Shi, Y;
James, AJA;
Demler, E;
Klich, I;
(2017)
Auxiliary fermion approach to the resonant inelastic x-ray scattering response in an underdoped cuprate.
Physical Review B
, 96
(15)
, Article 155101. 10.1103/PhysRevB.96.155101.
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Abstract
We describe a method for calculating the resonant inelastic x-ray scattering (RIXS) response—including the dynamics of the transient core hole—of many-body systems with nontrivial gap structure encoded in their single particle Green's function. Our approach introduces auxiliary fermions in order to obtain a form amenable to the determinant method of Benjamin et al., [Phys. Rev. Lett. 112, 247002 (2014)], and is applicable to systems where interactions are most strongly felt through a renormalization of the single particle propagator. As a test case we consider the Yang-Rice-Zhang ansatz for cuprate phenomena in the underdoped “pseudogap” regime, which remains a popular tool for interpreting the results of experimental probes. We show that taking the core hole dynamics into account for a system described by this ansatz pushes the RIXS peaks towards higher energy transfer, improving agreement with experiments.
| Type: | Article |
|---|---|
| Title: | Auxiliary fermion approach to the resonant inelastic x-ray scattering response in an underdoped cuprate |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.96.155101 |
| Publisher version: | https://doi.org/10.1103/PhysRevB.96.155101 |
| Language: | English |
| Additional information: | This is the published version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10026206 |
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