<i>T<sub>c</sub></i> and Other Cuprate Properties in Relation to Planar Charges as Measured by NMR
Nuclear magnetic resonance (NMR) in cuprate research is a prominent bulk local probe of magnetic properties. NMR also, as was shown over the last years, actually provides a quantitative measure of local charges in the CuO<inline-formula><math display="inline"> <semantics>...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-07-01
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| Series: | Condensed Matter |
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| Online Access: | https://www.mdpi.com/2410-3896/4/3/67 |
| _version_ | 1798002734623883264 |
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| author | Michael Jurkutat Andreas Erb Jürgen Haase |
| author_facet | Michael Jurkutat Andreas Erb Jürgen Haase |
| author_sort | Michael Jurkutat |
| collection | DOAJ |
| description | Nuclear magnetic resonance (NMR) in cuprate research is a prominent bulk local probe of magnetic properties. NMR also, as was shown over the last years, actually provides a quantitative measure of local charges in the CuO<inline-formula><math display="inline"> <semantics> <msub> <mrow></mrow> <mn>2</mn> </msub> </semantics> </math> </inline-formula> plane. This has led to fundamental insights, e.g., that the maximum <inline-formula> <math display="inline"> <semantics> <msub> <mi>T</mi> <mi>c</mi> </msub> </semantics> </math> </inline-formula> is determined by the sharing of the parent planar hole between Cu and O. Using bonding orbital hole contents on planar Cu and O measured by NMR, instead of the total doping <i>x</i>, the thus defined two-dimensional cuprate phase diagram reveals significant differences between the various cuprate materials. Even more importantly, the reflected differences in material chemistry appear to set a number of electronic properties as we discuss here, for undoped, underdoped and optimally doped cuprates. These relations should advise attempts at a theoretical understanding of cuprate physics as well as inspire material chemists towards new high-<inline-formula><math display="inline"> <semantics> <msub> <mi>T</mi> <mi>c</mi> </msub> </semantics> </math> </inline-formula> materials. Probing planar charges, NMR is also sensitive to charge variations or ordering phenomena in the CuO<inline-formula><math display="inline"> <semantics> <msub> <mrow></mrow> <mn>2</mn> </msub> </semantics> </math> </inline-formula> plane. Thereby, local charge order on planar O in optimally doped YBCO could recently be proven. Charge density variations seen by NMR in both planar bonding orbitals with amplitudes between 1% to 5% appear to be omnipresent in the doped CuO<inline-formula><math display="inline"> <semantics> <msub> <mrow></mrow> <mn>2</mn> </msub> </semantics> </math> </inline-formula> plane, i.e., not limited to underdoped cuprates and low temperatures. |
| first_indexed | 2024-04-11T11:57:59Z |
| format | Article |
| id | doaj.art-ec66bec388b64965a59acb9cb77cde24 |
| institution | Directory Open Access Journal |
| issn | 2410-3896 |
| language | English |
| last_indexed | 2024-04-11T11:57:59Z |
| publishDate | 2019-07-01 |
| publisher | MDPI AG |
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| series | Condensed Matter |
| spelling | doaj.art-ec66bec388b64965a59acb9cb77cde242022-12-22T04:25:05ZengMDPI AGCondensed Matter2410-38962019-07-01436710.3390/condmat4030067condmat4030067<i>T<sub>c</sub></i> and Other Cuprate Properties in Relation to Planar Charges as Measured by NMRMichael Jurkutat0Andreas Erb1Jürgen Haase2Felix Bloch Institute for Solid State Physics, University of Leipzig, Linnéstr. 5, 04103 Leipzig, GermanyWalther Meissner Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, GermanyFelix Bloch Institute for Solid State Physics, University of Leipzig, Linnéstr. 5, 04103 Leipzig, GermanyNuclear magnetic resonance (NMR) in cuprate research is a prominent bulk local probe of magnetic properties. NMR also, as was shown over the last years, actually provides a quantitative measure of local charges in the CuO<inline-formula><math display="inline"> <semantics> <msub> <mrow></mrow> <mn>2</mn> </msub> </semantics> </math> </inline-formula> plane. This has led to fundamental insights, e.g., that the maximum <inline-formula> <math display="inline"> <semantics> <msub> <mi>T</mi> <mi>c</mi> </msub> </semantics> </math> </inline-formula> is determined by the sharing of the parent planar hole between Cu and O. Using bonding orbital hole contents on planar Cu and O measured by NMR, instead of the total doping <i>x</i>, the thus defined two-dimensional cuprate phase diagram reveals significant differences between the various cuprate materials. Even more importantly, the reflected differences in material chemistry appear to set a number of electronic properties as we discuss here, for undoped, underdoped and optimally doped cuprates. These relations should advise attempts at a theoretical understanding of cuprate physics as well as inspire material chemists towards new high-<inline-formula><math display="inline"> <semantics> <msub> <mi>T</mi> <mi>c</mi> </msub> </semantics> </math> </inline-formula> materials. Probing planar charges, NMR is also sensitive to charge variations or ordering phenomena in the CuO<inline-formula><math display="inline"> <semantics> <msub> <mrow></mrow> <mn>2</mn> </msub> </semantics> </math> </inline-formula> plane. Thereby, local charge order on planar O in optimally doped YBCO could recently be proven. Charge density variations seen by NMR in both planar bonding orbitals with amplitudes between 1% to 5% appear to be omnipresent in the doped CuO<inline-formula><math display="inline"> <semantics> <msub> <mrow></mrow> <mn>2</mn> </msub> </semantics> </math> </inline-formula> plane, i.e., not limited to underdoped cuprates and low temperatures.https://www.mdpi.com/2410-3896/4/3/67NMRcupratescharge order |
| spellingShingle | Michael Jurkutat Andreas Erb Jürgen Haase <i>T<sub>c</sub></i> and Other Cuprate Properties in Relation to Planar Charges as Measured by NMR Condensed Matter NMR cuprates charge order |
| title | <i>T<sub>c</sub></i> and Other Cuprate Properties in Relation to Planar Charges as Measured by NMR |
| title_full | <i>T<sub>c</sub></i> and Other Cuprate Properties in Relation to Planar Charges as Measured by NMR |
| title_fullStr | <i>T<sub>c</sub></i> and Other Cuprate Properties in Relation to Planar Charges as Measured by NMR |
| title_full_unstemmed | <i>T<sub>c</sub></i> and Other Cuprate Properties in Relation to Planar Charges as Measured by NMR |
| title_short | <i>T<sub>c</sub></i> and Other Cuprate Properties in Relation to Planar Charges as Measured by NMR |
| title_sort | i t sub c sub i and other cuprate properties in relation to planar charges as measured by nmr |
| topic | NMR cuprates charge order |
| url | https://www.mdpi.com/2410-3896/4/3/67 |
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