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Title: Quasiparticle interference, quasiparticle interactions, and the origin of the charge density wave in 2 H NbSe 2

Journal Article · · Physical Review Letters
 [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [3];  [1];  [4];  [5];  [1]
  1. Columbia Univ., New York, NY (United States)
  2. Princeton Univ., Princeton, NJ (United States)
  3. Univ. of Minnesota, Minneapolis, MN (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. Columbia Univ., New York, NY (United States); Princeton Univ., Princeton, NJ (United States)

We show that a small number of intentionally introduced defects can be used as a spectroscopic tool to amplify quasiparticle interference in 2H-NbSe₂ that we measure by scanning tunneling spectroscopic imaging. We show, from the momentum and energy dependence of the quasiparticle interference, that Fermi surface nesting is inconsequential to charge density wave formation in 2H-NbSe₂. We demonstrate that, by combining quasiparticle interference data with additional knowledge of the quasiparticle band structure from angle resolved photoemission measurements, one can extract the wave vector and energy dependence of the important electronic scattering processes thereby obtaining direct information both about the fermiology and the interactions. In 2H-NbSe₂, we use this combination to confirm that the important near-Fermi-surface electronic physics is dominated by the coupling of the quasiparticles to soft mode phonons at a wave vector different from the charge density wave ordering wave vector.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704; FG 02-04-ER-46157; FG02-98ER45706; SC0012336; AC02-98CH10886
OSTI ID:
1182502
Alternate ID(s):
OSTI ID: 1181309
Report Number(s):
BNL-107408-2015-JA; PRLTAO; R&D Project: PO016; KC0202020
Journal Information:
Physical Review Letters, Vol. 114, Issue 3; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 59 works
Citation information provided by
Web of Science

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Cited By (16)

Quasiparticle energy bands and Fermi surfaces of monolayer NbSe 2 journal October 2017
Glassy Dynamics in a heavy ion irradiated NbSe2 crystal journal September 2018
Chemical Vapor Deposition Grown Wafer-Scale 2D Tantalum Diselenide with Robust Charge-Density-Wave Order journal September 2018
Atomic-scale strain manipulation of a charge density wave journal June 2018
Characterization of collective ground states in single-layer NbSe2 journal November 2015
Unveiling hidden charge density waves in single-layer NbSe 2 by impurities journal November 2018
How stimulation frequency and intensity impact on the long-lasting effects of coordinated reset stimulation journal May 2018
Role of Charge Density Wave in Monatomic Assembly in Transition Metal Dichalcogenides journal February 2019
Quantum materials discovery from a synthesis perspective journal October 2017
Strongly enhanced charge-density-wave order in monolayer NbSe2 journal July 2015
Temperature-driven topological transition in 1T'-MoTe2 journal January 2018
Quasiparticle Interference Studies of Quantum Materials journal June 2018
How stimulation frequency and intensity impact on the long-lasting effects of coordinated reset stimulation posted_content September 2017
Characterization of collective ground states in single-layer NbSe2 text January 2015
Strongly enhanced charge-density-wave order in monolayer NbSe$_2$ text January 2015
Glassy Dynamics in a heavy ion irradiated NbSe2 crystal text January 2018

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