|last3=Marković|first3=Igor|last4=Barber|first4=Mark E.|last5=Milosavljević|first5=Dijana|last6=Mazzola|first6=Federico|last7=Sokolov|first7=Dmitry A.|last8=Kikugawa|first8=Naoki|last9=Cacho|first9=Cephise|last10=Dudin|first10=Pavel|last11=Rosner|first11=Helge|date=2019-08-19|title=Direct observation of a uniaxial stress-driven Lifshitz transition in Sr₂RuO₄|url=https://www.nature.com/articles/s41535-019-0185-9|journal=npj Quantum Materials|language=en|volume=4|issue=1|page=46|doi=10.1038/s41535-019-0185-9 | arxiv=1903.09581 |bibcode=2019npjQM...4...46S|s2cid=85459284|issn=2397-4648}}</ref>

Evidence was reported for ''p''-wave singlet state as in cuprates and conventional superconductors, instead of the conjectured more unconventional ''p''-wave [[triplet state]].<ref>{{Cite journal|last1=Chronister|first1=Aaron|last2=Pustogow|first2=Andrej|last3=Kikugawa|first3=Naoki|last4=Sokolov|first4=Dmitry A.|last5=Jerzembeck|first5=Fabian|last6=Hicks|first6=Clifford W.|last7=Mackenzie|first7=Andrew P.|last8=Bauer|first8=Eric D.|last9=Brown|first9=Stuart E.|date=2021-06-22|title=Evidence for even parity unconventional superconductivity in Sr₂RuO₄|journal=Proceedings of the National Academy of Sciences|language=en|volume=118|issue=25|doi=10.1073/pnas.2025313118 |pmc=8237678|issn=0027-8424|pmid=34161272|arxiv=2007.13730|bibcode=2021PNAS..11825313C|doi-access=free }}</ref><ref>{{Cite journal|last=Lopatka|first=Alex|date=2021-08-05|title=An unconventional superconductor isn't so odd after all|journal=Physics Today|volume=2021|issue=1 |pages=0805a|url=https://physicstoday.scitation.org/do/10.1063/PT.6.1.20210805a/abs/|language=en|doi=10.1063/PT.6.1.20210805a|bibcode=2021PhT..2021a.805. |s2cid=241654779|url-access=subscription}}</ref> It has also been suggested that Strontium ruthenate superconductivity could be due to a [[Fulde–Ferrell–Larkin–Ovchinnikov phase]].<ref>{{Cite journal |last1=Kinjo |first1=K. |last2=Manago |first2=M. |last3=Kitagawa |first3=S. |last4=Mao |first4=Z. Q. |last5=Yonezawa |first5=S. |last6=Maeno |first6=Y. |last7=Ishida |first7=K. |date=2022-04-22 |title=Superconducting spin smecticity evidencing the Fulde-Ferrell-Larkin-Ovchinnikov state in Sr 2 RuO 4 |url=https://www.science.org/doi/10.1126/science.abb0332 |journal=Science |language=en |volume=376 |issue=6591 |pages=397–400 |doi=10.1126/science.abb0332 |pmid=35446631 |bibcode=2022Sci...376..397K |s2cid=248322696 |issn=0036-8075|url-access=subscription }}</ref><ref>{{Cite journal |date=2022-06-13 |title=Magnetic field induces spatially varying superconductivity |url=https://physicstoday.scitation.org/do/10.1063/PT.6.1.20220613a/full |journal=Physics Today |language=en |volume=2022 |issue=1 |pages=0613a |doi=10.1063/PT.6.1.20220613a|bibcode=2022PhT..2022a.613. |s2cid=249659408 |last1=Hill |first1=Heather M. |url-access=subscription }}</ref>

Strontium ruthenate behaves as a conventional [[Fermi liquid]] at temperatures below 25 K.<ref>{{cite book|last=Yanoff|first=Brian|title=Temperature dependence of the penetration depth in the unconventional superconductor Sr₂RuO₄|year=2000|publisher=University of Illinois at Urbana-Champaign|url=http://groups.mrl.uiuc.edu/dvh/theses/yanoff.pdf|access-date=2012-04-16|archive-date=2012-09-16|archive-url=https://web.archive.org/web/20120916164016/http://groups.mrl.uiuc.edu/dvh/theses/yanoff.pdf|url-status=dead}}</ref>

In [[2023]], a team of researchers from the [[University of Illinois Urbana-Champaign]] observedconfirmed the 67-year-old prediction of [[David Pines' Demon|Pines' demon]] excitation for the first time in any material within Sr₂RuO₄.<ref>{{cite journal |last1=Abbamonte |first1=Peter |title=Pines’Pines' demon observed as a 3D acoustic plasmon in Sr2RuO4 |journal=[[Nature (journal)|Nature]] |date=August 9, 2023 |volume=45 |issue=7977 |pages=66–70 |doi=10.1038/s41586-023-06318-8 |urlpmid=https://www37558882 |pmc=10482684 |bibcode=2023Natur.nature621.com/articles/s41586-023-06318-8..66H |doi-access-date=Augustfree 10, 2023}}</ref>

== See also ==

* [[Uranium ditelluride]]

* [[Dicalcium ruthenate]]

==References==

Line 73 ⟶ 74:

==Further reading==

*{{cite journal |last=Armitage |first=N. Peter |title=Superconductivity mystery turns 25 |journal=Nature |date=9 December 2019 |volume=576 |issue=7787 |pages=386–387 |doi=10.1038/d41586-019-03734-7|pmid=31844256 |doi-access=free |arxiv=2006.06916 }}

*{{cite web|last=Wooten|first=Rachel|title=Strontium Ruthenate|url=https://docs.google.com/viewer?a=v&q=cache:DgnknpjYbx4J:sces.phys.utk.edu/~dagotto/condensed/HW2_2008/Strontium_Ruthenate.ppt+&hl=en&gl=us&pid=bl&srcid=ADGEESjZ7iZGRQSADAb7Z1s_9eAna1xiWVss132uKFgZzdWLT0aMoimFedsvEYqudjD3jQQnZj0ttTougqs1felMdAWruV20EbFHDcoyabxp8gHZE7bmi1WI28B0Y5qLzU42RqJuuJwO&sig=AHIEtbTQVVf6y8oDl63wDTUkXKH9NrNEug&pli=1|publisher=University of Tennessee-Knoxville|access-date=16 April 2012}}<

*{{cite journal|author1first1=Yoshiteru |last1=Maeno|author2first2=Maurice |last2=Rice |author3first3=Manfred |last3=Sigrist |title=The intriguing superconductivity of Strontium Ruthenate|journal=Physics Today|year=2001|volume=54|issue=1|doi=10.1063/1.1349611|url=http://www.physics.mcmaster.ca/~imai/PhysicsToday_2001.pdf|access-date=16 April 2012|bibcode = 2001PhT....54a..42M|pages=42 |hdl=2433/49957 |doi-access=free}}

*{{cite journal|author1first1=Yoshiteru |last1=Maeno|author2first2=H. |last2=Hashimoto |title=Superconductivity in a layered perovskite without copper|journal=Nature|year=1994|volume=372|pages=532–534|doi=10.1038/372532a0|bibcode = 1994Natur.372..532M|issue=6506 |s2cid=4303356|display-authors=etal}}

*{{cite journal|last1 = Perry|first1 = R.|last2 = Kitagawa|first2 = K.|last3 = Grigera|first3 = S.|last4 = Borzi|first4 = R.|last5 = MacKenzie|first5 = A.|last6 = Ishida|first6 = K.|last7 = Maeno|first7 = Y.|s2cid = 26241456|title = Multiple First-Order Metamagnetic Transitions and Quantum Oscillations in Ultrapure Sr.₃Ru₂O₇|journal = Physical Review Letters|volume = 92|date = 2004|doi = 10.1103/PhysRevLett.92.166602|pmid = 15169251|bibcode=2004PhRvL..92p6602P|arxiv = cond-mat/0401371|issue = 16|pages = 166602}}

*{{cite journal|last1 = Shlyk|first1 = Larysa|last2 = Kryukov|first2 = Sergiy|last3 = Schüpp-Niewa|first3 = Barbara|last4 = Niewa|first4 = Rainer|last5 = De Long|first5 = Lance E.|title = High-Temperature Ferromagnetism and Tunable Semiconductivity of (Ba, Sr)M_2±xRu_4∓xO₁₁ (M = Fe, Co): A New Paradigm for Spintronics|journal = Advanced Materials|volume = 20|page = 1315|date = 2008|doi = 10.1002/adma.200701951|issue = 7| bibcode=2008AdM....20.1315S |s2cid = 136558050}}

{{Strontium compounds}}

Line 82 ⟶ 85:

[[Category:Strontium compounds]]

[[Category:Ruthenium(IV) compoundsRuthenates]]

[[Category:Transition metal oxides]]

[[Category:Superconductors]]